Analysis of Acoustic Cavitation Surge in a Rocket Engine Turbopump | Zendy

Hideaki Nanri | Zendy; Hiroki Kannan | Zendy; Naoki Tani | Zendy; Yoshiki YOSHIDA | Zendy

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Analysis of Acoustic Cavitation Surge in a Rocket Engine Turbopump

Author(s) -

Hideaki Nanri,

Hiroki Kannan,

Naoki Tani,

Yoshiki YOSHIDA

Publication year - 2010

Publication title -

international journal of rotating machinery

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.265

H-Index - 33

eISSN - 1026-7115

pISSN - 1023-621X

DOI - 10.1155/2010/717013

Subject(s) - cavitation , surge , mechanics , rocket (weapon) , inertia , liquid propellant rocket , rocket engine , inlet , instability , compressible flow , compressibility , materials science , physics , aerospace engineering , mechanical engineering , meteorology , classical mechanics , engineering , propellant

In a liquid rocket engine, cavitation in an inducer of a turbopump sometimes causes instability phenomena when the inducer is operated at low inlet pressure. Cavitation surge (auto-oscillation), one such instability phenomenon, has been discussed mainly based on an inertia model assuming incompressible flow. When this model is used, the frequency of the cavitation surge decreases continuously as the inlet pressure of the turbopump decreases. However, we obtained an interesting experimental result in which the frequency of cavitation surge varied discontinuously. Therefore, we employed one-dimensional analysis based on an acoustic model in which the fluid is assumed to be compressible. The analytical result qualitatively corresponded with the experimental result

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