Numerical investigation of supersonic flow over a parachute-like configuration including turbulent flow effects

Jianhui Fan, Jiaao Hao, Chih Yung Wen, Xiaopeng Xue

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Numerical simulations are conducted to investigate supersonic flow over a rigid parachute-like model with a small trailing distance at a freestream Mach number of 2.0 and freestream Reynolds number of 2.04×107 m−1. Turbulent effects on the flow evolution are highlighted by comparing the laminar and Reynolds-averaged Navier–Stokes (RANS) and detached eddy simulation (DES) predictions. The DES model can provide more accurate flow predictions both temporally and spatially than the laminar and RANS simulations. Comprehensive analyses are performed on the time sequence of instantaneous flow fields. The “pulsation” flow mode, as well as the lifecycle of vortex rings, are observed. Furthermore, although turbulent models have a minor effect on the dynamics of shock waves, they significantly alter the vortical structures. Analyses of the pressure fluctuation spectra also confirm that turbulent flows have a lower amplitude oscillation in high-frequency regions than laminar flows.

Original languageEnglish
Article number107330
JournalAerospace Science and Technology
Volume121
DOIs
Publication statusPublished - Feb 2022

Keywords

  • Compressible flow
  • Supersonic parachute
  • Turbulent effects
  • Unsteady flow

ASJC Scopus subject areas

  • Aerospace Engineering

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