Model reduction for supersonic cavity flow using proper orthogonal decomposition(POD)and Galerkin projection
作者机构：Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China
基 金：Project supported by the National Natural Science Foundation of China(Nos.11232011 11402262 11572314 and 11621202)
出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)
年 卷 期：2017年第38卷第5期
页 码：723-736页
摘 要：The reduced-order model （ROM） for the two-dimensional supersonic cavity flow based on proper orthogonal decomposition （POD） and Galerkin projection is investigated. Presently, popular ROMs in cavity flows are based on an isentropic assumption, valid only for flows at low or moderate Mach numbers. A new ROM is constructed involving primitive variables of the fully compressible Navier-Stokes （N-S） equations, which is suitable for flows at high Mach numbers. Compared with the direct numerical simulation （DNS） results, the proposed model predicts flow dynamics （e.g., dominant frequency and amplitude） accurately for supersonic cavity flows, and is robust. The comparison between the present transient flow fields and those of the DNS shows that the proposed ROM can capture self-sustained oscillations of a shear layer. In addition, the present model reduction method can be easily extended to other supersonic flows.
主 题 词：supersonic cavity flow reduced-order model (ROM) proper orthogonal decomposition (POD) Galerkin projection
学科分类：080704[080704] 080103[080103] 08[工学] 0807[工学-电子信息类] 0801[工学-力学类]
核心收录：
D O I：10.1007/si0483-017-2195-9
馆 藏 号：203230490...
