蜗壳喷嘴出口速度分布特性  

Characteristics of Velocity Distribution at Scroll Nozzle Outlet with Different Scroll Outline

作　　者：滕敦朋[1] 房克信[2] 

机构地区：[1]青岛海军潜艇学院基础部,山东青岛266071 [2]上海交通大学动力与能源工程学院,上海200030

出　　处：《应用科技》2002年第5期4-7,共4页Applied Science and Technology

摘　　要：用数值计算的方法 ,以k—ε双方程模型模拟蜗壳内的气体流动情况 ,以心形线拟合蜗壳的通流截面 ,用SIMPLEST算法计算了 3种不同型线蜗壳喷嘴出口气流角和速度的分布情况。对计算结果的比较表明 ,蜗壳型线的变化 ,对喷嘴出口气流参数的分布会产生明显的影响。当Aθ/rθ 沿周向线性变化时 ,喷嘴出口参数的分布最均匀。Numerical simulation of the three_dimensional turbulent flow field inside a turbocharger scroll was described and k-ε two_equation model was used to simulate the flow in the scroll. Cardioid was used to simulate the outline of the flow area of the cross section. The flow angle and velocity distributions at the scroll nozzle outlet with three different scroll outlines were calculated. The calculated results show that the scroll outline will distinctly influence the velocity distribution at the nozzle outlet.While AS A θ/r θ varies linearly around circumference, the velocity distribution is most uniform.

关 键 词：蜗壳型线 κ-ε双方程模型 喷嘴 速度分布 涡轮增压器 柴油机 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]