Theoretical Analysis of Unsteady Blade Loading of Inducers Under Rotating Cavitation

Watanabe, Satoshi and Furukawa, Akinori and Horiguchi, Hironori and Fukutomi, Jun-ichirou and Tsujimoto, Yoshinobu (2001) Theoretical Analysis of Unsteady Blade Loading of Inducers Under Rotating Cavitation. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA.

Full text available as:

PDF - Requires Adobe Acrobat Reader or other PDF viewer.

Abstract

Rotating cavitation is one of the flow instabilities associated with cavitation, which has been a problem for the development of turbopumps of liquid rocket engines since it causes super-synchronous shaft vibration. Recently, it is argued that rotating cavitation might also cause large repetitive stresses on blades. This paper describes about the theoretical prediction of unsteady blade forces on the cavitating inducer under rotating cavitation. Unsteady pressure distributions and a lift force for a 2-dimensitional flat plate cascade under rotating cavitation are calculated by using a linearized free streamline theory based on the unsteady closed cavity model and singularity method. Since the linearized calculation cannot predict the absolute magnitude of the fluctuations, the unsteady pressure distributions and resulting lift fluctuations are presented for a given magnitude of cavity length fluctuations.

EPrint Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	cavitation, rotating cavitation, inducer, unsteady fluid force, unsteady blade loading, cavitation instabilities
Subjects:	All Records Session B8 Turbomachinery 2
ID Code:	71
Deposited By:	Satoshi Watanabe
Deposited On:	09 April 2001
Record Number:	CAV2001:sessionB8.005
Official Persistent URL:	http://resolver.caltech.edu/CAV2001:sessionB8.005
Usage Policy:	The papers of this symposium proceedings are protected by copyright, retained by the authors. Authors control translation and reproduction rights to these works. However, readers are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format. This permission is in addition to rights of reproduction granted under Section 107, 108, and other provisions of the U.S. Copyright Act.

Archive Staff Only: edit this record