旋流器出口结构对旋流火焰的影响研究

Research output: Contribution to journalArticle

Abstract

To deeply understand the non-premixed swirl flame, the effects of two burner exit geometries on the non-premixed swirl flames modes were studied by performing OH-PLIF, PIV measurements and coupling LES with PDF combustion model numerically. The results showed that the stochastic PDF method can predict the swirl flow fields and detailed flame structures including local extinction. Two different quarl geometries played significant roles on the flow fields thus leading to the local extinction and lift-off. The recirculation zone is smaller in the non-quarl case which causes a more serious quenching state. Meanwhile, at the stoichiometric equivalence ratio, the OH and CH2O distributions in the no-quarl exit were broader than the quarl exit at the low temperature regime. This indicated that many low-temperature reactions took places, providing beneficial conditions for the lift-off flame stabilization.

Details

Authors
Organisations
External organisations
  • Harbin Engineering University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Fluid Mechanics and Acoustics

Keywords

  • LES-PDF, Local quenching, Quarl structure geometry, Swirl flame
Translated title of the contributionEffects of Burner Exit Geometries on Swirl Flames
Original languageChinese
Pages (from-to)1324-1331
Number of pages8
JournalTuijin Jishu/Journal of Propulsion Technology
Volume40
Issue number6
Publication statusPublished - 2019 Jun 1
Publication categoryResearch
Peer-reviewedYes