摘要
高压捕获翼是一种可以在高超声速条件下同时获得高升阻比、高容积率和高升力系数的新型布局概念。为初步分析该类新型布局的宽速域气动特性,以一种圆锥-圆台体组合高压捕获翼原理性构型为计算模型,以典型跨声速条件(马赫数0.92、0°攻角)为计算工况,进行了计算和分析。流场分析结果表明,在跨声速流动条件下,机体与高压捕获翼之间存在比较强烈的气动干扰,且干扰的强烈程度与高压捕获翼-机体间的垂向距离大小直接相关。与不带捕获翼的参考构型相比,增加捕获翼会导致机体尾部分离区范围增大,并在机体与捕获翼之间的开放通道内形成类似于变截面收缩管的流动,致使沿流向方向出现了明显的激波串,进而导致捕获翼下表面壁面压力出现较为明显的波动。同时,由于机体和捕获翼间的垂直距离沿展向方向逐渐增加,导致该波动在对称面附近最为剧烈,然后随展向位置逐渐增加,压力波动逐渐减弱。
High-pressure capturing wing configurations(HCW)are a family of new concepts which are proposed to meet the design requirements of high volumetric efficiency,high lift coefficient,and high lift-to-drag ratio for hypersonic flight vehicles.In order to investigate the flow characteristics as well as the aerodynamic performance of a typical HCW configuration in a wide-speed range,apreliminary study was conducted in this paper.A cone-truncated cone combination geometry is taken as the simplified computational model.Afterwards,a computational fluid dynamics study was carried out under the freestream flow condition of Mach number 0.92 and 0°angle of attack.Besides,a comparison study was conducted on the basis of the results between the configurations with and without the HCW.Numerical results show that there exists a strong aerodynamic interference between the body and the HCW in the transonic flow regime.The results demonstrated that the area of the flow separation section near the tail part increases significantly as a result of appending the HCW.In the opening channel between the fuselage and the HCW,a shock train appears clearly along the flow direction.This phenomenon leads to that the wall pressure on the lower surface of the HCW presents a significant oscillation.Furthermore,the most obvious oscillation appears in the region near the symmetrical plane,and then it gradually fades with the increase of the spanwise distance.
作者
王浩祥
李广利
徐应洲
崔凯
WANG Haoxiang;LI Guangli;XU Yingzhou;CUI Kai(State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,CAS,CAS,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《空气动力学学报》
CSCD
北大核心
2020年第3期441-447,共7页
Acta Aerodynamica Sinica
基金
中国科学院基础前沿科学研究计划(ZDBS-LY-JSC005)
中国科学院战略性先导专项(XDA17030100)
国家自然科学基金(11572333)。
关键词
高压捕获翼
计算流体力学
跨声速流动特性
流动分离
气动干扰
high-pressure capturing wing
computational fluid dynamics
transonic flow-field characteristics
flow separation
aerodynamic interference
