IMECH-IR  > 高温气体动力学国家重点实验室
Three-dimensional numerical study of the acoustic properities of a highly underexpanded jet
Wu K(吴坤); Li XP(李晓鹏); Yao W(姚卫); Fan XJ(范学军)
Source Publication20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
2015
Conference Name20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015
Conference DateJuly 6, 2015 - July 9, 2015
Conference PlaceGlasgow, United kingdom
AbstractThe goal of this paper is to advance the simulation of the acoustic field of highly underexpanded jets and to gain a deeper physical understanding of the noise generation mechanism. Large eddy simulation of an underexpanded jet with NPR of 5.60 is implemented with one-equation model for sub-grid scale (SGS) kinetic energy. The predicted time-averaged results agree well with the literature data and theoretical model, especially for the height and diameter of Mach disk. The generation and transport mechanism of sound source are discussed based on high temporal-resolution instantaneous flow fields. Furthermore, the dual-source pattern of the jet noise field is revealed by frequency spectrum analysis. © 2015, AIAA American Institute of Aeronautics and Astronautics. All rights reserved.
KeywordFrequency Spectrum Analysis High Temporal Resolution Instantaneous Flow Noise Generation Mechanisms Theoretical Modeling Three Dimensional Numerical Studies Transport Mechanism Under Expanded Jets
DepartmentLHD超声速燃烧
ISBN9781624103209
URL查看原文
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60164
Collection高温气体动力学国家重点实验室
Recommended Citation
GB/T 7714
Wu K,Li XP,Yao W,et al. Three-dimensional numerical study of the acoustic properities of a highly underexpanded jet[C],2015.
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