Large eddy simulation of supersonic jet mixing flow

被引：0
|
作者：
Zhu Z. [1 ]
Cheng X. [1 ]
Pan H. [1 ]
机构：
[1] China Academy of Aerospace Aerodynamics, China Aerospace Sicence and Technology Corporation, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 01期
关键词：
Jet cooling flow; Large eddy simulation; Shear layer; Supersonic; Transition; Turbulence;
D O I：
10.13224/j.cnki.jasp.2019.01.024
中图分类号：
学科分类号：
摘要：
On the background of cooling jet flow on the optical window, the supersonic jet flow over a backward facing step was investigated via large-eddy simulation (LES). Based on the implicit sub-grid model, the numerical method utilized the seventh order WENO scheme for spatial discretion, which was validated by the simulation of the supersonic mixing layer. The computational model for supersonic jet mixing flow was identical to the wind tunnel experiment, and the Mach number of the free flow and jet flow were set as 3.4 and 2.5, respectively. The numerical simulation captured the complex flow structures of compressive and expansive waves, as well as the shearing mixing layer and boundary layers. The process of flow becoming unsteady and transiting to turbulence was predicted subtly. The position and shape of large-scale turbulent structures obtained from numerical simulation agreed with experimental images. By the analysis of instantaneous, averaged, and fluctuant flow field, the temporal and spatial evolution of flow structures were revealed, and the feature of density fluctuation was acquainted. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：210 / 216
页数：6
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