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Basic Investigation on Rotating Cavitation

Research Project

Project/Area Number 06452175
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionOsaka University

Principal Investigator

TSUJIMOTO Yoshinobu  Osaka University, Professor, 基礎工学部, 教授 (50112024)

Co-Investigator(Kenkyū-buntansha) YOKOTA Kazuhiko  Osaka University, Research associate, 基礎工学部, 助手 (70260635)
SATO Kotaro  Osaka University, Research associate, 基礎工学部, 助手 (80252625)
YOSHIDA Yoshiki  Osaka University, Associate Professor, 基礎工学部, 助教授 (80240836)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1996: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥6,400,000 (Direct Cost: ¥6,400,000)
KeywordsROTATING CAVITATION / MASS FLOW GAIN FACTOR / INDUCER / CAVITATION COMPLIANCE / PROPAGATION / 伝播速度比 / 非定常圧力 / 翼列 / マスフローゲインファクター / 旋回速度比 / 不安定
Research Abstract

This support enabled us to carry out three types of experiments and five types of theoretical analyzes, each of them resulting in valuable contributions for the understanding of rotating cavitations.
As the first step of experiments, a scale model of LE-7 LOX inducer and a cavitation tunnel were built and cavitation instabilities including rotating cavitation and cavitation surge were observed in a wide rnage of operating conditions. This resulted in a map of those instabilities in the suction performance chart. In addition, the propagation of cavity from one blade to another could be visualized from a casing wall unsteady pressure measurement combined with a data acquisitions system newly developed for this purpose.
The cavitation in a two dimensional transient tip leakage flow was observed as a basic study of tip leakage cavitation. It was found that the growth of cavitation can be simulated by a 2-D vortex calculation if the cavity growth effect is properly incorporated in the calcula … More tion. Based on this calculation, we are planning to build a 3-D tip leakage cavitation model which can be used to evaluate the unsteady characteristics of tip leakage cavitation.
To evaluate the unsteady characteristies of blade surface and tip leakage cavities, and oscillating foil test device was built. As a preliminary experiment, a cavitation test with fixed foil has been finished. It was found that a higher frequency cavitation instability occurs as well as the conventional partial cavitation instability. This device will be used to study the cavitation instability problems as well as the original purpose.
It was found by a non-linear simulation of rotating cavitation that the increase of cavitation compliance due to decrease of inlet pressure is a factor to the determine the amplitude of rotating cavitation. Three-dimensional actuator disk analyzes between two parallel plates or between two concentric circular cylinders showed that the 3-D effects of the geometry and cavity have little effects on fundamental span wise mode. A 2-D stability analysis of finite pitch cavitating cascade analysis showed that rotating cavitations disoccur in such a more detailed flow model.
Thus it was reconfirmed that rotating cavitation is basically a 2-D local flow instability due to positive mass flow gain factor from various prints of view. However the detailed theoretical analyzes showed the possibilities of other types of rotating cavitations which have not been experimentally found. Studies of those modes were carried over as the future problems. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] Y. TSUJIMTO, Y. YOSHIDA, Y. MAEKAWA, S. WATANABE and T. HASHIMOTO: "Observations of Oscillating Cavitations of an Inducer" Joint ASME/JSME Proceedings of the Symposium on Cavitation and Gas-liquid Flow in Fluid Machinery and Devices. 226. 127-134 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 渡辺,横田,辻本: "インデューサの旋回キャビテーションの三次元解析(第1報,有限スパン翼列モデルを用いた線形解析)" 日本機械学会論文集(B編). 61-591. 3900-3907 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S. OTSUKA, Y. TSUJIMOTO, K. KAMIJO and O. FURUYA: "Frequency Dependence of Mass Flow Gain Factor and Cavitation Compliance of Cavitating Inducers" Transactions of the ASME, Journal of Fluids Engineering. 118-2. 400-408 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 渡辺,横田,辻本: "インデューサの旋回キャビテーションの三次元解析(第2報,環状翼列モデルを用いた線形解析)" 日本機械学会論文集(B編). 62-600. 3064-3069 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y. TSUJIMOTO, S. WATANABE, K. KAMIJO and Y. YOSHIDA: "A Nonlibear Calculation of Rotating Cavitation in Inducers" Transactions of the ASME, Journal of Fluids Engineering. 118-3. 589-594 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 前川,吉田,辻本,上條: "旋回キャビテーション発生下でインデューサに作用する非定常翼間圧力分布と非定常流体力" 日本機械学会論文集(B編). 63-605. 132-138 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 宮本,渡辺,横田,辻本: "流体の圧縮性を考慮した旋回キャビテーションの解析" 日本機械学会関西支部第71期定時総会講演会,日本機械学会論文集(B編). (投稿中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 関,東,渡辺,横田,辻本: "翼端漏れ流れに生じるキャビテーションの二次元モデルを用いた研究" 日本機械学会関西支部第72期定時総会講演会講演論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 渡辺,辻本,上條,古屋: "特異点法による非定常キャビテーション特性の解析" 日本機械学会第74期通常総会講演会講演論文集.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.TSUJIMOTO,Y.YOSHIDA,Y.MAEKAWA,S.WATANABE and T.HASHIMOTO: "Observations of Oscillating Cavitations of an Inducer" Joint ASME/JSME Proceedings of the Symposium on Cavitation and Gas-liquid Flow in Fluid Machinery and Devices. Vol.226. 127-134 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.WATANABE,K.YOKOTA and Y.TSUJIMOTO: "Three-Dimensional Analyzes of Rotating Cavitation in Inducers (1st Report, Linear Analysis Using a Finite-Span Cascade Model)" (in Japanese), Transactions of the JSME,Ser.B. 61-591. 3900-3907 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.OTSUKA,Y.TSUJIMOTO,K.KAMIJO and O.FURUYA: "Frequency Dependence of Mass Flow Gain Factor and Cavitation Compliance of Cavitating Inducers" Transactions of the ASME,Journal of Fluids Engineering. 118-2. 400-408 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.WATANABE,K.YOKOTA and Y.TSUJIMOTO: "Three-Dimensional Analyzes of Rotating Cavitation in Inducers (2nd Report, Linear Analysis Using an Annular Cascade Model)" (in Japanese), Transactions of the JSME,Ser.B. 62-600. 3064-3069 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.TSUJIMOT,S.WATANABE,K.KAMIJO and Y.YOSHIDA: "A Nonlinear Calculation of Rotating Cavitation in Inducers" Transactions of the ASME,Journal of Fluids Engineering. 118-3. 589-594 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.MAEKAWA,Y.YOKOTA,Y.TSUJIMOTO and K.KAMIJO: "Unsteady Interblade Pressure Distributions and Fluid Forces under Rotating Cavitation" (in Japanese), Transactions of the JSME,Ser.B. 63-605. 132-138 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Tsujimoto,S.Watanabe,K.Kamijo and Y.Yoshida: "A Nonlinear Calculation of Rotating Cavitation in Inducers" ASME Journal of Fluids Engineering. 118. 589-594 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Tsujimoto: "On Rotating Cavitation" 1997年流体機械研究開発協議会講演会. 13-22 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 渡辺聡,辻本良信,上條謙二郎,古屋興二: "特異点法による非定常キャビテーション特性の解析" 日本機械学会通常総会にて発表予定. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 渡辺聡,横田和彦,辻本良信: "インデューサの旋回キャビテーションの三次元解析" 日本機械学会論文集(B偏). 62-600. 156-161 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 前川康和,吉田義樹,辻本良信,上條謙二郎: "旋回キャビテーション発生下でインデューサに作用する非定常翼間圧力分布と非定常流体力" 日本機械学会論文集(B偏). 63-605. 132-138 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tsujimoto,Y.,Yoshida,Y.,Maekawa,Y.,Watanabe,S.,Hashimoto,T.: "Observations of Oscillating Cavitations of an Inducer" ASME FED. 226. 127-134 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 渡辺,横田,辻本: "インデューサの旋回キャビテーションの3次元解析(第1報,有限スパン翼列モデルを用いた線形解析)" 日本機械学会論文集. 61-591. 102-109 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Tsujimoto,Y.: "Rotating Cavitation : Knowns and Unknowns" ASME Paper. 95-FE-1. 1-9 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 渡辺,横田,辻本: "環状翼列モデルを用いた旋回キャビテーションの線形解析" 第34回ターボ機械協会総会講演会講演論文集. 89-94 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Tsujimoto,Y.: "Flow in Radial Turbomachines" von Karman Institute for Fluid Dynamics, 609 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.TSUJIMOTO,S.WATANABE,K.KAMIJO,Y.YOSHIDA: "A NON-LINEAR CALCULATION OF ROTATING CAVITATION IN INDUCERS" ASME,Cavitation and Multiphase Flow. Vol.194. 53-58 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.OTSUKA,Y.TSUJIMOTO,K.KAMIJO,O.FURUTA: "FREQUENCY DEPENDENCE OF MASS FLOW GAIN FACTOR AND CAVITATION COMPLIANCE OF CAVITATING INDUCERS" ASME,CAVITATION AND GAS-LIQUID FLOW IN FLUID MACHINERY AND DEVICES. Vol.190. 119-126 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.TSUJIMOTO,et.al.: "OBSERVASHIONS OF OSCILLATING CAVITATIONS OF AN INDUSER" ASME,Cavitation and Multiphase Flow. (発表予定). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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