大焓降静叶翘曲端壁流动控制研究

发布时间：2018-05-08 23:20

本文选题：大焓降 + 静叶　；参考：《汽轮机技术》2016年01期

【摘要】：以气动性能优良的尾缘正弯积迭的大焓降静叶为原型,采用5条具有控制点的B样条曲线作为沿流向的控制线设计翘曲端壁,研究翘曲端壁对端部的流动控制和探索翘曲端壁降低损失的机理。通过商业软件NUMECA数值研究了翘曲端壁对大焓降静压总压损失及根部载荷分布的影响,指出翘曲端壁可降低端部区域的横向压力梯度,削弱二次流强度,同时也增加摩擦损失,选择适合的翘曲型面并控制翘曲幅度在边界层以内可有效降低端部总压损失。
[Abstract]:The large enthalpy drop static vanes with good aerodynamic performance are used as the prototype, and five B-spline curves with control points are used to design the warping end wall along the flow direction control line. The flow control of warpage end wall to end wall is studied and the mechanism of reducing warpage end wall loss is explored. The effect of warpage end wall on total pressure loss and root load distribution of large enthalpy drop static pressure is studied numerically by commercial software NUMECA. It is pointed out that warpage end wall can reduce transverse pressure gradient in end region, weaken secondary flow strength and increase friction loss. Selecting a suitable warping surface and controlling the warping amplitude within the boundary layer can effectively reduce the end total pressure loss.
【作者单位】：哈尔滨汽轮机厂有限责任公司;哈尔滨工业大学能源科学与工程学院;
【分类号】：O35

【相似文献】