不同端口下单级狭缝引射对冷却气膜影响的数值计算

摘要

狭缝引射是气膜冷却结构中比较重要的一个，多用于船体和燃气轮机的尾气排放装置。但现有对该结构的研究多是整体性能方面，对单级引射结构的引射效果则研究较少。通过对直角、45°角和圆角这三种不同端口以及每种端口下，三种不同狭缝宽度进行数值模拟，得出了引射效果最佳的单级结构、宽度尺寸及该结构的研究方向。%Slit ejector is one of the important structures in film cooling. It is used for the apparatus of the ships and the gas turbine exhaust emissions to reduce the exhaust emission temperature and protect the device. Most researches on this structure nowadays are about the overall performance. There are fewer researches which focus on the single ejector structure. Through the numerical simulations of three different ports and three different slit width of the structure, the best result of the single stage ejector structure and width size is given in this paper.