Affiliation of Author(s):能源与动力学院
Journal:推进技术
Key Words:超声速进气道;弯曲扩张段;激波串;自激振荡;分离包;
Abstract:为了研究一种典型超声速进气道弯曲扩张段内流场结构及激波串自激振荡特性,采用数值模拟方法分析了扩张段出口反压对激波串振荡的影响规律及气流分离和激波串振荡的关系。结果表明:随着反压增大,激波串的大幅振荡和小幅振荡交错出现。当激波串头激波与背景激波相交时,激波串出现高频小幅振荡,振动频率大于900Hz;当激波串前缘点的位置处在扩张段上壁面背景激波反射点时,激波串出现低频大幅振荡,振动频率为200~500Hz;而处在扩张段下壁面背景激波反射点时,不会出现低频大幅振荡。激波串振荡频率与扩张段内部分离包变化频率相近,壁面形状和背景激波的逆压力梯度是激波串大幅自激振荡的影响因素。
Translation or Not:no
Date of Publication:2018-07-25
Co-author:汪昆,刘雨
Correspondence Author:Lyurong Xie
Associate Professor
Supervisor of Master's Candidates
Gender:Female
Education Level:南京航空航天大学
Degree:Doctoral Degree in Engineering
School/Department:College of Energy and Power Engineering
Discipline:Aerospace Propulsion Theory and Engineering. Engineering Thermophysics
Business Address:A10-640
Contact Information:13815887418
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