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 19, Issue 85
Displaying 1-22 of 22 articles from this issue
- |<
- <
- 1
- >
- >|
-
Takefumi IKUI, Toshihiko UEDA1953 Volume 19 Issue 85 Pages 1-6
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSWith the development of axial flow compressors for gas turbines, the other flow patterns are investigated in addition to free vortex type, for the purpose of increasing pressure rise in a stage and decreasing the diameter and number of stages. This paper describes the expressions for (1) inlet solid vortex flow pattern, (2) outlet solid vortex flow pattern, (3) mean value solid vortex flow pattern, (4) whirl constant flow pattern, in the case of pressure rise at rotor is constant for all radii. We can obtain arbitrary velocity profils combining the stages having the above described flow pattern and the stages in which pressure rise is not constant at all radii. Finally, an example for the all radii 50% reaction type is presented.View full abstractDownload PDF (768K) -
Takefumi IKUI, Toshihiko UEDA1953 Volume 19 Issue 85 Pages 6-12
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn our previous report Part I, we described that the axial components of velocities of fluid va1 and va2 were expressed as a function of revolution per minute and theoretical pressure increase Ptk for given flow pattern. This paper describes the non-dimentional expressions for that given in Part I, so that treatment and comparison may be simplified. Considering the conditions of stall at the root of blade and allowable maximum Mach number, we give a design mothod for the inlet and the mean value solid vortex flow types which are most important in the solid vortex flow type axial compressors. Further, we show an example of the all radii 50% reaction type. Finally the characteristics of the free vortex and the solid vortex types are compared and the merits of the latter are clarified.View full abstractDownload PDF (952K) -
Takefumi IKUI, Kashiku TODA1953 Volume 19 Issue 85 Pages 12-17
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the previous reports (Part I and II), the calculating methods of various solid vortex type flow patterns were presented. In this report, the expression of efficiency of the solid vortex types is introduced. For the free vortex flow, the manometric efficiency of blade combining rotor and stator becomes maximum for the case of symmetric velocity diagram at the geometrical mean radius. Though the flow conditions which are both solid vortex in the inlet and the outlet of rotor, are two-dimentional in the rotor, back flow occurs at the root of rotor for the multistage axial compressor. But they might be used for pre-rotors. Then the general methods of obtaining velocity profils which are comparatively similar to free vortex by putting the stages which the pressure increase in rotor is not constant at the inlet of compressors suitably, are presented. Finally an example for the outlet solid vortex type is expressed.View full abstractDownload PDF (888K) -
Shintaro OTSUKA1953 Volume 19 Issue 85 Pages 18-21
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSCalculating the latticed wing of small pitch-chord ratio, it is observed that its outflow direction is scarcely affected by its inflow direction. This tendency seems to increase with the increase of the ratio of passage length to width, rather than the pitch-chord ratio itself. Does only the ratio of passage length to width affect to this fact, or will other wing shapes affect, too? It must be examined. With this intention, I have inquired into the potential theory of small pitch latticed wing, and reached the following conclusions : It is noticed that the outflow direction of latticed wing become : invariable rapidly by reducing its pitch, and not only the ratio of passage length to width, but the inflow angle and outflow angle affect to this character.View full abstractDownload PDF (542K) -
Masao HASEGAWA1953 Volume 19 Issue 85 Pages 21-26
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe solution of the Oseen's equations has been obtained by Lamb, Oseen, Bairstow and others only in the cases of a sphere, and a circular or elliptic cylinder. And their methods cannot be applied to other forms of boundary. A new method proposed by Prof. Isao Imai of Tokyo University is epoch-making, being applicable to various boundaries in the two-dimmensional problem. In this report the author, using Imai's method, integrates the Oseen's equations in the case of the thin aerofoil of the symmetrical Joukowski type placed in the uniform viscous flow. And the unique solution, without necessity of any assumption such as Joukowski's hypothesis in the perfect fluid, is obtained only from the boundary conditions.View full abstractDownload PDF (711K) -
Hidesato ITO1953 Volume 19 Issue 85 Pages 26-32
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe first part of this paper gives the numerically exact solution of a laminar boundary layer for the case of u1=kxα when a large temperature difference exists across the boundary layer, under the assumptions that μ, λ∝T0-76 and σ=0.73. The relation between the pressure gradient and the laminar separation point was found. The second part of this paper gives an approximate method of solution of the laminar boundary layer along the surface of a two dimensional body which is kept at a constant temperature. The flow around a turbine blade and the flow around a sphere were treated as examples.View full abstractDownload PDF (922K) -
Goro KAMIMOTO, Yoshihiro MATUOKA1953 Volume 19 Issue 85 Pages 32-37
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSCavitation tests of the cylinder were performed in a small type cavitation tank, measuring the pressure distribution around the cylinder. The turbulence of the flow in the test channel was given by two kinds of grid with the square mesh. The cavitation tests showed that the characteristics of the cylinder i. e. the drag was affected by the turbulence of flow.View full abstractDownload PDF (1329K) -
Goro KAMIMOTO, Koichi HIRAI1953 Volume 19 Issue 85 Pages 37-43
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe tests of a model impeller of centrifugal type hydraulic machinery, which has 4 blades composed of logarithmic spiral with blade angle 30° and the inner- and outer radii respectively 150 mm and 300 mm, were performed under the measurement of the head, flowing quantity, flowing angle of exit of impeller and the pressure distribution around the blade. The flow in the impeller, especially the measured pressure distribution was compared with the theoretical ones.View full abstractDownload PDF (948K) -
Hidetoshi KUSAMA1953 Volume 19 Issue 85 Pages 43-49
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper, the author studied the stability of pump and its pipe line system, considering the characteristics of the prime mover, the inertia effect of liquid column and the lost head of liquid flow in the pipe. The rusults showed that the rising characteristic of pump was a necessary but not sufficient condition for the unstability of pump systems. And the position of delivery valve, the characteristics of pump and prive mover, and the characteristic values of the pipe line decide whether the system is stable or not.View full abstractDownload PDF (975K) -
Taijiro KASAI, Yasutoshi SENOO1953 Volume 19 Issue 85 Pages 49-53
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the papers already published the present writers suggested that the characteristics of a regenerative pump might be improved if the influences of the suction port could be removed. In this note and in the next one the developments of the study in the line, both theoretical and experimental, are reported with some results which verify the above-mentioned idea. In this note the cause of the influences of the suction port is studied : by proving that the influences of the immature development of the velocity profile are not sensitive and that the turbulence is not yet sufficiently developed in the pumping passage near the port, it is clarified that the uinsufficient turbulence is the source of those influences. In order to eliminate these effects, the position of the entry of the pumping passage should be moved toward down-stream. By doing so, the fluid is disturbed by the impeller and the turbulence is thus fully developed.View full abstractDownload PDF (794K) -
Taijiro KASAI, Yasutoshi SENOO1953 Volume 19 Issue 85 Pages 53-58
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the foregoing paper the cause of the influences of the suction port was studied and it was concluded that those influences came from the immature development of the turbulence in the pumping passage near the suction port. In order to eliminate these effects, the position of the entry of the pumping passage should be moved toward down-stream. In the present paper it is deseribed that the suction port of a pump is reformed into three kinds of forms and their characteristics are compared with each other. It is shown that a pump modified in a suitable manner has much better characteristics than an old type has : the maximum efficiency of the reformed pump is higer by about 9% and its suction-capacity is much larger than that of the old type. These results verify the idea mentioned in the foregoing paper.View full abstractDownload PDF (959K) -
Fumiki KITO1953 Volume 19 Issue 85 Pages 58-62
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSCalculation of pressure rise in the penstock of hydro-electric power-station, etc., has been made by the author, in which the effect of head loss due to friction together with the effect of draft-tube are taken into account. By solving an ordinary differential equation of Riccati's type, the following items have been investigated : (a) Effect of head loss due to friction upon the pressure rise, the guide-vane closure being made linearly with respect to time. (b) Effect of slight concavity or convexity of guide vane closure curve upon the pressure rise, the head loss due to friction being taken into account. (c) simple approximate formula giving the amount of pressure rise, in which the effect of head loss due to friction and effect of draft-tube are taken into account.View full abstractDownload PDF (672K) -
Fumiki KITO1953 Volume 19 Issue 85 Pages 63-67
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTheoretical value of pressure rise in a penstock of hydro-electric power station, where a surge tank is equipped, has been obtained. The surge tank of which the author has made a study of a riser pipe and surge tank body as shown in Fig. 1. The author has introduced an approximate formula for the max. pressure rise. Also the effect of draft-tube upon the pressure rise has been studied. Observed values of pressure rise at Hiraoka power-station, Tenryu River, have been compared with those obtained by calculation from author's formula, and it was found that both agree fairly well, at least in the sense of practical use.View full abstractDownload PDF (677K) -
Fumiki KITO1953 Volume 19 Issue 85 Pages 67-72
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe author discusses the pressure rise in a Hydro-electric Power Station equipped with a surge-tank of restricted-orifice type. Approximate formula for estimation of the amount of pressure rise due to restriction of bottom mouth of a simple surge tank is given.View full abstractDownload PDF (741K) -
Fumiki KITO1953 Volume 19 Issue 85 Pages 73-77
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe author discusses the theoretical ground for application of Gibson's method of measurement of discharge of a hydro-electric power station equipped with a surge tank of special type (see Fig. 1). This surge tank has a riser pipe of considerable length and the length of penstock is short. Four different methods were proposed and discussed, and it was decided that the fourth method, which records water pressure at a point of penstock directly in front of water turbine, and estimate the discharge by calculation, is most suitable for practical purpose. In Feb. and Oct. 1952, efficiency tests of water turbines at Hiraoka Hydro-electric Power Station (Tenryu River) were carried out on this principle, and fairly statisfactory result was obtained.View full abstractDownload PDF (691K) -
Masato HIROTSU, Hiroshi HYUGA, Yoshio OGAWA, Atsushi ITO, Kazue KONNO1953 Volume 19 Issue 85 Pages 77-83
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSWater stream at the guide vane exit of vertical shaft high speed type 3 KW model Francis water turbine was studied experimentally. For this purpose, four cylindrical Pitottubes were inserted parallel to the shaft at the guide vane exit, and measured the water velocity and its direction. Absolute, tangential and radial inward velocities were varied with water quantity in a straight line approximately. In the latter half of experiments, which are mainly refered to runaway speed, it was confirmed that the direction of water stream at runaway condition was not different from normal speed condition, as the assumption made to deduce the previously presented runaway speed calculation formula. It was also assured that in the high speed type Francis water turbine, there is some Ns division where there is no difference in the water quantity of runaway and normal speed condition.View full abstractDownload PDF (1158K) -
Minoru NAKAISHI1953 Volume 19 Issue 85 Pages 84-88
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSGear pumps have not been utilized for gear motors as they are not efficient. But recently their efficiencies have risen to almost 80%, so that they are now worthy to consider. A series of experiments of the hydraulic gear pump-gear motor system was done for a special kind of automobile. This paper shows the results of test and deals with practical use of the gear motor.View full abstractDownload PDF (691K) -
Einosuke MIKUMO, Jiunichi KOKADO1953 Volume 19 Issue 85 Pages 88-92
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this 1st report, the authors discussed the motion of accelerating period of one Qartz particle which moves by drag force of air stream in the horizontal glass pipe mathematically and experimentally for the first stage of the basic study of pneumatic stowing. In this experiment the velocities at the inlet and at the outlet of the pipe were assumed to be equal. In this agreement, the drag coefficients of the particles in the air stream were obtained from the sinking velocities of the particles in still water. By using the values of the drag coefficients, the motion phenomena in the air current in the glass tube were adequately explained, when the mechanical friction coefficient μ or the coefficient of resilience φ between the particles and the wall of the glass tube was properly selected by auxiliary experiments.View full abstractDownload PDF (853K) -
Ichiro TODOROKI, Kazuaki SHIRAMOTO1953 Volume 19 Issue 85 Pages 92-95
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSFor designing a Pitot sphere, the diameter (d) and the length (L) of the stem, and the diameter (d') of the stiffening rod are important dimensions. We explained the effects of the above dimensions on the Pitot characteristics. The Pitot sphere experimented has a brass sphere of 14.89 mm diameter (D) and the straight stem of 6.00 and 8.93 mm diameter respectively. The stiffening rods constisted of three concentric sleeves, sliding on the stem. The results of the experiment were as follows : (1) If L≩3D, L and d' have no effects on the characteristics. (2) The smaller the d, the better the characteristics of the Pitot sphere.View full abstractDownload PDF (659K) -
Taizo MURAKAMI, Setsuo FUKUNAGA1953 Volume 19 Issue 85 Pages 95-100
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSHitherto, many attempts to use an ordinary cyclone as a sieve for the classification of coarse and fine dust particles are found failure, as many fine particles will be separated with in the coarse. Our newly designed cyclone type classifier consists of the multistage upside down type cyclone using the air separating method by the upward air current and connecting in series to an ordinary type cyclone. Air borne feed is introduced in the upward direction into the multistage cyclone inlet. Here, the air current is changed to the whirl by the guide vanes so as to produce a cyclonic whirl. The tangential velocity of the rising air whirl increases, the dia. of inner exhaust pipe decreases. The coarse particles separate out into the lower separating chamber, while the finer particles collect into the individual upper chamber according to their sizes, and the finest is carried away in the outgoing air to ordinary type cyclone. Tests were carried out using the various kinds of dust particles, but in this paper, we present a test result concerning to the cement powder which is passed through a sieve of 200 mesh Tyler standard screen. To analize the sizing of the classified dust particle, we offered a new separating and classifing charactreistic curve instead of the weight frequency curve of the dust particle.View full abstractDownload PDF (996K) -
Sigezo IWANAMI1953 Volume 19 Issue 85 Pages 101-107
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSOn the theoretical treatment of the additional loss at the entry of a pipe through which viscous liquid flows slowly, no attempt has ever been undertaken by anyone, as far as the author's knowledge is concerned. Assuming the velocity distributions so as to satisfy the boundary conditions and equation of continuity, and treating this problem from the stand point of energy dissipation, the author succeeded in obtaining the equivalent length of additional loss at the entry Δli<0.444 d, and made some consideration in addition. By this result he could prove that the experimental value of the equivalent length of additional loss Δli=0.385 d determined by the author is not unpropriete.View full abstractDownload PDF (892K) -
Tamotsu TANAKA1953 Volume 19 Issue 85 Pages 107-114
Published: September 15, 1953
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn order to study the serious errors involved in the measurement of the viscosity of liquids by Engler or Redwood or Saybolt viscosimeter, fundamental experiments were carried out on the flows of liquids through some short tubes of different lengths, diameters and entrance shapes, under various conditions. From the results obtained, it is shown that the effects of the surface tension acting on the liquid surface at exit end of the tube and of the turbulence due to the entrance edge of it, perpendicular to its axis, cause the serious errors in the viscosity determination. To eliminate these errors, a new viscosimeter was designed. It consists essentially of a short tube whose entrance end is definitely well-rounded and exit end is immersed in the liquid the viscosity of which is to be measured in another vessel. It is evident by many tests that it is, by simple processes, not only capable of securing higher degree of accuracy than with other instruments above mentioned, but capable of measuring viscosity of any liquid without previous calibration.View full abstractDownload PDF (1263K)
- |<
- <
- 1
- >
- >|