Rotating Choke in Cavitating Turbopump Inducer-Reference-Cited by-同舟云学术

Rotating Choke in Cavitating Turbopump Inducer

Published:2004-01-01 Issue:1 Volume:126 Page:87-93
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Semenov Yury A.¹,Fujii Akira¹,Tsujimoto Yoshinobu¹

Affiliation:

1. Osaka University, Graduate School of Engineering Science, 1-3 Machikaneyama, Toyonaka 560-8581, Osaka, Japan

Abstract

During the development stage of the liquid hydrogen turbopump for the main engine LE-7A of the H-IIA rocket, a new type of cavitation instability was observed. This instability occurs at lower cavitation numbers where the head of the inducer starts to decrease due to choke. The disturbance rotates around the rotor at about 50% of the inducer rotational speed. So, it is called “rotating choke.” In order to predict the instability, a cavity model with a cavity wake is developed. The region of instability and the frequency predicted by the model are in agreement with experiment. Discussions are made as to the relationship between rotating choke and rotating cavitation.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/126/1/87/5902559/87_1.pdf

Reference13 articles.

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2. Tsujimoto, Y., Kamijo, K., Brennen, C., 1999, “Unified Treatment of Flow Instabilities of Turbomachinaries,” AIAA paper 99-2678.

3. Horiguchi, H., Watanabe, S., Tsujimoto, Y., Aoki, M., 2000, “A Theoretical Analysis of Alternate Blade Cavitation in Inducers,” J. Fluids Eng., 122(1), pp. 156–163.

4. Greitzer, E. M. , 1976, “Surge and Rotating Stall in Axial Flow Compressors, Part 1; Theoretical Compression System Model, Part 2; Experimental Results and comparison Theory,” ASME J. Eng. Power, 98, pp. 190–217.

5. Stripling, L. B., and Acosta, A. J., 1962, “Cavitation in Turbopump—Part 1,” ASME J. Fluids Eng., 84(3), pp. 326–338.

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