Transactions of the Japan Society of Mechanical Engineers Series B

Online ISSN : 1884-8346
Print ISSN : 0387-5016

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Volume 49, Issue 446

Displaying 1-26 of 26 articles from this issue

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The Effect of Gas Density on Turbulent Diffusion in Free Jet

Masakazu YAMAZAKI, Shinzo HIRASAWA, Nobuo KIDO, Masaaki OHYA, Katsuya ...

1983 Volume 49 Issue 446 Pages 2043-2052
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2043

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Velocity Distributions, Near the Exit of the Centrifugal Pump Impellers

Koji KIKUYAMA, Mitsukiyo MURAKAMI, Eiji ASAKURA, Natsuo KANZAKi

1983 Volume 49 Issue 446 Pages 2053-2061
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2053

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Numerical Analysis of Pneumatic Capsule Pipeline System by the Method of Characteristics : Continuous Loading under a Constant Cycle

Yuji TOMITA

1983 Volume 49 Issue 446 Pages 2062-2068
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2062

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Flow in a Spiral Tube : 1st Report, Velocity Distribution and Pressure Drop

Keizo WATANABE, Touichi MAEDA, Toshiyuki IWATA, Hiroshi KATO

1983 Volume 49 Issue 446 Pages 2069-2077
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2069

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Influence of Melting Process on Mixing and Kneading Action of Twin Screws

Tadamoto SAKAI

1983 Volume 49 Issue 446 Pages 2078-2085
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2078

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Effect of Cone Angle at Draft Tube Inlet on Hydraulic Characteristics of Francis Turbine

Takashi KUBOTA, Setsuo YAMADA

1983 Volume 49 Issue 446 Pages 2086-2093
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2086

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Evaluation of Dynamic Pressure Due to Steam Condensation in Water and Multi-Vent Effects

Mutsuhiro ARINOBU, Isamu SUZUKI

1983 Volume 49 Issue 446 Pages 2094-2101
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2094

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Vortex Excited Oscillation of a Circular Cylinder

Masataka SHIRAKASHI, Shinji UENO, Yasuhiro ISHIDA, Syoichi WAKIAYA

1983 Volume 49 Issue 446 Pages 2102-2110
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2102

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A Proposed Model of Mist Formation in Turbulent Convection

Toshiaki KUMADA, Katsuhiko SAGAE, Ryoji ISHIGURO

1983 Volume 49 Issue 446 Pages 2111-2118
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2111

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A Study on the Measurement of Bubble Size Distribution in the Upward Bubbly Flow

Shigeru HINATA

1983 Volume 49 Issue 446 Pages 2119-2127
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2119

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Heat and Mass Transfer from Spheres in Circular Free Jets : 1st Report, Stagnation-Point and Average Transfer

Kahoru TORII, Toshiyuki AMANO

1983 Volume 49 Issue 446 Pages 2128-2136
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2128

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Heat and Mass Transfer from Spheres in Circular Free Jets : 2nd Report, Local Transfer Coefficients

Kahoru TORII, Toshiyuki AMANO

1983 Volume 49 Issue 446 Pages 2137-2146
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2137

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Combined Conductive and Radiative Heat Transfer in an Optically Thick Ceramic Porous Body : In the Case of Cordierite Porous Body

Kouichi KAMIMOTO, Yasuyuki MIYOSHI, Izumi KINOSHITA, Shu HASEGAWA

1983 Volume 49 Issue 446 Pages 2147-2153
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2147

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Heat Transfer in a Parallelogram Shaped Enclosure : 4th Report, Combined Free Convection, Rediation and Conduction Heat Transfer

Yutaka ASAKO, Hiroshi NAKAMURA

1983 Volume 49 Issue 446 Pages 2154-2162
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2154

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Heat Transfer of a Single Horizontal Tube in a Fluidized Bed : Maximum Heat Transfer Coefficient and Optimum Velocity

Yusumi NAGAHASHI, Naomichi HIRAYAMA

1983 Volume 49 Issue 446 Pages 2163-2171
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2163

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Transient Freezing Heat Transfer of Flowing-Fluid in Parallel Plates

Nobuhiro SEKI, Syoichiro FUKUSAKO, Junidhito Tanaka, Kimito Itoh, Tosh ...

1983 Volume 49 Issue 446 Pages 2172-2180
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2172

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Microscopic Study of Dropwise Condensation

Takaharu TSURUTA, Hiroaki TANAKA

1983 Volume 49 Issue 446 Pages 2181-2189
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2181

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An Experimental Study on Small Scale Vapor Explosions in Stationary Molten Tin-Flowing Water System

Niro TAKAKI, Masahiro SHOJI

1983 Volume 49 Issue 446 Pages 2190-2199
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2190

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A Method for Numerical Analysis on Interaction Factors of Photochemical Smog Formation with Pollutant Transfer in HC-NO_x Reaction System

Fumitake CHISAKA

1983 Volume 49 Issue 446 Pages 2200-2208
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2200

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Methylnitrite Formation in Effluent Gases from a Methanol Fueled Engine

Kenichi ITO, Toshiaki YANO, Takashi OHKUBO, Youko KIMURA

1983 Volume 49 Issue 446 Pages 2209-2217
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2209

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A New Measuring Method of IMEP Variance of an Engine Utilizing an Accurate Revolutional Speed Detector

Toshiaki KONOMI

1983 Volume 49 Issue 446 Pages 2218-2223
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2218

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The Flow Through the Curved Pipe with the Ellipic Cross Section

Toshihiro TAKAMI, Kouzou SUDOU

1983 Volume 49 Issue 446 Pages 2224-2229
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2224

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he fully-developed flow of incompressible fluid through the curved pipe with the elliptic cross section has been investigated analytically and experiment1ly. The velocity profiles of the main flow and the flow pattern of the secondary flow are made clear by the numerical analysis. Also, the studies are conducted on the effects of the shape of the cross section upon the friction coefficient, important in the industrial engineering. The experiments are executed by flowing water through the curved pipe with the elliptic cross section. The experimental results of the pressure drop are compared with the analytical results. The approximate expression of the friction coefficient, which is taken account of the aspect ratio and the tube pitch, is presented on the basis of the analytical and experimental results.

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The Turbulent Shear Flow on a Rotating Cylinder in a Quiescent Fluid

Ikuo NAKAMURA, Yoshinori UEKI, Shintaro YAMASHITA

1983 Volume 49 Issue 446 Pages 2230-2235
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2230

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An experimental study has been performed on the structures of the mean flow and turbulent fields around a cylinder spinning in a quiescent fluid. Two kinds of cylinders, each different in diameter, have been used in this experiment. Measured mean velocity profiles are found not to obey the conventional logarithmic law at all. Instead, they are satisfactorily expressed by the different law of the wall, logarithmic law and defect law, deduced in this study, from those of the flat-plate turbulent flow. A gradient Richardson number computed from the mean flow data is always negative and reaches its minimum value -0.5 in the middle region of the shear layer. In the outermost part of the layer, the mean velocity behaves as 1/γ although the flow is turbulent ; this behaviour can be inferred from the defect law representation. Discussion is made about the balances of the radial mean momentum and the turbulent kinetic energy.

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Water Hammer in the Circulating Pipe Line with Pressure Vessels

Eiji KATO, Minoru SUITA, Masaaki KAWAMATA, Masumi YUDA

1983 Volume 49 Issue 446 Pages 2236-2241
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2236

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Studies have been made to compare and discuss the analytical solutions solved by the method of characteristics with the experimental results on the water hammer. The measurements have been carried out using the l/6 scale model of the primary coolant system of the experimental fast breeder reactor "JOYO" belonging to Power Reactor and Nuclear Fuel Development Corporation. The water hammer has been taken place, at the flow velocity 0.5 and 1.0 m/sec, with closing slowly the flow control clap valve in the time ranges 4.5∼9.6 seconds and 4.6∼11.2 seconds respectively. Qualitative agreement was found between the analytical and experimental results. And the calculation gave the safety value at the peak pressure. Therefore the calculation models and idea used in this paper have sufficient practical value.

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Slip Factor Dependence on Flow Rate in Centrifugal Compressors

Yujiro SAKAMOTO

1983 Volume 49 Issue 446 Pages 2242-2247
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2242

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Slip factor dependence on flow rate was investigated using a new technique, to estimate mean flow condition at the inlet of vaneless diffuser. The characteristics of Slip Factor dependence on flow rate was found to change depending whether the centrifugal compressor went into choking condition or not in the normal operation range. Also impeller was found to be affected by vaned diffuser changing the rotor speed at inducer choke occurrence and blockage factor at inducer throat at that time depending on the throat area of the vaned diffuser.

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Optimum Value Operation in Waterhammer

Katsuhiro YAMAMOTO

1983 Volume 49 Issue 446 Pages 2248-2253
Published: October 25, 1983
Released on J-STAGE: March 28, 2008

DOIhttps://doi.org/10.1299/kikaib.49.2248

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In order to clarify fundamental aspects of the optimum valve operation to suppress pressure rises in waterhammer, two typical problems are studied for a single pipe line system without loss. One is the case how to close a valve minimizing the maximum pressure in a specified valve closing time, and another is the case minimizing a valve closing time for a specified maximum pressure. The problems are solved by graphycal method based on characteristics theory. As the results for the above two problems case the optimum valve movements and simple formula between valve closing time and the maximum pressure are derived. In addition the solution is improved for the similar problem proposed by Streeter, i. e. the valve stroking.

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