气体示踪法研究燃烧器横向湍流混合扩散特性

STUDIES OF BURNER LATERAL TURBULENT MIXING AND DIFFUSION USING GAS TRACER ANALYSIS

摘要: 用气体示踪法对侧边风燃烧器弱旋流一次风和侧边直流二次风横向湍流混合扩散特性进行了详细研究，讨论了各截面混合物浓度分布规律及混合强度分布规律，分析对燃料着火的影响，同时利用湍流运动方程反算气体湍流扩散系数

Abstract: The characteristics of lateral turbulent mixing and diffusion between primary air(low swirl) and secondary air(no swirl) of the burner with side located secondary air were studied carefully by gas tracer analysis. The profiles of mixture concentration and mixing intensity at various cross sections along the axis were discussed. The effects of them on fuel ignition were also analyzed. The turbulent exchange coefficient is calculated from time mean equation. The results are of practical significance for ...