Vortical flow dynamics and acoustic response of swirl-stabilized injector

Shanwu Wang, Shih Yang Hsieh, Vigor Yang

研究成果: Paper同行評審

2 引文 斯高帕斯(Scopus)

摘要

This present work describes a comprehensive numerical study of the transient flow dynamics of a single-element swirl-stabilized injector. The theoretical model is based on the complete conservation equations of mass, momentum, and energy in three dimensions. Turbulence closure is achieved by means of a large-eddy-simulation (LES) technique. The compressible version of the Smagorinsky eddy-viscosity model is employed to describe the subgrid-scale turbulent motions and their effect on large-scale structures. The governing equations and the associated boundary conditions are solved by a finite-volume, four-stage Runge-Kutta scheme along with the implementation of the message passing interface (MPI) parallel computing architecture. Results show that the flow field in the injector is intrinsically unsteady and subject to shear and centrifugal instabilities. The unsteady local flow motions and vortex breakdown are clearly visualized and explained on theoretical bases. The unsteadiness may be related to periodic vortex shedding, vortex breakdown, and other phenomena that are velocity sensitive. Several mechanisms responsible for driving instabilities have been identified and quantified.

原文English
出版狀態Published - 2000
事件38th Aerospace Sciences Meeting and Exhibit 2000 - Reno, NV, United States
持續時間: 2000 一月 102000 一月 13

Other

Other38th Aerospace Sciences Meeting and Exhibit 2000
國家United States
城市Reno, NV
期間00-01-1000-01-13

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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