地面效应影响下的高速火箭橇气动特性数值与风洞试验研究  

Numerical and wind tunnel test research on aerodynamic characteristics of high-speed rocket sled under the influence of ground effect

作　　者：赵鹏刚 刘振[1] 党天骄 孙亚川 孙也 ZHAO Peng gang;LIU Zhen;DANG Tian-jiao;SUN Ya-chuan;SUN Ye(State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学机械结构强度与振动国家重点实验室,西安710049

出　　处：《计算力学学报》2023年第2期314-322,共9页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(u20b2002)资助项目.

摘　　要：精确预示地面效应下高速火箭橇的气动特性及流场规律对高速火箭橇的设计和评估具有重要意义。本文应用有限体积方法,研究了湍流模型对火箭橇气动特性计算精度的影响,建立了基于realizable k-ε湍流模型的火箭橇气动特性的高精度数值计算方法;结合风洞试验方法,研究了雷诺数和地面效应对高速火箭橇流场流动规律的影响,分析了火箭橇气动特性。结果表明,火箭橇阻力系数随雷诺数增大而减小,升力系数和俯仰力矩系数随雷诺数增大而增大,但雷诺数对高速火箭橇气动特性的影响较小;地面效应会使火箭橇流场发生激波-激波干扰、激波-边界层干扰和激波反复反射等复杂气动现象,大幅提升了火箭橇的升力系数和俯仰力矩系数,但对阻力系数的影响较小。研究为高速火箭橇气动外形的设计及运动稳定性的评估提供依据。Precisely predicting the aerodynamic characteristics and the flow field of a high-speed rocket sled under-ground effects is of great significance to the design and evaluation of the sled.The finite volume method was used to study the influence of turbulence model on the calculation accuracy of rocket sled aerodynamic characteristics,and a high-precision numerical method for the rocket sled aerodynamic characteristics based on the realizable k-εturbulence model was established.In combination with the wind tunnel test,the influence of Reynolds number and ground effects on the flow field characteristics of a high-speed rocket sled was studied,and the aerodynamic characteristics of the sled were analyzed.The results showed that the drag coefficient decreased with the increasing Reynolds number,while the lift and pitching moment coefficients increased.However,the Reynolds number had little influence on the aerodynamic characteristics of the sled.Ground effects could induce the interference between shock waves,the interference between the shock wave and the boundary layer,the shock wave repeated reflection,and other complex aerodynamic phenomena in the flow field of the rocket sled,which significantly improved the lift and pitch moment coefficients,but had little influence on the drag coefficient.This study provided a basis for the design of the aerodynamic shape of a high-speed rocket sled and the evaluation of the stability.

关 键 词：高速火箭橇 风洞试验 有限体积法 雷诺数 地面效应 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程] O355[理学—流体力学]