Large eddy simulation of active control on low frequency combustion instabilities in a dump combustor

Shao Wen Wan, Guo Qiang He, Lei Shi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Large eddy simulation (LES) coupling with multi-step chemical mechanisms was used to investigate open-loop active control of low-frequency combustion instabilities in a dump combustor. For large vortex structures shedding from dump plane and propagating play a key role in low frequency unsteady combustion, the air injection and gas suction through small slot on dump plane were proposed to control combustion instabilities. Simulation results indicate that formation of large scale vortices from dump plane is effectively destroyed and positive feedback mechanism of oscillation energy is interrupted. Air injection and gas suction are both effective to suppress pressure oscillations, with their magnitudes decrease by 48% and 54% respectively.

Original languageEnglish
Pages (from-to)32-37
Number of pages6
JournalGuti Huojian Jishu/Journal of Solid Rocket Technology
Volume34
Issue number1
StatePublished - Feb 2011

Keywords

  • Combustion control
  • Dump combustor
  • Large eddy simulation
  • Low frequency combustion instabilities

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