|Table of Contents|

Vibration characteristics of the turbopump casing under two different fluid force transmission paths(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2023年01期
Page:
72-79
Research Field:
目次
Publishing date:

Info

Title:
Vibration characteristics of the turbopump casing under two different fluid force transmission paths
Author(s):
YANG Baofeng1;  JIN Lu1;  WANG Xiaofeng1;  CHEN Hui1; 2;  HUO Shihui1; 2
(1.Xian Aerospace Propulsion Institute, Xian 710100, China 2.Science and Technology on Liquid Rocket Engine Laboratory, Xian 710100, China)
Keywords:
turbopump centrifugal pump flow induced vibration(FIV) casing vibration transmission path
PACS:
V434.21
DOI:
-
Abstract:
The unsteady fluid force induced vibration of the pump casing in a liquid rocket engine turbopump mainly transmits via two different transmission paths:the fluid-casing path and the fluid-rotor-bearing-casing path, which may pose a threat to the security and reliability of the engine.To obtain the vibration characteristics of the turbopump casing, the quantitative prediction methods of flow-induced pump casing vibration under both two paths were established.The precision and reliability of these methods were verified by hot-fire test result of the engine and the vibration characteristics of the pump casing under different paths were obtained by these methods.Results show that the vibration prediction methods can accurately predict the vibration of the pump casing and the max error of the main frequency amplitude is below 13.85.The maximum vibration energy of the pump casing originates from interaction between the unsteady rotor-stator-interaction flow in the pump and the pump casing structure.The flow-induced vibration of the turbopump casing is mainly induced by the fluid-casing path, which is two orders higher than the fluid-rotor-bearing-casing path.

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