| Issue |
Volume 4, 2013
Progress in Propulsion Physics
|
|
|---|---|---|
| Page(s) | 457 - 466 | |
| Section | Chapter Four. Air-breathing and pulse detonation propulsion | |
| DOI | https://doi.org/10.1051/eucass/201304457 | |
| Published online | 05 March 2013 | |
Unsteady response of flow system around balance piston in a rocket pump
1
Japan Aerospace Exploration Agency 1, Koganezawa,
Kimigaya, Kakuda, Miyagi, Japan
2
IHI Corporation 1, Shin-Nakahara-Cho,
Isogo-ku, Yokohama, Japan
3
Yokohama National University 79-5, Tokiwadai,
Hodogaya-ku, Yokohama, Japan
In the rocket engine turbopump, a self-balancing type of axial thrust balancing system using a balance piston is often applied. In this study, the balancing system in liquid-hydrogen (LH2) rocket pump was modeled combining the mechanical structure and the flow system, and the unsteady response of the balance piston was investigated. The axial vibration characteristics of the balance piston with a large amplitude were determined, sweeping the frequency of the pressure fluctuation on the inlet of the balance piston. This vibration was significantly affected by the compressibility of LH2.
© Owned by the authors, published by EDP Sciences, 2013