|Table of Contents|

Characteristics of water hammer in shutting based on FSI(PDF)

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

Issue:
2019年02期
Page:
36-43
Research Field:
研究与设计
Publishing date:

Info

Title:
Characteristics of water hammer in shutting based on FSI
Author(s):
ZHANG Kaihong1; JIANG Xin2;  XIAO Mingjie1; LIANG Shuqiang 1;  HU Wei1; JI Peng1
(1.Xi'an Aerospace Propulsion Institute, Science and Technology on Liquid Rocket Engine Laboratory,Xi'an 710100,China; 2.Academy of Aerospace Propulsion Technology, Xi'an 710100,China)
Keywords:
FSI;  water hammer in shutting;  energy dissipation;  orbit-control engine;  pressure wave
PACS:
TV137
DOI:
-
Abstract:
In order to consider the effect of structural deformation on water hammer characteristics, two-way FSI analysis system was built to simulate water hammer.The propagation of pressure wave and energy dissipation were analyzed through pressure and streamline distribution.According to the development trend of orbit-control engine, eight working conditions were designed to analyze the effect of backpressure, flux and valve closing time on water hammer characteristics.The simulation results indicate that, only a small part of the energy of water hammer is dissipated through flowing out from the inlet and the structural deformation, and most of the energy dissipation is due to the viscous loss of the fluid.The flux only affects the peak pressure of water hammer.The greater the flux is, the larger the peak pressure of water hammer is.The shortening of valve closing time increases peak pressure and frequency of oscillation, and reduces the attenuation rate.Backpressure has no effect on water hammer characteristics.Therefore, in the high-pressure water hammer test of orbit-controlled engine, the outlet back-pressure can be reduced under the same flux and valve closing time, and the water hammer pressure curve consistent with that under high backpressure can be obtained.

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Last Update: 2019-04-30