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 174
Displaying 1-13 of 13 articles from this issue
- |<
- <
- 1
- >
- >|
-
Eiiti HORI1961 Volume 27 Issue 174 Pages 167-173
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSA theory is presented for the calculation of unsteady laminar boundary layers in an incompressible fluid about a two-dimensional body. Fluid velocity in the main stream just outside the boundary layer, expressed as a power series of the distance x measured along the body surface, is assumed to fluctuate about its mean value. The magnitude and frequency of the fluctuation are assumed to be small. Velocity fluctuation in the boundary layer is also expressed as a power series of x, whose coefficients are functions of the non-dimensional distance measured normal to the surface. These coefficient functions are universal and can be tabulated once and for all. Functions corresponding to the main stream velocities of third order polynomial and frequencies up to second order are actually computed and tabulated. As an example, the movement of the boundary layer separation point on a circular cylinder is calculated. The movement, although it increases with frequency, is rather small.View full abstractDownload PDF (725K) -
Tsuyoshi HATTORI, Rikuo SOGI, Akira TAMAI1961 Volume 27 Issue 174 Pages 175-183
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper reports the experimental studies of the powder extrusion of the Polyvinyl Chloride. The discharge characteristics were measured with the four screws which had different compression ratio to each other. At the same time, the tensile strength of the extruded samples was also measured to examine the influence of the screw shape, its revolutions and the resistance of the dies upon the kneading effects of the products.View full abstractDownload PDF (915K) -
Yukio TOMITA1961 Volume 27 Issue 174 Pages 184-190
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTreating on the basis of the idea of the boundary layer, the frictional resistances of a rotating disk in non-Newtonian fluid of infinite extension are approximately found by using the momentum equations in both cases of the laminar and turbulent boundary layer flows. As a result or these analytical treatments, it has been revealed that the relation between the Reynolds number Re* and the resistance coefficient CM of a rotating disk in non-Newtonian fluids having different values of the rheological constant n is identical with that between Re and CM of the rotating disk in Newtonian fluid.View full abstractDownload PDF (653K) -
Yasuo YAMASAKI1961 Volume 27 Issue 174 Pages 190-199
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper, calculating method of heat-absorption in boiler-furnace is derived by developing the theory described in the previous report. This method is derived basing on the area ratio AF/AW of flame to furnace and the summary of the calculating process as follows : Radiation constant CF can be evaluated from the value AF/AW for a given combustion intensity. Correction factor f for the value of AF CF can be obtained for a given theoretical flame temperature. On calculating the gas temperature at the furnace outlet, first assume the value, then conversion factor K for the mean flame temperature is given. Using [numeical formula](B : fuel consumption, Hu : low heating value of fuel), gas temperature leaving furnace can be easily found by the aid of a monogram, and the above process should be repeated until the value obtained agrees with the one assumed.View full abstractDownload PDF (986K) -
Sugao SUGAWARA, Itaru MICHIYOSHI, Chusuke TAKAHASHI1961 Volume 27 Issue 174 Pages 200-205
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSContinued from the first report, in which the combustion gas flow throush a single chamber was analyzed, this paper presents the theory of gas flow through a typical annular combustion chamber of gas turbine or jet engine by using the thermo-aerodynamical analysis. By one numerical calculation, it was quantitatively shown that : (1) the cooling air which flows the outer space of annular combustion chamber enters naturally into the inner space throush the mixing holes by the pressure difference between outside and inside and (2) it prevents the increase of temperature of combustion gas and it promotes the increase of gas velocity, while it makes the large pressure drop by mixing in addition to that by friction and expansion.View full abstractDownload PDF (622K) -
Yoshiro OTSUKA1961 Volume 27 Issue 174 Pages 206-212
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe purpose of this paper is to find out the scale effects of the premixed flame of propane gas-air mixture, which is made in the mixing tubes with air holes arranged in a single row. The experimental results are as follows : The logarithm of the heat release increases linearly with decreasing the inverse Reynolds number ν1/DU1 (D : inner diameter of the mixing tube, U1 : mean velocity of the air flow in the mixing tube, ν1 : kinematic viscosity of the air in the mixing tube). The elongation of the straight lines indicates that the heat release attains to the lower calorific value at a certain Reynolds number. These Reynolds numbers and the slopes of the straight lines decrease monotonously with decreasing diameter of the mixing tube except for the range of about 20∼40 mm of the diameters of mixing tube. The Reynolds numbers decrease with the increase of the air-fuel ratio. The slopes are not affected by the air-fuel ratio except for the range of about 20∼40 mm of the diameters of mixing tube.View full abstractDownload PDF (864K) -
Yasusi TANASAWA, Nobuki NAGAI, Masahiko UMEHARA1961 Volume 27 Issue 174 Pages 213-220
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSInstead of the vaporizing combustor of the externally heated type, a very simple internal vaporizing combustor of high combustion intensity has been investigated, using a combustor consisted of an air blown atomizer and a cylindrical tube. As shown in Fig.5, the combustion characteristics concernins the mixture ratios have revealed the exsistence of three regions. As it requires much flow rate at the time of ignition, the fuel spray burns at the outside of the cylindrical tube in a yellow flame. This yellow flame region exists at the right hand side of the line 3. But if the flow rate of fuel is decreased gradually, the flame enters into the inside of the cylinder, accompanying a kind of intermittent explosion, called "Bumping". The bumping region lies between the line 2 and the line 3. When the flow rate of fuel is further decreased, a blue flame combustion of very high intensity of 108 kcal/m3·h·atm happens at a place between the line 1 and the line 2. At the left hand side of the line 1, the mixture is too weak to burn.View full abstractDownload PDF (1320K) -
Yasusi TANASAWA, Nobuki NAGAI, Masahiko UMEHARA1961 Volume 27 Issue 174 Pages 221-230
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe mechanism of intermittent explosion, called "Bumping", has been studied with a microphone to catch the combustion noise, with a probe to detect the ions produced at the reaction zone, and with a high speed camera to grasp the movement of the flame. From these results the mechanism of bumping can be explained as follows. : Near the injector, an flammable mixture is always produced at the boundary of the atomizing air and the fuel drops, but the velocity of the mixture is too high to hold the flame. So, if the mixture once explodes, the velocity or the gas in the combustor becomes too high to maintain the flame, and the concentration of fuel becomes too rich to ignite. After 1/50-1/5 s, the flame held at the exit of the combustor flashes back into the combustor, as the velocity of gas decreases below the propagation velocity of flame and the concentration decreases with the fresh incoming mixture from the injector within the flammable limit. Thus the next intermittent explosion takes place.View full abstractDownload PDF (2455K) -
Akira KOBAYASHI, Hiroshi OOTA1961 Volume 27 Issue 174 Pages 231-239
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe ignition performance can be estimated by measuring the ignition ratio in lean mixtures of combustible gases. It can be seen that emitting of β rays from radio-isotope Fe55-59 into the sparkgap or electric ignition apparatus with battery, the degree or scattering of ratios decreases and then the ignition performance becomes more uniform and stronger. When electric discharge energy is doubled, the molecular concentration of the critically lean mixture, consisting of kerosene or decalin decreases only by 3.7∼9.4%. By emitting β radiation, however, the concentration lowers by 20.7% in maximum. As the electric discharge energy decreases, the rate of decrease in molecular concentration becomes larger, and it is approximately in proportion to logarithmic counting rates of the radiation sources. Since effects of radiation on the chemical reaction can be almost neglected in our poor radioactive sources, the authors examined the electric discharge characteristics of the ignition system using a synchroscope. The β rays decrease 30∼35% of sparking voltages and increase the maximum spark gaps of the ignition coil, and then the capacity component of coil energy decreases and the induction component has been changed. In our experiments it may be considered that the induction component succeeding the capacity component is remarkably effective to ignition.View full abstractDownload PDF (1056K) -
Shoichi FURUHAMA, Tosio TADA1961 Volume 27 Issue 174 Pages 240-247
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe following terms are necessary for theoretical quantitative study of gas leakage through the piston-rings of internal combustion engine ;(1) the discharge coefficient through the narrowest gas passage, (2) the temperature of gas in the space between two rings. So at first the former is measured by mesan of flowins out of the high temperature compressed air through a gap of piston-ring set in the experimental apparatus. Next, the latter is studied using the apparatus provided with a stationary piston and a reciprocating cylinder. As a result, the following facts are obtained, : (a) the discharge coefficients are 0.8∼0.9 and its mean value is about 0.86 when the states of leakage gas are near to those of actual working engine, (b) the temperature of gas flowing out around the piston-rings almost equal to that of gas on the surface of piston.View full abstractDownload PDF (1089K) -
Shoichi FURUHAMA, Tosio TADA1961 Volume 27 Issue 174 Pages 247-255
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe measuring values of the discharge coefficient and the temperature of the gas flowing through the piston-rings which were obtained in 1st Report, are used to calculate the amount of the leakage gas and its pressure distribution under several conditions of the piston-rings. And comparing these calculated results with the previous experimental results, the following results are obtained ;(1) the calculation and experimental values are consistent in results, (2) the mechanism of the gas leakage through the piston-rings corresponds to that of the gas flows through the labyrinth, changing rapidly its properties, (3) especially, the unsteadiness of leakage flow produces an interesting effect upon the gastightness, (4) and it is also proved that the leaked sas hardly contains combustion as when estimated from the theoretical calculatio.View full abstractDownload PDF (913K) -
Shunichi OHIGASHI, Yukio KASHIWADA1961 Volume 27 Issue 174 Pages 255-261
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThis paper reports the investigation on the scavenging process in a model cylinder having a cross-scavenging system. The movement of the scavenging front in the cylinder ana the shortcircuiting of fresh charge were recorded by an electronic method(1). Hence the profile of the scavenging front was made clear. The port arrangement investisated gives a "flat scavenge", pattern and an early short-circuiting occurs at the exhaust ports located near the scavenging ports and the fresh charge leaves the upper part in the exhaust side unscavenged.View full abstractDownload PDF (738K) -
Takeshi KOBORI1961 Volume 27 Issue 174 Pages 261-264
Published: February 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDownload PDF (483K)
- |<
- <
- 1
- >
- >|