涡轮导向叶片及其换热结构

Turbine guide blade and heat exchange structure thereof

Abstract

本公开是关于一种涡轮导向叶片及其换热结构,涉及涡轮发动机冷却技术领域,本公开的涡轮导向叶片的换热结构,应用于涡轮导向叶片缘板与机匣之间的腔室内,换热结构包括:多个进气孔、多个出气孔以及设置于进气孔与出气孔之间的扰流柱;其中多个进气孔开设于机匣靠近腔室前端的壁面上,低温气体通过进气孔向腔室输送;多个出气孔开设于导向叶片缘板靠近腔室后端的壁面上,经换热后的低温气体通过出气孔送出;扰流柱设于腔室内,低温气体进入腔室后通过扰流柱交换热量。一方面可以增大导向叶片缘板的换热面积和换热系数,强化换热效果,防止缘板烧蚀;另一方面可以提高冷却效率,采用相同或更少的冷气量,进一步减少对发动机性能产生的不良影响。
The invention discloses a turbine guide blade and a heat exchange structure of the turbine guide blade, and relates to the technical field of turbine engine cooling. The heat exchange structure of the turbine guide blade is applied into a cavity between a turbine guide blade edge plate and a casing. The heat exchange structure comprises multiple air inlet holes, multiple air outlet holes and turbulent flow columns arranged between the air inlet holes and the air outlet holes. The multiple air inlet holes are formed in the wall face, close to the front end of the cavity, of the casing, and low-temperature gas is conveyed to the cavity trough the air inlet holes. The multiple air outlet holes are formed in the wall face, close to the rear end of the cavity, of the guide blade edge plate. Heat-exchanged low-temperature gas is conveyed out through the air outlet holes. The turbulent flow columns are arranged in the cavity, and low-temperature gas enters the cavity and exchanges heat through the turbulent flow columns. On one hand, the heat exchange area and the heat exchange coefficient of the guide blade edge plate can be improved, the heat exchange effect is enhanced, and the edge plate is prevented from being ablated. On the other hand, the cooling efficiency can be improved, the same or smaller cold gas quantity is adopted, and adverse influences produced to the performance of an engine are further reduced.

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