Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method

代珂; 郭峰; 朱剑锋; 尤延铖

doi:10.13224/j.cnki.jasp.2019.05.013

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Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method

更新时间：2026-07-07

- Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method
- Vol. 34, Issue 5, Pages: 1076-1084(2019)
- 作者机构：
  
  厦门大学航空航天学院,福建,厦门,361102
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2019.05.013
  CLC：
- Published：2019
- 稿件说明：
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代珂, 郭峰, 朱剑锋, 尤延铖. 基于DMD方法的超声速进气道喘振特性分析[J]. 航空动力学报, 2019, 34(5): 1076-1084.

doi: 10.13224/j.cnki.jasp.2019.05.013
代珂, 郭峰, 朱剑锋, 尤延铖. 基于DMD方法的超声速进气道喘振特性分析[J]. 航空动力学报, 2019, 34(5): 1076-1084. DOI： 10.13224/j.cnki.jasp.2019.05.013.

doi: 10.13224/j.cnki.jasp.2019.05.013 DOI：

摘要

采用非定常数值仿真方法对典型超声速进气道的喘振现象进行了研究，并引入动力模态分解(DMD)方法对小喘和大喘流动特性进行了分析，获取了小喘及大喘的流场振荡特征，其中DMD得到的1阶模态反映了时均流场特征、2阶模态反映了主频振荡流场特性。在此基础上，针对小喘与大喘的相互关系进行了研究，结果表明：进气道内小喘流动包含大喘的流场振荡特性，小喘状态是进气道由不喘到大喘状态的中间状态，由小喘向大喘演化过程中，进气道内一些流动特征逐渐减弱并趋于稳定收敛，大喘的流场结构整体上比小喘状态更为稳定。

Abstract

Buzz phenomena of a typical supersonic inlet were studied with numerical simulations. The dynamic mode decomposition (DMD) method was introduced to analyze the flow characteristics of the little buzz and big buzz. The first order dynamic mode reflected the time-averaged flow field characteristics

and the second order dynamic mode showed the flow field features of the main frequency oscillation. In addition

the research on the relationship between little buzz and big buzz reveals that the flow of little buzz contains the oscillation characteristics of the big buzz

and little buzz regime is a transitional state from the steady flow field to the big buzz regime. During the evolution from the little buzz to the big buzz

some flow structures in the inlet are gradually weakened and tend to be stable

hence the overall flow field of the big buzz is more stable than that of the little buzz.

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