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Tetsuo NISHIYAMA
1984 Volume 50 Issue 452 Pages
907-915
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Yoshiyuki TSUDA, Tatsuzo HIROSE, Hideo KIMOTO
1984 Volume 50 Issue 452 Pages
916-925
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Toshihiro TAKAMI, Kouzou SUDOU, Masaru SUMIDA
1984 Volume 50 Issue 452 Pages
926-934
Published: April 24, 1984
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Masaru SUMIDA, Kouzou SUDOU, Toshihiro TAKAMI
1984 Volume 50 Issue 452 Pages
935-942
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Manabu IGUCHI, Munekazu OHMI, Hiroshi NAKAJIMA
1984 Volume 50 Issue 452 Pages
943-950
Published: April 24, 1984
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Masaru MORIYA, Hiroshi SAKAMOTO, Mikio ARIE
1984 Volume 50 Issue 452 Pages
951-958
Published: April 24, 1984
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Tsutomu NOZAKI, Masahiro NAKASHIMA, Keiji HATTA
1984 Volume 50 Issue 452 Pages
959-966
Published: April 24, 1984
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Masaru KIYA, Kyuro SASAKI, Mikio ARIE
1984 Volume 50 Issue 452 Pages
967-973
Published: April 24, 1984
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Tsuneo AZUMA, Tatsuro HOSHINO
1984 Volume 50 Issue 452 Pages
974-981
Published: April 24, 1984
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Tsuneo AZUMA, Tatsuro HOSHINO
1984 Volume 50 Issue 452 Pages
982-989
Published: April 24, 1984
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Mitsunobu AKIYAMA, Shinichi TAKAMURA, K.C. CHENG, Michiyoshi SUZUKI, I ...
1984 Volume 50 Issue 452 Pages
990-998
Published: April 24, 1984
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Akira OGAWA
1984 Volume 50 Issue 452 Pages
999
Published: April 24, 1984
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Yutaka TSUJI, Yoshinobu MORIKAWA, Hiroshi SHIOMI
1984 Volume 50 Issue 452 Pages
1000-1008
Published: April 24, 1984
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Eiji HIHARA, Takamoto SAITO
1984 Volume 50 Issue 452 Pages
1009-1016
Published: April 24, 1984
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Ato KITAGAWA, Toshio TAKENAKA, Yuichi KATO
1984 Volume 50 Issue 452 Pages
1017-1026
Published: April 24, 1984
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Mitsuru FUJIWARA, Katsuhiko KASUYA, Tetsuzo MATSUNAGA, Makoto WATANABE
1984 Volume 50 Issue 452 Pages
1027-1033
Published: April 24, 1984
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Takao KAWAMURA, Munehiko HIWADA, Ikuo MABUCHI, Masaya KUMADA
1984 Volume 50 Issue 452 Pages
1034-1043
Published: April 24, 1984
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Takao SAITOH
1984 Volume 50 Issue 452 Pages
1044
Published: April 24, 1984
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Toshiro MAKINO, Ichiro SAKAI, Hirofumi KINOSHITA, Takeshi KUNITOMO
1984 Volume 50 Issue 452 Pages
1045-1053
Published: April 24, 1984
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Tatsuhiro UEDA, Sigeru TSUNENARI, Masayuki KOYANAGI
1984 Volume 50 Issue 452 Pages
1054-1061
Published: April 24, 1984
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Tetsu FUJII, Kousuke ODA
1984 Volume 50 Issue 452 Pages
1062-1066
Published: April 24, 1984
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Tomio SUZUKI, Ryoichi HIROSE, Kotaro MORIMOTO, Toru ABE
1984 Volume 50 Issue 452 Pages
1067-1076
Published: April 24, 1984
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Masashi KATSUKI, Yukio MIZUTANI, Byeong-Ryun CHOI, Etsuo SHIBATA, Kats ...
1984 Volume 50 Issue 452 Pages
1077-1087
Published: April 24, 1984
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Norihiko YOSHIKAWA, Chiaki NIWA, Kazutomo OHTAKE
1984 Volume 50 Issue 452 Pages
1088-1094
Published: April 24, 1984
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Norihiko YOSHIKAWA, Susumu NAGANO, Kazutomo OHTAKE
1984 Volume 50 Issue 452 Pages
1095-1104
Published: April 24, 1984
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Masaru OGURA, Susumu DAIDOJI
1984 Volume 50 Issue 452 Pages
1105-1113
Published: April 24, 1984
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Hiroyuki KIDO, Yutaro WAKURI, Eiichi MURASE, Katsuya FUJIMOTO, Zhimin ...
1984 Volume 50 Issue 452 Pages
1114-1121
Published: April 24, 1984
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Masaru KIYA
1984 Volume 50 Issue 452 Pages
1122-1125
Published: April 24, 1984
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Tsuneo AZUMA, Tatsuroh HOSHINO
1984 Volume 50 Issue 452 Pages
1126-1135
Published: April 24, 1984
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The radial flow of a thin liquid film, formed by water discharge from a small cylindrical opening between a circular nozzle and a horizontal plate, is studied experimentally. The velocity profile in a thin liquid film was measured with the aid of Laser Doppler Velocimeter. The results showed that a boundary layer gradually grows in the downstream direction and finally whole flow merges into boundary layer, and that the transition from laminar to turbulent occurs when the discharge Reynolds number is large. The experimantal results of the process of the flow development were compared with the theoretical values calculated by means of boundary layer theory.
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Tsuneo AZUMA, Tatsuroh HOSHINO
1984 Volume 50 Issue 452 Pages
1136-1143
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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The occurence of the instability of a radial flow of thin liquid film is investigated. Two regions of flow field were considered. The one is the region in which a boundary layer grows in a downstream direction, and the other is the region in which the whole of the flow is a boundary layer. For the former region, Orr-Sommerfeld equation was solved numerically by means of the modified Kaplan method, with the assumption of Blasius's and of Watson's velocity profile. For the latter, O-S equation was replaced by a difference system, and solved taking account the free surface condition for Blasius's and Watson's profile. In experiments, the wall pressure was measured, which was followed by spectral analysis. The pressure fluctuation frequency due to the disturbance wave was compared with the linear stability theory.
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Kenichi ITO, Naoshi MATSUMOTO, Mitsuo KAJI, Masami KOYAMA
1984 Volume 50 Issue 452 Pages
1144-1151
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Stability of wake flames formed behind a bluff-body with fuel injection slits was investigated experimentally in various shape of two dimentional bluff-bodies such as cylinders with 10-20 mm diameters, hemi-circle, 60°wedge and rectangular pillars with 12.5 mm width. The buff-body was fitted in an air stream ranging 5-60 m/s. Fuels used were propane, methane, ethylene and butane. Flame stability limits, lengths or shapes of recirculation zone, distributions of chemical species concentration, temperature and equivalence ratio in the zone were measured. The results show that an equivalence ratio in the recirculation zone is important in determining the flame limit. The air velocity at blow off is inversely proportional to the square root of the bluff-body width, and is independent on the direction of fuel injection and the shape of flame holder except rectangular pillar.
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Shigeyasu NAKANISHI, Masuo KAJI, Shoji YAMAUCHI, Yoichi KAZUOKA, To'or ...
1984 Volume 50 Issue 452 Pages
1152-1158
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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A new model which well explains the stochastic characteristics of the dryout phenomenon observed on evaporating tubes is proposed. In this model, the dryout region is intermittently quenched by liquid fed by the disturbance waves arrived at this region and suffers rather random wet-dry cycle, which causes the wall temperature fluctuations. In order to prove validity and usefulness of this model, a Monte Carlo simulation study is conducted at the condition corresponding to a typical run of our experimental data reported in our previous paper. The power spectra of the wall temperature fluctuations are well approximated by our model, which shows its superiority to the rivulet model. Some properties of our simulation model are also examined.
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Koji AKAGAWA, Terushige FUJII, Shigeo TAKAGI, Masaru TAKEDA, Kouichi T ...
1984 Volume 50 Issue 452 Pages
1159-1165
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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The development of an expander with high efficiency using a low-quality vapor-liquid mixture as the working fluid is very important from the view point of effective utilization of water dominated geothermal resources and waste heat sources from factories. The fundamental performance characteristics of a Hero's turbine, which is a radial outflow reaction turbine, have been investigated experimentally using an air-water two-phase mixture as the working fluid. Small scale models of the Hero's turbine, which incorporate a 200 mm dia. disk with three nozzles, were tested in the range of G
t=0.6 to 1.2 kg/s and G
g=0 to 12.4×10
-3 kg/s. The effects of air flow rate, water flow rate, and quality on the efficiency and each loss have been discussed. Furthermore, the two-phase flow configuration in the passage of turbine was observed.
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Akira NARUMI, Seizo KATO, Ko TERADA, Ryotaro IZUMI
1984 Volume 50 Issue 452 Pages
1166-1172
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Heat transfer characteristic in turbulent flow over a flat plate having finite width is experimentally studied with emphasis on the promotion of heat transfer caused by the edge effect due to the secondary flow at the plate corner. The measurements under the condition of uniform heat flux are performed for the geometries of finite widths w=60∼360 mm and of finite thicknesses 2h=10∼40 mm. The relatively great promotion of heat transfer is always obtained at the side edge region of finite width and it depends mainly on plate thickness. The local heat transfer coefficient in the lateral direction is well expressed by the empirical formulae of Eqs. (3)∼(6) with plate thickness as a parameter. The formulae for the mean heat transfer coefficients are also established by the set of Eqs. (7)∼(10).
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Tamotsu IGARASHI
1984 Volume 50 Issue 452 Pages
1173-1181
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Experimental investigations on the fluid flow and heat transfer around a square prism at angles of attack were carried out in the range of subcritical Reynolds numbers. The average heat transfer coefficients at angles of 0°and 45°were about 40% higher than the result of Hilpert. Characteristics of the average and local heat transfer were made clear for flow patterns in connection with the flow characteristics. The average heat transfer coefficient has a minimum value at 13°, then has a maximum value at 20°∼25°. And the average heat transfer coefficient on rear surface of the prism is given by the rms values of the pressure fluctuations regardless of the attack angles.
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Tomio SUZUKI, Ryoichi HIROSE, Kotaro MORIMOTO, Toru ABE
1984 Volume 50 Issue 452 Pages
1182-1189
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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The Combustibility of a COM, a Pulverized coal and a heavy oil was studied for high temperature furnaces in the steel industry. Combustion efficiency was measured in a furnace with 1 m diameter and 4 m long tunnel, a thermal input of 40×10
4 kcal/hr, a furnace temperature of 1300°C and a combustion air temperature of 150∼450°C. COM and pulverized coal combustion cause a rapid main reaction and a slow char reaction. The char reaction determines the burn-out point of the fuel. The efficiency of COM containing coal is as high as that of heavy oil. The efficiency of COM containing petroleum coke is lower, because coke combustion produces much char. The efficiency of coal is much lower than that of other fuels by 20∼50 percent in the main reaction, and ignition is delayed. The increase of the combustion air temperature and the velocity, the upper movement of the fuel injection position promote the main reaction and improve efficiency.
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Hakaru SAITO, Ikuo TOKURA, Koki KISHINAMI, Shigehiro UEMURA
1984 Volume 50 Issue 452 Pages
1190-1196
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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The observation of the frosting process in an early stage of the deposition revealed that, in the range of our experiments, the process begins with the condensation of water vapor on the wall in the form of supercooled liquid water droplets. From these observations, it was clarified that the frost density is affected by the number density of the frost nuclei and that the formation of frost nuclei depends on the heat and mass transfer conditions. Consequently, the dimensional analysis was carried out to find the dimensionless parameters which correlate the thermal conductivity of a frost layer. The experiental results of the density and the thickness of the frost layer were correlated fairly well by the parameters introduced by the dimensional analysis for the cases of frost formations on the vertical plate and the horizontal cylinders in an array in free convection.
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Mitsu AKIYAMA, Masami SUZUKI, K.C. CHENG, Michiyoshi SUZUKI, Ichiro NI ...
1984 Volume 50 Issue 452 Pages
1197-1204
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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Experimental and numerical investigations have been made on laminar convective heat-transfer in thermal entrance region of curved tubes. In heat transfer experiment, the parameters are set to be D
e=100∼2000 and R
eR
a≤6×10
4 for non-buoyant effect, while mixed effects of buoyant and centrifugal forces are examined by increasing the value of R
eR
a upto 1×10
6 keeping D
e=100. The secondary flow pattern in the mixed convection region are visualized. Numerical calculation of the set of three dimensional parabolic type equations is extended over the ranges of D
e=20∼1000 and R
eR
a=0∼5×10
6 for P
r=0.7. The case with P
r=5 is also examined. Differences between cooling and heating of water are explained taking account of the temperature dependence on viscosity. Flow behavior of the results reveals the special characteristics of thermal entrance and hydrodynamic entrance regions which can be categorized into three types. A set of correlations suitable for the three indivisual heat transfer regions is proposed for thermally fully developed region.
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Akira NISHI, Teruo SAWADA
1984 Volume 50 Issue 452 Pages
1205-1211
Published: April 24, 1984
Released on J-STAGE: March 28, 2008
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To obtain the basic data for assuming the source position of jet engine exhaust plume, a full scale field test was done at Chitose Airport, to make use it in the air pollution assessment of the proposed New Kansai Airport. An engine of airbus (Rolles Royce RB211-22B) was examined for a few engine operation modes. An observation net of about 100 meters width and 25 meters hight was constructed perpendicular to the jet axis, instrumented at several levels with sensors for velocity, temperature and concentration of pollutants. A model test was carried out in the laboratory to examine the effect of engine height and the both results were compared with each other. The bending of jet axis by the crosswind is determined and a penetration length is estimated. The decay of maximum velocity and temperature as well as the jet dispersion scales is also determined.
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