南京理工大学学报（自然科学版）2019，Vol.43Issue(2)：165-169,5.DOI:10.14177/j.cnki.32-1397n.2019.43.02.007
单喷管火箭燃气导流环境下的噪声分析
Acoustic analysis of deflected jet flow for rocket with single nozzle
盛英华 1沈林 1曹文斌 1乐贵高 2邢成龙2
作者信息
- 1. 上海宇航系统工程研究所,上海201109
- 2. 南京理工大学 机械工程学院,江苏 南京210094
- 折叠
摘要
Abstract
As a main source of external excitation,the noise level of jet flow of lift-off rockets is also one of the criterions for design and verification of structure and equipment. To establish a kind of numerical methodology for predicting acoustic level of a rocket engine,the jet noise of deflected flow for the single nozzle rocket is studied by solving the 3-D Navier-Stokes formulas of the compressible flow field in this paper,and the convective flux is analyzed by the 2nd order Roe TVD difference method and the dissipa-tion term of SAS turbulence model is computed by means of the central difference method. The acoustic excitation is acquired by the Ffowcs Williams-Hawkings ( FW-H) theroy. Computational results are reasonablly in accordance with experimental data. The transmission delay characteristic and the circumferential distribution for noise level on the ground is also analyzed. The results show that the noise of jet flow of the rocket engine is mainly in a broad frequency band distribution,and the overall sound pressure levels are reduced as the distance from the receiver to the nozzle increases.关键词
喷流噪声/燃气射流/计算流体力学/起飞环境/火箭发动机Key words
jet noise/gas jet/computational fluid dynamics/lift-off environment/rocket engine分类
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盛英华,沈林,曹文斌,乐贵高,邢成龙..单喷管火箭燃气导流环境下的噪声分析[J].南京理工大学学报（自然科学版）,2019,43(2):165-169,5.
