Turbomachinery
Online ISSN : 1880-2338
Print ISSN : 0385-8839
ISSN-L : 0385-8839
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Volume 41, Issue 6
Displaying 1-4 of 4 articles from this issue
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Technical papers
  • Torque Converter Internal Flow Analysis in Consideration of Dynamic Behavior
    Takeshi YAMAGUCHI, Kazuhiro TANAKA
    Article type: Technical papers
    2013 Volume 41 Issue 6 Pages 355-360
    Published: 2013
    Released on J-STAGE: June 13, 2015
    DOIhttps://doi.org/10.11458/tsj.41.355
    JOURNAL FREE ACCESS
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    The objective of this research was to investigate the transient torque converter performance used in an automobile. A new technique in computational fluid dynamics was introduced, which includes the inertia of the turbine in a three dimensional simulation of the torque converter during a launch condition. The simulation results were compared to experimental data. Good agreement between test and simulation was seen across the range of data. In addition, the flow structure inside the torque converter was visualized and compared to the result from a steady-state calculation.
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  • Decrease of Micro Pulsation in the Reciprocating Type Pulsation Free Pump
    （2nd Report：Inspection of the Micro Pulsation Adjustment Mechanism）
    Yoshiaki KONISHI, Akinori FURUKAWA
    Article type: Technical papers
    2013 Volume 41 Issue 6 Pages 361-367
    Published: 2013
    Released on J-STAGE: June 13, 2015
    DOIhttps://doi.org/10.11458/tsj.41.361
    JOURNAL FREE ACCESS
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    The reciprocating type pulsation-free pump generates whit pulsation by a change of the discharge pressure. The conventional measures were accompanied with the cams. Because the pulsation was caused by a decline of the pump volume efficiency due to the pressure and disagreement of the quantity of volume revision, the mechanism to adjust pulsation easily by establishing the pulsation corrective is proposed in the present paper and is confirmed by an examination.
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  • Parameter Design for a Rocket Turbopump Turbine
    （3rd Report：Multi-Objective Optimization of a Rocket Turbopump Turbine Considering the Turbine Characteristics（i.e., Rotor Weight, Blade Stress, Avoidance of Blade Resonance and Thomas Force））
    Junya TAKIDA, Taro FUKUDA, Ryoichi UYAMA, Kenichi FUNAZAKI, Masaharu U ...
    Article type: Technical papers
    2013 Volume 41 Issue 6 Pages 368-377
    Published: 2013
    Released on J-STAGE: June 13, 2015
    DOIhttps://doi.org/10.11458/tsj.41.368
    JOURNAL FREE ACCESS
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    Because rocket turbopump turbine blades have higher loading, there is a possibility of shaft vibration problem due to “Thomas Force”. In order to reduce shaft vibrations, it is important to keep “Thomas Force”small, In the previous report, validity of optimization process for the reduction of Thomas Force was confirmed by performing Parameter Design and Multi-Objective Genetic Algorithm(MOGA). In this paper, by increasing the number of objective functions, the results of multi-objective optimization for reduction of Thomas Force and the considering the feasibility of blade structure are discussed. It was found that optimized blade reduced 10％in weight, 30％in Thomas Force, compared from the original blade.
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  • Numerical Analysis of Wind Turbine Characteristics Using Two-Dimensional CFD and BEM
    Masahiro FUTAMI, Masami SUZUKI, Kazumasa AMEKU
    Article type: Technical papers
    2013 Volume 41 Issue 6 Pages 378-383
    Published: 2013
    Released on J-STAGE: June 13, 2015
    DOIhttps://doi.org/10.11458/tsj.41.378
    JOURNAL FREE ACCESS
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    On a design and analysis method of wind turbine generators, Blade Element Mo-mentum(BEM)theory has been often used even now. BEM theory only requires a small computa-tional load. However, the measurement facilities such as wind tunnel experiments with two-dimensional airfoils are necessary because BEM theory uses two-dimensional airfoil performance. To find the two-dimensional airfoil performance at relatively low cost, calculation using Compu-tational Fluid Dynamics(CFD)is performed. In recent years, CFD analysis associated with de-velopment of computers becomes high speed and high performance. In this study, an analysis method of wind turbine performance using the conventional BEM theory and two-dimensional CFD is described and compared with experimental results. As a result, it was shown that the analysis method predicts the wind turbine performance with the practical accuracy.
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