All issues
Successor
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
- Transactions of the Japan Society of Mechanical Engineers Series C
- Transactions of the Japan Society of Mechanical Engineers Series B
- Transactions of the Japan Society of Mechanical Engineers Series A
Volume 9 (1943 - 1944･･･
- Issue 37-4 Pages 113-
- Issue 37-3 Pages 53-
- Issue 37-2 Pages 103-
- Issue 37-1 Pages 161-
- Issue 36-4 Pages 89-
- Issue 36-2 Pages 69-
- Issue 36-1 Pages 121-
- Issue 35-4 Pages 27-
- Issue 35-3 Pages 23-
- Issue 35-2 Pages 43-
- Issue 35-1 Pages 33-
- Issue 34-4 Pages 1-
- Issue 34-3 Pages 1-
- Issue 34-2 Pages 1-
- Issue 34-1 Pages 1-
Volume 8 (1942)
- Issue 33-4 Pages 215-
- Issue 33-3 Pages 33-
- Issue 33-2 Pages 63-
- Issue 33-1 Pages 185-
- Issue 32-4 Pages 185-
- Issue 32-3 Pages 21-
- Issue 32-2 Pages 53-
- Issue 32-1 Pages 117-
- Issue 31-4 Pages 101-
- Issue 31-3 Pages 1-
- Issue 31-2 Pages 25-
- Issue 31-1 Pages 43-
- Issue 30-4 Pages 1-
- Issue 30-2 Pages 1-
- Issue 30-1 Pages 1-
Volume 27, Issue 183
Displaying 1-27 of 27 articles from this issue
- |<
- <
- 1
- >
- >|
-
Masao TSUYAMA, Masao TAGA, Yoshisuke TOKUCHYO1961 Volume 27 Issue 183 Pages 1687-1692
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this report, continued from the 1st report, the authors treated experimentally the flow of air-water mixture in the horizontal pipes which have a round branch pipe jutting into the main of rectangular section. First, an experiment on the flow of air-water mixture in a straight rectangular pipe was conducted, and its flow pattern, frictional loss, volume fraction of water and relative velocity were studied and the results were compared with those of a round pipe. The experiment has shown the coefficient of head loss ξb' and ξc' at a cross-branch section respectively as follows. [numerical formula] where ξb' and ξc'=coefficients of head loss at a cross branch section for branch pipe and main pipe respectively. wma' and γma'=real mean velocity and real mean specific weight at a cross branch section which is contracted by the jut of branch pipe end, respectively. wm=mean velocity. γm=mean specific weight. B and D'=height of a side and equivalent diameter of main rectangular pipe respectively. subscripts a, b and c=sections of upper main, branch and lower main pipes respectively.View full abstractDownload PDF (729K) -
Ichiro TANAZAWA1961 Volume 27 Issue 183 Pages 1692-1699
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the field of learning called "magnetohydrodynamics" the study on the flow of electrically conducting fluids in circular pipes not only is apparently one of the most essential but also has, from engineering point of view, various interesting applications. There exists, however, very little knowledge about it and the almost only analytical result ever obtained is Shercliff's approximate solution. In this paper the author improved and developed the Shercliff's work and obtained an exact solution as follows for the case of steady flow in a non-conducting pipe. [numerical formula] where P : Poiseuille number k : one-half the Hartmann number [numerical formula] Furthermore, experiments were conducted in which steady-state pressure drop and flow rate were measured using mercury as a conducting fluid, and the rightness of the theoretical analyses was proved thereby. note : Poiseuille number P=αa2/ηv0 α : pressure gradient, a : channel radius η : fluid viscosity, v0 : average fluid velocityView full abstractDownload PDF (804K) -
Yukio TOMITA1961 Volume 27 Issue 183 Pages 1700-1706
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSBagley and others showed that the additional loss at the entry of a capillary tube, through which viecoelastic fluid flows, was a strong function of the apparent shear rate. However, no one has ever attempted to treat analytically the entrance additional loss, as far as the author's knowledge is concerned. In this paper, assuming that the elastic energy is stored in the flowing fluid, this problem is approximately analysed. Then, the extrudate swelling (Barus' effect) and the extrudate irregularities are qualitatively explained. Moreover, the drag of a sphere placed in the viscoelastic fluid flow is calculated roughly.View full abstractDownload PDF (800K) -
Iwao OKI1961 Volume 27 Issue 183 Pages 1707-1716
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn order to answer the question asked by Prof. T. Uematsu in the discussion as to 7th Report of this research, we made a series of experiments with water on two disc valves, one d=28mm in diameter and the other, d=30.2mm in diameter. In these experiments lifting force P and discharge Q were measured at each valve lift l and effective head H was varied in 6 stages from 194 cm down to 9cm. From the results we can presume that, even if H is considerably larger than 194cm, P/H and Q/l√H would be higher or lower than the case where H=194cm by only a few per cent, as far as cavitation does not occur.View full abstractDownload PDF (1047K) -
Takakichi UZAWA1961 Volume 27 Issue 183 Pages 1716-1722
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSOn the vibrating mechanism of a valve which has an elastic plate installed parallel to the fluid flow, there are some monographs which dealt with musical instruments, such as clarinet and oboe, but the selfexcited vibration seemed to have been neglected. In the present paper it is described that when fluid passes through the narrow spaces, between the parallel plates which can move vertically by a spring action, an equation of motion of the valve and an equation of continuity which involves the compressibility of fluid are obtained. Then from them a differential equation of 3rd order is introduced and so by means of Routh's criterion, it is revealed that such a valve can give rise to a selfexcited vibration under a certain condition. An experiment verified this result by flowing air through this valve.View full abstractDownload PDF (1264K) -
Shigeo KUBOTA1961 Volume 27 Issue 183 Pages 1722-1731
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA theoretical method to estimate the effect or axial velocity change through a cascade was investigated. The change of axial velocity was reproduced by distributing sinks and sources within the blade passages, and the conclusions are set forth in some simple formulae. Some graphs for the numerical evaluation of the performance of NACA 65 Series cascades were prepared, and everal examples were compared with experimental data.View full abstractDownload PDF (1185K) -
Ei-ichi HORI1961 Volume 27 Issue 183 Pages 1731-1740
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA method of calculating the unsteady laminar boundary layer is presented. Two-dimensional flow of an incompressible fluid is assumed. The case of an oscillating outer flow, about a time-mean value, with a small amplitude and at relatively low frequency, is considered. By the use of a power-series expansion method, boundary layer around a body with an arbitrary shape and with a wedge-shaped nose of arbitrary angle, can be calculated. The solution is obtained as a linear combination of a set of universal functions. Velocity fluctuations in the boundary layer, of second order in magnitude, are taken into account. The time-mean velocity at a point in the boundary layer shifts as the amplitude of outside flow oscillation is increased. At the same time, the second harmonic fluctuation is produced. The method of calculation is applied to the boundary layer of a circular cylinder, and it is found that the influence of the second order velocity change is rather small, even at the outside velocity fluctuation 0.5 times the mean velocity.View full abstractDownload PDF (1114K) -
Taizo MURAKAMI, Setsuo FUKUNAGA, Mutsuro CHIBA1961 Volume 27 Issue 183 Pages 1741-1747
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSStudies were made on the measuring method of the dust concentration in the gas flow using a dust sampler of a flat paper filter type. The results of these investigation showed the dust concentration can be obtained only by measuring the rate of increase of the pressure drops per unit time on both side of the beds of filter paper, and needless to weigh the sampled dust in each case, but the value of specific resistance of the dust must be obtained beforehand by means of the preliminary experiment. So, the dust concentration C is expressed by the following formula. [numerical formula] where P^*(m) : the rate of increase of the pressure drops per unit time through the filter paper (dP/dt mmAq/min). η : dust collection efficiency of the filter paper (almost 100 %). μ : coefficient of viscosity of the flowing gas (kg s/m2). u : mean velocity of the flowing gas through the filter paper (m/s). α : specific resistance of the dust (m/kg).View full abstractDownload PDF (930K) -
Tokio UEMATU, Takesi KANO1961 Volume 27 Issue 183 Pages 1748-1759
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe authors have found a formula for the pressure drop of flow through a pipe by comparing the resistance of solids placed in an unlimited flow with that of solids when they are placed in a pipe. This formula shows the relation between the pressure drop in the flow through a straight pipe and the physical properties of fluid and the weight ratio of solids to air in the flow. The experimental constant in the equation is estimated basing on the results of experiments in conveying wheat and almina through a straight pipe. In order to find out whether or not this formula will prove of general use, we carried out experiments repeatedly under various conditions, letting soy beans, grain of synthetic rosin, cement, powdered clay and polishing sand run through straight pipes placed at various angles. The results of the experiment and the theoretical values of the formula show close agreement with each other within the range of the erros of measurement.View full abstractDownload PDF (1295K) -
Tokio UEMATU, Munekazu OMI1961 Volume 27 Issue 183 Pages 1759-1770
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper, the authors examined the formation of air core, the rage of its size under various operating conditions, and the flow patterns, by observing visually and photographically the movement of the dye injected, and the cotton thread stretched within a cyclone with transparent windows. The velocity and pressure distributions, energy losses as well as flow ratio were also measured with an 80mm cyclone and these results were compared with those obtained by many past investigators. For energy losses new types of formulas were presented. Furthermore the authors calculated the tangential velocity making use of the momentum theorem, and explained its character more clearly than had been done before.View full abstractDownload PDF (1739K) -
Tokio UEMATU, Munekazu OMI, Tetuo FUZISAWA1961 Volume 27 Issue 183 Pages 1770-1779
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper, the authors analyzed the motion of a solid particle within a hydrocyclone by solving two-dimensional dynamical equations. Then they presented a method for calculating the fractional recovery on the basis of these equations and the results obtained thereby were in satisfactory agreement with those obtained from various previous experiments. In addition to the above, the authors derived the characteristic equation for cyclone and a formula for the imaginary equivalent diameter of particle reporting 50% by weight to both underflow and overflow streams. Finally they presented the method of calculating by means of the fractional recovery the solid elimination efficiency and the thickening ratio as well as the results thereof compared with those obtained through various experiments.View full abstractDownload PDF (1109K) -
Tokio UEMATU, Kensaku IMAICHI, Kazuo KANEKO, Norio MATSUKI1961 Volume 27 Issue 183 Pages 1780-1789
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the present paper, the experimental data are shown with respects to the pressure and velocity distribution in the whirl pool chamber at different running states of a centrifugal blower. From these, some interesting phenomena which differ from what was expected when it was designed, became clear. Above all, the following is remarkable. Static pressure is hardly recovered in the neighbourhood of inlet, where the boundary layers along the both walls of chamber grow quickly as radius increases and their displacemental effect cancells the radial enlargement of area proportional to radius, and begins to increase uniformly after the flow passes through the inlet region. The efficiency of recovery of static pressure seems to be almost determined by the length of inlet region.View full abstractDownload PDF (1106K) -
Tokio UEMATU, Kensaku IMAICHI, Kazuo KANEKO, Norio MATSUKI1961 Volume 27 Issue 183 Pages 1789-1794
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe authors tried to aplly the viscous fluid theory to the flow in the whirl pool chamber under some adequate assumptions, and obtained certain results which were in a good agreement with the experimental data as described in Part 1. It follows that the recovery of static pressure in the inlet region is zero and a little obstructed by the wall friction in the fulfilled region, therefore the efficiency of recovery of static pressure is almost determined by the length of inlet region.View full abstractDownload PDF (737K) -
Hiroshi MIYASHIRO1961 Volume 27 Issue 183 Pages 1795-1800
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe water hammer action often bappens in pumping stations where several centrifugal or axial flow pumps having different design points and different characteristics are installed in parallel, and operated partially or totally depending on the demand of water, in order to maintain better efficiency of the plant. This paper deals with the analysis of water hammering action in parallel operation of different pumps. As one example for this analysis the parallel operation of two pumps is chosen, and hydraulic transients of each pump are calculated for two cases, where the discharge valves are closed or not after the power failure. By these calculations the following result has been confirmed : When power fails suddenly in parallel operation of the two different pumps, the discharge of one pump, of which the speed falls faster than the speed drop of another pump, does not decrease but increases for a short time after power failure.View full abstractDownload PDF (650K) -
Kazuo TAKEYA1961 Volume 27 Issue 183 Pages 1801-1808
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe limit of surging in a multi-stage axial-flow compressor cannot be definitely determined merely from the overall characteristic curve alone. This is attributed to the reason that the internal inertance and capacitance play an important role in the multi-stage axial-flow compressor. In this report, the appearing point of surging in case of involving a system of duct is obtained on the basis of the static characteristics of an axial-flow compressor, by the following two methods. 1) An approximate estimation from the respective inertances and capacitances, when a multistage axial-flow compressor is regarded to be able to be divided into three parts. 2) A strict solution when a multi-stage axial-flow compressor is assumed to have a continuous capacitance distributed along the axial direction.View full abstractDownload PDF (885K) -
Kazuo TAKEYA1961 Volume 27 Issue 183 Pages 1809-1816
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSAccording to the previous report of the present author, it was found that the surging point of a multi-stage axial-flow compressor can be elucidated to a certain extent, even in the case where the compressor is divided into a relatively small number of parts. In this report, as the simplest treatment, a multi-stage axial-flow compressor was divided into only two parts-the part of lower pressure and that of higher pressure. Then, the relations of the ratio of the respective inertance and capacitance of the two parts to the appearing point of surging were made clear, and the surging characteristics were also determined by means of examples of calculation. As a result, the properties of surging lines and the cause of their appearance, which are peculiar to the multistage axial-flow compressor and have been known empilically, were demonstrated clearly.View full abstractDownload PDF (946K) -
Takashi SATO, Itaru MICHIYOSHI, Kiichiro TAKEUCHI1961 Volume 27 Issue 183 Pages 1817-1822
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSContinued from the first report, this paper deals with the effects of subcooling, tube diameter and air content under the transient boiling caused by step heat input. The experiments were carried out under the condition of a natural circulation of the water under atmospheric pressure. The results obtained are as follows : 1) Until the turnout occurs, the surface temperature of heat generator (nichrome wire) is independent of the subcooling, the tube diameter or the air content, and the characteristics of heat transfer are similar to the steady boiling. 2) The time lag to the burnout caused, which increases with the decreasing of the power input, is proportional to the subcooling or the tube diameter, but it has no relation to the air content. 3) When the value of subcooling, the tube diameter or the power input is large, the burnout is caused by the partial film boiling, while it is caused by the bubble blocking when that value is small. In the case of the subcooling of 0°C, especially, the burnout occurs owing to the film boiling without being affected by the tube diameter. 4) The critical heat flux, which does not cause the burnout, depends on the subcooling or the tube diameter, but it is independent of the air content.View full abstractDownload PDF (797K) -
Ichimatsu TANISHITA1961 Volume 27 Issue 183 Pages 1823-1831
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe quantities of selfevaporated steam from saturated water under the diminuation of pressure was newly obtained by numerical integration of the basic differential equation which was derived by the author and also very convenient diagrams were constructed from the obtained values for the pressure range up to 50kg/cm2. The basic data used were taken from JSME revised steam table and VDI steam table. The values obtained are considerably larger as compared with those of Knopf's diagram for higher initial pressures.View full abstractDownload PDF (943K) -
Atsushi SAIMA1961 Volume 27 Issue 183 Pages 1832-1838
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIt is easy to determine the mechanism of time average eddy diffusion of fuel gas in a flame, but it is very difficult to determine the instantaneous movements of fuel gas in the flame. In the experiment described in this paper the fuel jet was ignited at various positions in the fuel jet by electric sparks, and the spreading of the flames was observed. Ignition probability was measured at various positions of the fuel jet, being determined by the mixture ratio and mean velocity of fuel jet and the velocity of secondary air. It seems that the ignition probability chiefly depends upon the fluctuation of the fuel concentration. It was found that, for an ignition for obtaining a steady flame, a spark must be provided immediately behind the burner tube wall.View full abstractDownload PDF (1401K) -
Takashi SATO, Itaru MICHIYOSHI, Ryuichi MATSUMOTO1961 Volume 27 Issue 183 Pages 1839-1845
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper deals with the theoretical analys's of one dimensional steady flow in a combustion chamber of gas turbine. In this study, the following were assumed : (1) The liquid fuel drops and combustion gas stream have a same velocity. (2) The law of combustion of single droplet is adopted to the combustion rate of fuel spray. (3) The combustion is not influenced by the condition of combustion gas stream. By using above three assumptions and the analysis which is analogous to Shapiro and Erickson's method(7), the total heat release rate, the local heat release rate, the temperature- and velocity-distributions in the direction of gas flow were calculated. In this study, it is found that the local heat release rate rapidly increases, but the temperature and velocity of combustion gas do not increase so rapidly as the local heat release rate and these values decrease after they become maximum. And the obtained local heat release rate has a similar form to the assumption that was reported in the previous papers(3)(4).View full abstractDownload PDF (797K) -
Hiroshi NISHINO, Akira OSAKI1961 Volume 27 Issue 183 Pages 1846-1853
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper is concerned with the air-bleed gas turbine and describes the air-bleed performance from the viewpoint of thermodynamics. It explains the design factors of the air-bleed gas turbine and the air-bleed performance under partial load. It further takes both the air-bleed gas turbine and the shaft-powered gas turbine and clarifies the mutual relationship of output characteristics (the air-bleed output, the shaft output and the air-bleed plus shaft output).View full abstractDownload PDF (930K) -
Kozo NAKAMURA, Teruo SAWADA1961 Volume 27 Issue 183 Pages 1854-1860
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA testing air turbine of double rotation type for the purpose of researching the dynamical characteristics of turbine blades is described together with the testing method, and the test results obtained from the conventional nozzle blades are also described. The test carried out measuring the torque and thrust acting on the nozz1e diaphragm and the air outlet angles and the velocity coefficients of blade were obtained. The results obtained from the Pitot tube traverses which were performed at same time, coincided with the results by our "torque-thrust method". And the experiments have revealed that the mean velocity and pressure of fluid flow into the turbine blades can be measured directly by the "torque-thrust method" at the running state of turbine.View full abstractDownload PDF (899K) -
Kozo NAKAMURA, Teruo SAWADA1961 Volume 27 Issue 183 Pages 1861-1866
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSAn air turbine designed for researching the dynamical characteristics of turbine blades was described in the 2nd report together with the results of nozzle test. In this paper, we report the testing method and the test results of turbine blades. The test was carried out measuring the torque and thrust acting on the nozzle diaphragm and turbine shaft at the running state of turbine, and the characteristics of turbine blades were analysed. The outlet air angles obtained by this method agreed with the results of Pitot tube traverses. Thus we proved that our "torque-thrust method" is also useful for the research of the dynamical characteristics of turbine blades.View full abstractDownload PDF (679K) -
Shigeo KUBOTA, Kazuaki IKEZAWA1961 Volume 27 Issue 183 Pages 1867-1873
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the low pressure parts of steam turbine, the annular flow areas are made diverging towards the downstream. In such a case, the fluid behaves the radial velocity which cannot be neglected in the calculation, In the beginning of this paper, a method to calculate the velocity distribution through such stages is presented, and some examples of application for the concrete flow pattern are described. And next, some results of the measurement of the flow through the last stage of actual marine turbine are described, showing that there exists good agreement with theoretical prediction.View full abstractDownload PDF (1203K) -
Fujio NAGAO, Makoto IKEGAMI, Isamu TAKAGAKI, Hiromu KONISHI1961 Volume 27 Issue 183 Pages 1874-1882
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe influences of direction of fuel injection and the temperature of combustion chamber wall on the ignition and combustion process in the swirl chamber of a Diesel engine was investigated by means of high-speed photographs synchronized with pressure diagrams. The summary of our results are as follows : (1) Ignition of the fuel is delayed by cooling effect of the wall. (2) Duration of combustion is prolonged by the concentration of fuel particles in the middle part of the chamber and the shortening of ignition delay as well as the increase of fuel adhering to the wall, which mitigates the rate of pressure rise due to combustion. (3) When fuel is injected along the wall, several features of combustion such as multiple ignition, blue flame combustion, and abnormal shortening of ignition delay are observed.View full abstractDownload PDF (2745K) -
Shunich OHIGASHI, Masayuki KITAO1961 Volume 27 Issue 183 Pages 1883-1891
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTo obtain significant data on the scavenging processes taking place in the cylinders of crankcase-scavenged two-stroke gasoline engines, it is useful to extract samples of gases from the combustion chamber at various times during the cycle. For these investigations a new electro-magnetically operated sampling valve, which extracts samples of gases from the cylinder at compression period after the scavenging and at expansion period after the end of combustion, has been developed. This paper presents the results of study on the scavenging efficiency and the trapping efficiency of a Schnurle type crankcase-scavenged two-stroke gasoline engine having 123 cc of stroke volume.View full abstractDownload PDF (1004K) -
Wen-Jei YANG1961 Volume 27 Issue 183 Pages 1892-1907
Published: November 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper deals with the dynamic response of a single-solid, single-fluid heat exchanger to the sinusoidal disturbances, which are (i) uniformly distributed heat generation in the solid wall, (ii) uniformly distributed wall temperature, (iii) uniformly distributed heat generation in the flowing fluid, and (iv) fluid inlet temperature in the heat exchanger having a constant heat generation in the solid wall. Analytical results for both the transient-periodic and frequency responses are presented. These results include the response of the wall and fluid temperatures and the wall-fluid temperature difference. A phenomenon of resonance in the amplitude-ratio and phase-shift is disclosed. The influence of the wall-fluid heat-capacity ratio on the dynamic response and resonance phenomena is discussed in detail.View full abstractDownload PDF (1509K)
- |<
- <
- 1
- >
- >|