Flow-Field of an Axisymmetric Lobed Mixer

作     者：I.Yimer S.Manipurath I.Campbell W.E.Carscallen 

作者机构：Gas Turbine Environmental Research CentreAerodynamics LabInstitute for Aerospace ResearchNational Research Council Canada1200 Montreal RoadOttawaOntarioCanadaK1A 0R6 

出 版 物：《Journal of Thermal Science》 (热科学学报(英文版))

年 卷 期：2004年第13卷第1期

页      面：40-45页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：axisymmetric lobed mixer confined flow fuel/air mixing 

摘      要：The flow-field of a fuel/air mixing system with an axisymmetric lobed mixer was numerically investigated. Large-scale streamwise vortices are formed immediately downstream of the mixer trailing edge, stretched further downstream, and finally broken into fragments where more intense mixing occurs. Both numerical and experimental results indicate that the length required for streamwise vortices breakdown in the confined flow-field of an axisymmetric lobed mixer is much shorter than that in the case of planar lobed mixers subject to parallel freestreams. For the conditions studied, the streamwise vortices start to breakdown at three wavelengths downstream of the mixer trailing edge.