纵向波纹隔热屏通道的换热特性

推进技术 ›› 2002, Vol. 23 ›› Issue (3): 230-232.

纵向波纹隔热屏通道的换热特性

陆永华,常海萍,谈浩元

南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016;南京航空航天大学能源与动力学院江苏南京210016

发布日期:2021-08-15

Heating transfer of longitudinal ripple heat shield tunnel

Coll of Energy and Power,Nanjing Univ of Aeronautics and Astronautics, Nanjing 210016, China;Coll of Energy and Power,Nanjing Univ of Aeronautics and Astronautics, Nanjing 210016, China;Coll of Energy and Power,Nanjing Univ of Aeronautics and Astronautics, Nanjing 210016, China

Published:2021-08-15

摘要/Abstract

摘要： 通过改变进气流量、气流背压 ,实验研究了航空发动机加力燃烧室筒体纵向波纹板隔热屏通道结构对换热特性的影响。对无孔、每波两排孔和每波六排孔三种结构的实验结果表明 ,波纹板的换热效果远高于平板型 ,随着波纹板上的孔排数增加 ,换热效果增大 ;波形对波纹板的壁温和Nu数影响很大 ,密流比对Nu数的影响与波孔排数有关。得到的纵向波纹通道的平均换热经验公式 ,可用于指导加力燃烧室隔热屏的设计

关键词: 航空发动机;加力燃烧室;隔热;波纹板;传热;气膜冷却

Abstract: To discuss heat transfer characteristics of heat shield of aeroengine afterburner,three types of longitudinal ripple tunnels were investigated The different structure of longitudinal ripple tunnels had influence on heat transfer characteristics through changing fluid rates of inlet and background press and so on Finally,experiential formulae of heat transfer of longitudinal ripple runnels were obtained and this conclusion may be used for the design of heat shield of aeroengine afterburner

Key words: Aircraft engine;Afterburner;Thermal insulation;Corrugated pipe;Heat transfer;Film cooling

陆永华,常海萍,谈浩元. 纵向波纹隔热屏通道的换热特性[J]. 推进技术, 2002, 23(3): 230-232.