VELOCITY CHARACTERISTICS OF A SWIRLING RECIRCULATING FLOW

被引：12
|
作者：
HEITOR, MV
MOREIRA, ALN
机构：
[1] Instituto Superior Técnico, Department of Mechanical Engineering, Technical University of Lisbon, Lisbon
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1992年 / 5卷 / 03期
关键词：
SWIRLING FLOW; TURBULENT TRANSPORT; MODEL BURNER;
D O I：
10.1016/0894-1777(92)90082-G
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The isothermal recirculating flow downstream of a model swirl burner is studied making use of a laser-Doppler velocimeter. The arrangement was designed to incorporate the injection of liquid fuel into a gas flame characterized by a large recirculation zone attached to the burner head and to allow a detailed analysis of turbulent transport processes in a strongly swirled recirculating flow. The results show that turbulent mixing in the present flow is not dominated by large-scale motions or precession. The production of turbulent kinetic energy depends upon mechanisms of shear-generated turbulence but is influenced by streamline curvature in the zone of mean shear. Inspection of the terms in the conservation equations for the turbulent stresses allows quantification of the extent to which the interaction of normal stresses and normal strains influence the flow and suggests the likely magnitude of turbulent diffusion and dissipation.
引用
收藏
页码：369 / 380
页数：12
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