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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 192
Displaying 1-16 of 16 articles from this issue
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Yuzi SATO1962 Volume 28 Issue 192 Pages 881-890
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSAlthough it is a trivial fact that the coefficient of loss of head due to branching and confluence are affected by the radius of curvature or shape of branch corner, quantitatively trustworthy data are lacking. The author has carried out a series of flow tests in rectangular T type ducts with variable branch corner, and presented the coefficients in relation to the radius of curvature. Dimensions of the duct are 100×100mm in main line and 100×100, 75×100, 50×100, 25×100mm in branch line. The Reynolds' number of the main flow ranges from 2×105 to 3×105. Many stream-line photos of branching and confluence are referred for the illustrations.View full abstractDownload PDF (1133K) -
Ei-ichi HORI1962 Volume 28 Issue 192 Pages 890-897
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe mean and fluctuating velocities in the boundary layer of a circular cylinder, oscillating in the direction of the wind tunnel stream, have been measured using the hot-wire anemometer. The results have been compared with theoretical predictions. (1) The effect of the volocity fluctuation on the mean velocity in the boundary layer is found to be negligible when the ratio of the amplitude of fluctuation of the outer flow to the mean velocity is less than 0.3. This agrees with theoretical predictions. (2) Upsteam from the point of minimum pressure, the effect of the frequency of oscillation on the boundary layer is found to be negligible when the frequeney parameter is less than 0.3. The results of calculation, on the assumption of quasisteady flows, agree well with experimental velocity distributions. (3) When the separation point is approached, the discrepancy between the theoretical and experimental results increases. Although the discrepancy is mainly attributable to the premature truncation of the series solution used in the theoretical calculation, other causes are left to be explored.View full abstractDownload PDF (987K) -
Wen-Jei YANG1962 Volume 28 Issue 192 Pages 898-911
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA general solution is presented for a transient in a single-solid single-fluid heat exchanger resulting from an arbitrary space-and time-dependent variation of heat generation which can be expressed by ψ(x)·φ(τ). These results, which are obtained by a direct mathematical attack on the governing differential equations, include the response of the wall and coolant temperatures. As a special case, the step response of a heat exchanger having sinusoidally space-dependent internal heat generation is given. Heat exchangers to which these results apply include the heterogeneous nuclear reactor.View full abstractDownload PDF (1233K) -
Jumei KIWAKI1962 Volume 28 Issue 192 Pages 912-920
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSPool boiling of water from a vertical surface and two upward-facing flat surfaces was experimentally studied under atmospheric pressure by making use of the apparatus described in the first report. The range of heat flux covered the entire region of nucleate boiling up to the burnour limit. The shape of the curve showing the relation between the heat flux and the temperature difference was similar to the curve for thin wires. When the heat flux exceeded 4×105 kcal/m2h, bubbles coalesced on the heating surface before leaving it. In the vicinity of the burnout limit, very large lumps of vapor rose intermittently from the heating surface. Experimental equations were set up by making use of Stanton number for the heat transfer coefficient, Reynolds number for the steam velocity leaving the surface, and the size of the heating surface.View full abstractDownload PDF (2046K) -
Ikuo MABUCHI1962 Volume 28 Issue 192 Pages 921-929
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe effect of suction and blowing on free convection heat transfer along a vertical flat plate is analysed by an approximate method by using the integral formulas for momentum and energy equations. There are similar solutions, if the surface temperature distribution is expressed by the equation Tω=T∞+Axn (x : distance from leading edge, A, n : constant, T∞ : temperature at quiescent ambient fluid) and the blowing and suction rate distributions are proportional to x(n-1)/4. Approximate similar solutions under these conditions may be applied for any exponent n(0≨n≨1) in a power law temperature distribution and the gases for any Prandtl number, if the blowing and suction Reynolds number is restricted within the following range. at n=0 [numberical formula] at n=1 [numberical formula] where ν is the kinematic viscosity of fluid and Grx denotes the local Grashof number at the position x.View full abstractDownload PDF (1075K) -
Shu HASEGAWA, Kiyoshi YAMAGATA, Kaneyasu NISHIKAWA1962 Volume 28 Issue 192 Pages 930-939
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe characteristics of free convection heat transfer in an open thermosyphon tube are that the flow is confined in a nerrow space and that the downward flow in the central zone of the tube is induced from the upward free convection flow rising along wall, therby rendering flow pattern more complex. In order to solve the mechanism of this complex flow, it is essential to observe the flow pattern in an open theremosyphon tube. Therefore experiments were carried out with the open theremosyphon apparatus which had a passage of rectangular cross section surrounded by two facing glass plates and two facing heating surfaces. And then flow pattern was detected through the Schrielen method or shadow method. The results of experiments was that flow pattern was grouped into three regimes and that between the steady flow regime and the boundary layer flow regime there was the transition regime in which the flow, unable to reach the stable state, remained in an unstable state accompanied by unsteady up-flow and down-flow, but the mean heat transfer coefficient in this regime was not so harmed.View full abstractDownload PDF (1826K) -
Shu Hasegawa, Michitada Morisue1962 Volume 28 Issue 192 Pages 940-946
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the first report experiments were carried out in rectangular passage for the observations of the flow pattern. In this report, experiments were carried out on circular tube, changing both length and diameter, in order or obtain more exact heat transfer data as well as to cover the data of the more turbulent region. From the experimental results it was found that in some cases heat transfer in turbulent region was very different from that in laminar region, and this was influenced Prandtl number of the fluid and length-radius ratio of the tube. The full discussion of the results will be done in the next report.View full abstractDownload PDF (1042K) -
Shu HASEGAWA1962 Volume 28 Issue 192 Pages 947-960
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the first report experiments were carried out on rectangular passage for the observation of the flow pattern, and in the second report the heat transfer data in an open thermosyphon tube including the turbulent region were showed by an appratus with circuler passage. In this report the effect of the boundary condition of experiments was investigated, and then the results of the experimental data were discussed in detail. Thereby the explanation of the heat transfer mechanism of thermosyphon in both laminer and turbulent regions was tried. In the laminer region experimental data agreed closely with analytical solution. But ocurring the turbulence, it probably originate at a place between up-flow and down-flow, and at first only the down-flow was confused, and then heat transfer data were little different from those in the laminer region. When the turbulence occured in the impeded flow regime, it, however, extended to all tubes at once, and then heat transfer data were considerably varied, but they were correlated by using Prandtl number and length-radius ratio as parameters. Finally the correlating equation for the heat transfer in the open thermosyphon was derived.View full abstractDownload PDF (1817K) -
Sadayoshi MASUDA, Yukio MURAKAMI1962 Volume 28 Issue 192 Pages 961-965
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThermoelectric Cooling Elements (=TE) were applied to measure thermal conductivities (=λ) of some materials. By this method, the measuring process becomes very simple and fast compared with ordinary one and does not need the preparation of large specimen. The principle of this method is as follows : the specimen (membraneous material) is inserted between the cold junction* of a TE and the hot junction* of the other TE. In the stationary state of this condition, the temperature difference between the cold and the hot junctions of each TE is determined by λS/d** of the specimen, and Seebeck counter electromotive force is parallel to the temperature difference. Therefore, the value of λ of the specimen can be obtained through the measurement of this counter electromotive force. * must be as flat as possible ** S : area of cross section, d : thicknessView full abstractDownload PDF (649K) -
Motokazu HUKUDA1962 Volume 28 Issue 192 Pages 966-973
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSGenerally, the attenuation effect of a muffler is influenced by its volume, and the larger the volume the less the rate of increase of the effect. From the point of the pure linear theory on the muffler, it is considered that the attenuation effect of the muffler is determined generally by the ratio of the cavity to the section area of the pipe. The values calculated by the equation have been found in good agreement with those obtained from the experiment by a speaker. But, examining by a gasoline engine, the author found that it is not always so. That is, with the same volume of cavity, the attenuation effect becomes worse as its shape is flatter. Next, the author divided the cavity into some parts, and tried experiments on the effect of the number of division and the shape of the partition plates.View full abstractDownload PDF (1013K) -
Tadashi KUSHIYAMA1962 Volume 28 Issue 192 Pages 974-983
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper deals with the secondary injection and delay of injection end. Experimental studies show that delay of injection end becomes larger as the engine speed increases and that the minimum engine speed at which secondary injection takes place changes according to the control notch, delivery valve design, foreopening pressre at the injection valve, pipe or nozzle area, etc. On the assumption that there is a certain relation between pressures on the pump side and injection valve side, theoretical equations of secondary injection and delay of injection end are obtained by using the solution mentioned in the previous paper. Assuming suitable factors, the results obtained from these equations almost agreed with the experimental results. As the results, we can predict by calculation the secondary injection speed and delay of injection end in any fuel injection system.View full abstractDownload PDF (1583K) -
Hiroshi YAMAUCHI1962 Volume 28 Issue 192 Pages 983-990
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe effects of engine running speed on cyclone dust collection efficiency were researched by motoring tests changing the mean inlet velocity and engine running speed by adjusting throttle valve of carburettor. It has been found out that, with exception of high engine running speed accompanied with extremly high inlet velocity, the effects of engine running speed on dust collection efficiency are generally negligible compared with the effects of inlet velocity. The efficiency decreased sharply with high engine running speed accompanied with extremly high inlet velocity. Experiments revealed that cause of this was not that the efficiency of cyclone with steady flow decreased sharply at high inlet velocity, but that the suction air flew back again and blew up the dust particles deposited in the dust box. Further, the effects of valve timing of the engine on the amounts of back flow were tested.View full abstractDownload PDF (1224K) -
Fujio NAGAO, Makoto IKEGAMI, Yujiro OSHIMA, Kazuhiro MIZUSHIMA, Takahi ...1962 Volume 28 Issue 192 Pages 991-998
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSWith a view to preventing the idling knock of a pre-combustion chamber type Diesel engine, a method to raise the compression temperature by means of inlet throttling has been applied to a test engine to examine the availability of the device. From measurement of engine noise and indicator diagrams, it has been revealed that by an adequate throttling the combustion noise, even if rather hard knock, is weakened to knock-free running, e.g. maximum rate of presure rise in the main combustion chamber from 6.5kg/cm2/deg.C.A. to 2.0kg/cm2/deg.C.A. at 60°C of temperature at cooling water exit. The reduction, however, is limited when knock is too hard, since abridgement of ignition delay of the fuel caused by the throttling does not serve to prevent the combustibles from passing into the main combustion chamber.View full abstractDownload PDF (1340K) -
Kenji HORI1962 Volume 28 Issue 192 Pages 999-1006
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTwo valves were specially installed on the cylinder head of an engine of two-stroke cycle, and gases were sampled through these valves, while this engine was operated continuously as of four-stroke cycle for this investigation. The result of this experiment are as follows : 1. The volume of sampled compression gas must amount to more than 20 percent of effective cylinder volume. 1'. If the volume cannot be over 20%, the sampling must take place near the top dead center. 2. The expansion gas must be extracted at the period just before scavenging, and its volume has to be small. 3. In addition, it was found that the relative charge equals 0.65 to 0.75. The author would like to express his sincere thanks to Dr.F. Nagao, professor of Mechanical Engineering, Kyoto University, for his valuable suggestions and guidances throughout this investigation.View full abstractDownload PDF (1136K) -
Hideya MIYABE, Tatsuro SHIMOMURA1962 Volume 28 Issue 192 Pages 1006-1016
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA method for the measurement of trapping efficiencies of a two-stroke gasoline engine through the exhaust gas analyses is investigated. Theoretical formulas of trapping efficiency are introduced which can be applied to a rich or a weak mixture operation. The experiments are carried out with special precautions to secure representative sample gases, and the gas analyses are conducted by a newly developed Orsat apparatus with excellent accuracy. It is shown, from the results of the present study, that the reliable trapping efficiencies are obtainable according to the author's method.View full abstractDownload PDF (1196K) -
Joji YAMAGA, Hiromitsu FUKUDA, Morio JIDO, Takao SHIMIZU1962 Volume 28 Issue 192 Pages 1017-1021
Published: August 25, 1962
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe transpiration cooling is an effective method for cooling the porous body in high temperature stream by ejecting the coolant from the porous surface and covering the body by the cool boundary layer. Many experimental and theoretical works have been done in the world and clarified the effectiveness of this cooling method. But experiments concerned with the surface temperature gradients on the transpiration cooled body (pipe or flat plate) along the stream are rare and it seems that the measurements of surface temperature distributions on a transpiration cooled model (for instance circular cylinder or elliptic cylinder in cross flow) are not yet achieved. This report deals the experiments of measuring the transpiration cooled surface temprature on the model (porous circular and elliptic cylinder in cross flow) in high temperature streams and shows quantitatively the surface temperature distributions on the model and clarifies that this surface temperature gradients of the cooled surfaces were produced by the non-uniform ejection of coolant along the body surface caused by surface pressure gradients.View full abstractDownload PDF (1024K)
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