The Effect of Land Taper Angle on Trailing Edge Slot Film Cooling
The Effect of Land Taper Angle on Trailing Edge Slot Film Cooling
复制标题
平台锥角对后缘缝膜冷却的影响
DOI：
10.1115/gt2014-25579
复制
发表时间：
2014
影响因子：
3.8
通讯作者：
J. Eaton
中科院分区：
文献类型：
--
作者：
Julia Ling;C. Elkins;J. Eaton
尾缘狭缝气膜冷却是一种广泛应用的保护涡轮机叶片薄尾缘免受热气冲击的方法。将槽分开的结构，称为“槽脊”，有各种各样的结构，可以大致分为“锥形”或“直形”。本文探讨了土地锥角的冷却剂流与主流的混合的效果，通过比较三种配置：直土地的情况下，以前报道的情况下，轻微的锥形土地，和强烈的锥形土地的情况。在每种情况下，槽宽度和槽出口平面处的槽脊宽度保持恒定。对于每种配置，使用磁共振成像技术测量平均体积冷却剂浓度分布和3分量速度场。结果表明，刃带锥角对冷却剂表面的平均流动特性和冷却剂表面效率有很大的影响。此外，槽脊结构对流场和浓度分布的影响不仅体现在切槽区域，还体现在叶片尾流中。Copyright © 2014 by ASME
Trailing edge slot film cooling is a widely used method of protecting the thin trailing edge of turbine blades from hot gas impingement. The structures that separate the slots, known as “lands,” come in a variety of configurations which can be broadly classified as either “tapered” or “straight.” This paper examines the effect of the land taper angle on the mixing of the coolant flow with the main flow by comparing three configurations: a case with straight lands, a previously reported case with slightly tapered lands, and a case with strongly tapered lands. In each case, the slot width and the land width at the plane of the slot exit are kept constant. For each configuration, the mean volumetric coolant concentration distribution and 3-component velocity field were measured using Magnetic Resonance Imaging techniques. It is shown that the land taper angle has a strong effect on the mean flow features and coolant surface effectiveness. Furthermore, the impact of the lands configuration on the flow field and concentration distribution is seen not just in the cutback region, but also in the wake of the blade.Copyright © 2014 by ASME
DOI：
--
发表时间：
1994
期刊：
Magnetic resonance quarterly
影响因子：
--
作者：
Pelc,NJ;Sommer,FG;Li,KC;Brosnan,TJ;Herfkens,RJ;Enzmann,DR
通讯作者：
Enzmann,DR