|Table of Contents|

Simulation analysis on separation flow in rocket engine nozzle(PDF)

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

Issue:
2014年06期
Page:
21-26
Research Field:
研究与设计
Publishing date:

Info

Title:
Simulation analysis on separation flow in rocket engine nozzle
Author(s):
HU Hai-feng;  GAO Xin-ni;  LING Qian-cheng;  ZHANG Rong-jun
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
large expand ratio nozzle;  flow separation;  wavelet analysis;  FEM
PACS:
V434-34
DOI:
-
Abstract:
Flow status of the large expand ratio rocket engine nozzle is studied with numerical method. The influence of the different RANS turbulence models on separation flow is discussed. Based on this, the variation of flow separation modal from free shock separation (FSS) to restricted shock separation (RSS) occurred in the nozzle is analyzed in detail. The unsteady-state analysis is carried out on the basis of steady-state simulation. The effect of lateral load is also analyzed in combination with the wavelet analysis and FEM. The research result shows that the pressure intensity pulsation in the nozzle is low-frequency one, whose frequency range has resonance with inherent frequency of the nozzle. The conclusion laid a foundation for the subsequent analysis and verification test of the lateral load of flow separation in the nozzle.

References:

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