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- 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 28, Issue 186
Displaying 1-25 of 25 articles from this issue
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Yutaka YAMADA1962 Volume 28 Issue 186 Pages 117-124
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe writer measured the torque between co-axial cylinder walls exerted by the water flow when the inner cylinder rotates. Furthermore, the writer carried out experiments on the co-axial cylinders having circumferential grooves on its inner cylinder surface. The results obtained are as follows : 1) When the grooves and the axial flow are absent, the torque coefficient Cf increases as the clearance between two cylinders increases, and when the peripheral Reynolds number Rω is large, the clearance has little effect on the value of Cf. 2) The axial flow extends the range of laminar state of Rω, where the value of Cf decreases, but when the axial flow increases beyond that range the value of Cf increases again. 3) When there are grooves on the cylinder, it becomes difficult to keep the flow laminar, so that the torque does not decrease with the increase of the axial flow.View full abstractDownload PDF (969K) -
Yutaka YAMADA1962 Volume 28 Issue 186 Pages 125-132
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe resistance of flow through co-axial cylinders of which the inner cylinder rotates is studied experimentally, when there are grooves peripherally on the inner cylinder or on the outer cylinder. Results obtained are as follows : 1) When the Reynolds number Re is larger than about 200, the value of resistance coefficient λ of grooved cylinder is much larger than that of no grooves, whether the inner cylinder rotates or not. 2) When rotating Reynolds number Rω is large, the value of λ increases with the increase of clearance. 3) When pitch of grooves is constant, the value of λ increases with the increase of breadth of the grooves.View full abstractDownload PDF (898K) -
Eitaro SUGINO1962 Volume 28 Issue 186 Pages 133-137
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe Navier-Stokes equation is linearized for the steady flow in the laminar inlet of a pipe with annular space. This solution shows the family of velocity profiles defined by the modified Bessel functions. By applications of this family to the momentum equation and the energy equation, respectively, the inlet length and the pressure drop are presented. Some examples of computation are given for the ratio of the inner and outer radii of annular space, m=1.2∼5. Tbe results of computation prove that the relation between the dimensionless distance from pipe entrance σ=x/(R2-R1)Re and the pressure drop (p0-p)/(ρu02/2) is almost unaffected by m, and the inlet length σL is also unaffected. Practically, σL may be evaluated to be 0.02.View full abstractDownload PDF (580K) -
Tatsuya HAGIWARA1962 Volume 28 Issue 186 Pages 138-144
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn connection with pneumatic micrometers, the outward flow characteristics of narrowly spaced radial-flow nozzles are studied with analytical methods. Assuming that fluid is incompressible and the velocity distribution in a boundary layer is parabolic, the momentum equation of a laminar boundary layer is solved approximately. Thus it becomes possible to calculate theoretically the inlet length, the velocity distribution in the clearance, the pressures at various radii or the pressure loss of any nozzle. As a corresponding value to Reynolds number, in this case, R=Vh2/vr1, should be used, where h is a breadth of a clearance, r1 is the inner radius of a nozzle and V is a radial mean velocity at r1. Then profiles of pressure and velocity distributions are determined by R only.View full abstractDownload PDF (764K) -
Tatsuya HAGIWARA1962 Volume 28 Issue 186 Pages 145-150
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe inward flow characteristics of radial-flow nozzles are studied by the similar procedure to the 1st report. As a parameter, R= Vh2/vr2 should be used to calculate velocity distributions in the clearance and pressure losses, etc., where r2 is the outer radius of a nozzle and V is a radial mean velocity at r2. When R is over 5.42, boundary layers cannot fill up the clearance, and if R is less than 5.42, the velocity distribution in the clearance becomes perfectly parabolic, that is, Poiseuille's flow will be established. In either case, the thickness of the boundary layer reduces to zero at the center of the nozzle. Therefore, the pressure loss of the nozzle should be expressed by one of the three different equations according to the combination of R and the diameter ratio of the nozzle.View full abstractDownload PDF (692K) -
Tatsuya HAGIWARA1962 Volume 28 Issue 186 Pages 150-156
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper concerns with the experimental results of the outward and inward flows in radial-flow nozzles. With an air source of 500 mmAq gauge pressure, the overall pressure losses and pressure distributions are obtained for various flow rates. It follows that the results of the theoretical analysis obtained in the 1st and 2nd reports are applicable to the practical problems with reasonable accuracy in spite of simple assumptions. However, when flow is outward and the inner corner of a nozzle is sharp, a severe contraction will occur and experimental results will not be consistent with theoretical values. Since the clearances of the nozzles dealt with are extremely narrow, the velocity distribution in the clearance cannot be obtained by the experiment.View full abstractDownload PDF (802K) -
Tatsuya HAGIWARA1962 Volume 28 Issue 186 Pages 157-163
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESS -
Tokio UEMATU, Takesi KANO1962 Volume 28 Issue 186 Pages 164-171
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe authors have found a formula for the pressure drop of the flow through the bend conveying granular solids. The experimental constant and index number in the formula are estimated from the results of experiments in conveying wheat through the bends with various curvatures. In order to prove the applicability of this formula to practical use, experiments were repeated under various conditions conveying almina through the bends placed in the horizontal or vertical plane. The values of the formula almost agree with those of experiments within the range of errors of measurement.View full abstractDownload PDF (920K) -
Tokio UEMATU, Takesi KANO1962 Volume 28 Issue 186 Pages 171-179
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe authors have introduced a new formula for the motion of granular solids supplied in an air flow through a pipe and further shown a formula for the pressure drop of the flow at a constant velocity through a pipe due to acceleration and the conveyance of solids. In order to prove the applicability of these formulas to practical use, experiments were repeated under various conditions conveying wheat and alumina through straight pipes placed in the horizontal or vertical plane. Moreover the flow of solid in transparent pipes has been observed. The experiments and observations are effective in deciding the velocity and pressure of air required for the conveyance of solids through a pipe.View full abstractDownload PDF (2535K) -
Tokio UEMATU, Takesi KANO1962 Volume 28 Issue 186 Pages 180-187
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe authors have introduced a new formula for a minimum velocity of air flow required for the pneumatic conveyance of solid through a pipe. They have examined experimentally the minimum air quantity required for feeding a solid substance from a feeder of blow tank type. These studies are effective in deciding the air velocity and quantity required for the conveyance of solids through a pipe or to feed them from a feeder. Moreover they have introduced the formulas for the air pressure required for blowing off the plugging layer of solids in pipe.View full abstractDownload PDF (984K) -
Susumu MURATA1962 Volume 28 Issue 186 Pages 187-193
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTo design a mixed-flow impeller, the impeller must be divided into partial runners by flow surfaces, which are determined usually without considering the action of blades. In this report the following two methods established by the author to determine the flow surface are described. These methods are more reasonable, because proper considerations have been given to the action of blades.(1) In the 1st method, the author has solved numerically the fundamental partial-differential equations for the flow in the interior, in front, and in the rear of the impeller respectively, which have been derived from the equations given by Lorenz and Bauersfeld.(2) In the 2nd method which is an approximate method, the author has solved graphically the fundamental equation for the flow in the interior of impeller by transforming the coordinates. An example is shown comparing the 1st and 2nd methods with the usual one.View full abstractDownload PDF (812K) -
Eitaro KISIOKA1962 Volume 28 Issue 186 Pages 194-203
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper mainly pertains to the development of the author's basic theory proposed in his last paper, for an impeller with inserted half-blades. Therefrom it is revealed that there exists a stable outward flow around the half-blade located in the outer region of the impeller, whereas the flow on the front surface of the main blade remains to be improved. Also, the author discloses a paradox which generally concerns the circulation around the rotating profile with a rounded trailing edge. A brief section is assigned to the application of the theory to the analysis of the radial-inward-flow turbine, with the results manifestly characteristic of the assumed two-dimensionality of flow.View full abstractDownload PDF (997K) -
Shoju ITAYA, Tomosuke TEJIMA, Takao NISHIKAWA1962 Volume 28 Issue 186 Pages 203-206
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSAs to the formula predicting the fficiency of prototype water turbines by their model tests, many formulas have been already presented by many investigators and are used practically. It seems, however, these formulas are not always exact as to treatment of hydraulic pressure losses. In this paper the authors show the method predicting the efficiency of prototype water turbines using the model test data at different speed. By this method more certain values of the efficiency are able to be obtained. A similar calculating method are applied to the test data using the different size models also.View full abstractDownload PDF (595K) -
Masaya MURATA, Masao ISHIOKA1962 Volume 28 Issue 186 Pages 206-215
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSGenerally it is reported that the plastic flow in an extruder of single screw type, is a combination of drag flow, pressure flow and transverse flow, ignoring leakage flow. However, in case of hard vinyl chloride, the substance filling up the screws was taken out from several machines and examined and it was found that there was no such flow as mentioned above, but the pressure flow along the back side of the screws. It can be explained that this phenomenon happens, because of the pressure difference between the front and back of screw threads, on the assumption that at the solid part the friction between particles or between particle and wall is proportional to the pressure and at the molten part the friction against the wall is proportional to the relative velocity, and also because of Bingham fluid at molten part. As a result the flow along the back of screw thread is called pressure slip flow or vacuum flow, because it is considered that the flow is caused by the vacuum at the back of screw thread.View full abstractDownload PDF (2334K) -
Masakichi ISHIKAWA, Naomichi HIRAYAMA, Toshiyuki MAEDA1962 Volume 28 Issue 186 Pages 216-224
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe present paper deals with a simplified experimental method to determine the cascade characteristics by meams of specially designed probes which swing with an amplitude of one blade spacing at a constant speed in the downstream of blade cascades in order to average the spatial distributions of pressure. A model measuring apparatus was manufactured, and its applicability was examined experimentally. The results are as follows : 1. This method is applicable, if the coefficient of the total pressure loss is smaller than 0.1. 2. In this case, the errors in averaging outlet static pressures and outlet angles due to this method are within the limit of measuring errors. 3. If the coefficient of the total pressure loss is known, the coefficient of the wake momentum loss, which is necessary for obtaining the lift and drag coefficients, can be calculated on a few suppositions. 4. Due to this method, the time required for the measurment is only 1/8∼1/10 of that for any conventional method.View full abstractDownload PDF (1291K) -
Shigeo KUBOTA, Susumu MORITA1962 Volume 28 Issue 186 Pages 225-234
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis report presents the results of high speed cascade tests for some turbine blades. The wind tunnel used for the cascade test had the test section at the suction side of blower, and the control of the boundary layer at the side wall was ignored for the sake of simplicity. One typical impulse blade and also one nozzle profile were tested, and the effects of pitch-chord ratio were mainly investigated.View full abstractDownload PDF (1940K) -
Taizo MURAKAMI, Setsuo FUKUNAGA, Mutsuro CHIBA1962 Volume 28 Issue 186 Pages 235-241
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSStudies were made on the dust collection efficiency and the specific resistance of flat paper filter, which were very important factors for our measuring method of the dust concentration in the flowing gases. In these studies, it has been found that the true dust collection efficiency of the filter paper must be expressed by the value of η*=dW/dWs instead of η=ΣW/ΣWs and also the specific resistance expressed by the value of α*=dKd/dw instead of α=Kd/w. And then, the conception of the initial efficiency of the paper filter, the saturated dust quantity of 100% collection efficiency and the critical dust quantity of the specific resistance have been introduced. Results of both the collection and draft tests in consideration of the above, have revealed the following : (1) η* approached 100% in accordance mith piling of dust on the paper filter.(2) The mean values of the specific resistance α* gained from the preliminary experiments should be used as the constant values of the specific resistance.View full abstractDownload PDF (861K) -
Taizo MURAKAMI, Setsuo FUKUNAGA, Mutsuro CHIBA1962 Volume 28 Issue 186 Pages 242-249
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSOn the measuring method of the dust concentration in the gas flow using a dust sampler of the flat paper filter type, we have, up to the present, determind the value of the dust concentration C by measuring the value of P^^· which designates the rate of increase of the pressure drops per unit time through the flat paper filter. And then, if the value of P^^· is expressed directly and continuously, the dust concentration C could be obtained in the same manner. This report has been made on the continuous and direct measuring apparatus of P^^· by means of the substitution of q for P^^·, and hence, q is the value of water quantity which is transferred in a special water manometer according to the increasing of P^^·. Therefore, the value of P^^· can be expressed by the following formula : P^^·=κq in this formula, the value of κ is a function of the surface area of special water manometer. The raults of these investigations, have revealed that the value of P^^· can be obtained continuously and exactly enough by measuring the value of q which is indicated by the small rotameter.View full abstractDownload PDF (1003K) -
Taizo MURAKAMI, Setsuo FUKUNAGA, Mutsuro CHIBA1962 Volume 28 Issue 186 Pages 249-256
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn an earlier paper of this series, we showed that the dust concentration in the air flow ought to be assumed by the value of P^^· which increased according to the dust piled upon the paper filter. And in the secondary paper, the collection efficiency of the paper filter and the specific resistance of the loaded dust were studied. And then, the recently a paper on the characteristics of the continuous measuring apparatus of the value of P^^· has been presented. By the results of these investigations the continuous measuring apparatus of the dust concentration was manufactured for trial. The present report deals with the results of the measuring test of the dust concentration in the air using the trial apparatus. In spite of the fact that this measuring apparatus is simple in construction, measuring in a comparatively extensive area is possible provided it is properly handled. We have found out that the measuring of, for instance, the values of 0.004∼67.2g/m3 is possible, which was used in the present experiment.View full abstractDownload PDF (1162K) -
Sugao SUGAWARA, Takashi SATO, Tatsuo MINAMIYAMA1962 Volume 28 Issue 186 Pages 257-264
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this report, the new characteristic equations and tables of mercury vapour are shown, basising on the results of our experiment on the relation between temperature and pressure of saturated mercury vapour, and using the experimental values of enthalpy of saturated liquid mercury by T.B. Douglas and the others. The experiments were carried out in the temperature range 328°∼656°C, and the pressure range 0.6∼40kg/cm2, and the experimental fermula on the saturation pressure ps(kg/cm2) was established by using these results as follows : [numerical formula] The equation of state of mercury vapour calculated by using the Gibb's free energy equation and the formulae mentioned above and other results is as follows : [numerical formula] where, P is pressure kg/m2, T=273.15+t is absolute temperature °K, t is temperature °C, v is specific volume m3/kg, R is gas constant of mercury vapour 4.226 2 kgm/kg °K. The numerical values of specific volume, enthalpy, and entropy were calculated from this equation and its derived equations and the mercury vapour tables wre tabulated.View full abstractDownload PDF (989K) -
Naotsugu ISSHIKI1962 Volume 28 Issue 186 Pages 265-277
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA new type of heating surface, which is composed of swirl gas-flow nozzle at the entrance and single or double tube coils concentrically situated in the swirling gas flow, is introduced here. The features of this type are that, by changing the nozzle angle, the gas speed can be controlled indifferently to volumetric gas flow quantity, and that tubing does not need to be bend sharply. Several typical models of this heating surface system have been tested by a fundamental experimental set with electrically heated wire-coils and cooling air. The approximate relation between the Nusset number Nu and Reynolds number Re of tube is thus known to be : [numerical formula] where L, D0 are coil acial length and cylinder-diameter respectively and c is a constant changed by nozzle shape and nozzle exist angles. On the newly designed super-charged super-critical monotube boiler, two heating surfaces of this type were tried ; and their performance are reported here.View full abstractDownload PDF (1879K) -
Fujio NAGAO, Harutoshi KAKIMOTO, Shuji OHTA, Masami KONISHI1962 Volume 28 Issue 186 Pages 277-285
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the previous paper the temperature rise due to throttling was applied to a starting aid in a four-cycle Diesel engine. To apply the same method to the crank case scavenged two-cycle diesel engine, theoretical calculation and measurement of the scavenge air temperature has been performed for the various throttle ratios which contain throtle area, piston area and piston speed. Results obtained are summerised as follows : (1) The scavenge air temperature rises as the throttle ratio decreases.(2) For the limited number of cranking, the temperature rise becomes maximum at a proper throttle ratio.(8) For the same throttle ratio, the temperature rise in a engine of piston port type is twice as high as in that of automatic valve type.View full abstractDownload PDF (1169K) -
Iwao KOIZUMI, Yoji KITAOKA1962 Volume 28 Issue 186 Pages 286-293
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSSpontaneous ignition delay of fuel spray injected into a hot air stream produced by burning of propane has been measured, using test rig consisting of 200φ×3m parallel duct. Results obtained were compared with those by Mullins, who had carried out the same experiment in the range of much higher stream temperature and velocity, and with the delay obtained by other methods at atmospheric pressure. Main part of the conclusion can be summarized as follows : Controlling factor of ignition delay in gas stream is considered to be of chemical nature judging from activation energy, 35∼45 kcal/mol. It depends predominantly on the temperature and less on the physical factors such as velocity or spray condition. This is explained as follows : in spite of rapid formation of uniform mixture, velocity and concentration existing is outside the stability range of spray and cannot lead to flame propagation against other ignition processes.View full abstractDownload PDF (1116K) -
Tadashi KUSHIYAMA1962 Volume 28 Issue 186 Pages 294-303
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe object of this paper which deals with the phenomena at the end of injection of Bosch pump injection system is to show the relation between the design of fuel injection equipment and the pressure drop at the pump side. It was found from experiments that the pressure drop had two features. Pressure at the pump side drops down along a fundamental pressure dropping curve. The fundamental pressure drop is a function of crank angle, injection pipe area, etc., but not of engine speed. The pressure drop along this curve has a maximum value which is decided mainly by the design of the delivery valve of the pump. The theoretical equations of pressure change and flow through the delivery valve port are obtained after reasonable treatment. Assuming suitable factors, the solution of these equations coincided very well with the experimental results.View full abstractDownload PDF (1943K) -
Keikichi TANAKA, Kiyoshi IDEHARA, Noriyasu ISHIDA1962 Volume 28 Issue 186 Pages 304-314
Published: February 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the previous report, it was shown that without considering dissociation, the thermodynamic properties of the products of combustion varied almost linearly with 1/n, where n is the excess air factor. In the present report, the composition and the enthalpy of the products of combustion of air and a typical jet fuel are calculated, dissociation being taken into account. The results show that for the enthalpy of the mixture an approximate linear expression similar to that proposed in the previous report, i'(T, p, n)=iD'(T, p, ∞)+iDΔ'(T, p)·(1/n), can be used as a good approximation. The coefficients of the approximate expressions are presented for the three temperatures T=2000, 2500, 3000°K and for the five pressures p=0.1, 0.5, 1, 5, 10kg/cm2. The error in i'(T, p, n) runs as high as 1.6 per cent, but they are less than 1 per cent in the range chiefly of interest in engineering.View full abstractDownload PDF (1048K)
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