Model reduction for supersonic cavity flow using proper orthogonal decomposition (POD) and Galerkin projection
作者: Chao ZhangZhenhua WanDejun Sun
作者单位: 1University of Science and Technology of China
刊名: Applied Mathematics and Mechanics, 2017, Vol.38 (5), pp.723-736
来源数据库: Springer Nature Journal
DOI: 10.1007/s10483-017-2195-9
关键词: Supersonic cavity flowReduced-order model (ROM)Proper orthogonal decomposition (POD)Galerkin projectionO354.3O422.876J2076Q05
原始语种摘要: 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...
全文获取路径: Springer Nature  (合作)
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影响因子:0.647 (2012)

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关键词翻译
关键词翻译
  • projection 投射
  • POD Power On Diagnostics
  • cavity 
  • supersonic 超声波的
  • decomposition 分解
  • proper 合适的
  • orthogonal 直交的
  • popular 普及
  • reduction 减少
  • robust 牢固的