平面超声速引射器内部流动的大涡模拟
收稿日期: 2013-11-14
修回日期: 2013-12-16
网络出版日期: 2013-12-19
基金资助
国家自然科学基金（11202100）；江苏省自然科学基金（BK2011723）；中央高校基本科研业务费专项资金（NS2012032）；江苏省博士后科研资助计划（0902001C）；江苏高校优势学科建设工程资助项目
Large Eddy Simulation of Flow in a Plane Supersonic Ejector
Received date: 2013-11-14
Revised date: 2013-12-16
Online published: 2013-12-19
Supported by
National Natural Science Foundation of China (11202100); Natural Science Fund in Jiangsu Province (BK2011723); Fundamental Research Funds for the Central Universities (NS2012032); Jiangsu Planned Projects for Postdoctoral Research Funds (0902001C); Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
许常悦, 周涛, 王从磊. 平面超声速引射器内部流动的大涡模拟[J]. 航空学报, 2014, 35(8): 2136-2143. DOI: 10.7527/S1000-6893.2013.0493
The flow in a plane supersonic ejector is investigated numerically using a large eddy simulation (LES) technique. In order to validate the reliability of LES method, quantitative comparisons of the calculated result with experimental data are made including the velocity and temperature profiles. They show that the present computational results agree well with the experimental data, which indicates that the LES method can be used to study this problem. The instability processes of the primary jet in the ejector are the same as those of the free jet, which can be divided into three different stages, i.e., shear layer growth, instability and mixing. Distributions of the Lamb vector divergence indicate that the mixing process is restricted in a narrow zonal-area. Power spectral density analysis of pressure signals in the mixing section shows that the flow mixing process is dominated by the primary jet instability, and the characteristic Strouhal number is approximately 0.27.
Key words： compressible flow; ejector; jet; large eddy simulation; turbulence
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