短距/垂直起降飞机近地面机腹温升影响特性数值模拟  

Numerical simulation on the effect characteristics of belly temperature rise for short/vertical takeoff and landing aircraft proximity of ground

作　　者：李春 李广超 LI Chun;LI Guangchao(School of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空发动机学院,沈阳110136

出　　处：《航空动力学报》2024年第10期387-394,共8页Journal of Aerospace Power

基　　金：辽宁省自然科学基金(2022-MS-296)。

摘　　要：通过计算流体力学方法和响应面法获得了机腹温升关于喷管落压比、来流速度及喷管出口离地高度的2阶响应曲面回归方程,以及显著影响飞机机腹温升的关键因素。分析了喷管落压比、来流速度和喷管出口离地高度对飞机机腹温升的交互影响作用,并得到了给定工况范围内机腹温升最大的工况。研究表明:仅考虑单因素影响时,机腹温升随落压比、来流速度和喷管出口离地高度的增大而减小;考虑两因素交互作用时,只有高度与落压比对机腹存在交互影响;考虑单因素2阶影响时,喷管出口离地高度、来流速度和喷管落压比均对机腹温升存在2阶效应。优化获得的机腹温升最大的工作点是尾喷管出口离地高度为3倍尾喷管出口直径、喷管落压比为2、来流速度为0 m/s,此时的机腹温度变化为13.92%。The two-order response surface regression functions of the belly temperature rise of the aircraft about the nozzle pressure ratio(NPR),inflow velocity and the height of the nozzle exit were obtained by CFD method and the response surface method,and the key factors significantly affecting the belly temperature rise were also acquired.The interaction effects of NPR,inflow velocity and height of nozzle exit above ground on aircraft belly temperature rise were analyzed,and the maximum belly temperature rise in certain range working state was obtained.The study showed that when considering single factor the belly temperature rise decreased with the increase NPR,inflow velocity and the height of nozzle exit above the ground.When considering the interaction of the two factors,only height and NPR had interaction effects on the belly.When considering the two-order influence of single factor,there were two order effects of height of nozzle exit,inflow velocity and NPR.According to the maximum belly temperature rise obtained by optimization,the height of rear nozzle exit above ground was treble the diameter of rear nozzle exit,the NPR was 2,and the inflow velocity was O m/s.In this case,the belly temperature change was 13.92%.

关 键 词：短距/垂直起降(S/VTOL) 机腹温升 响应面 交互作用 2阶效应 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程]