真空吸入式风洞三维非定常流场时空特性  

Space-time Characteristics of Three-dimensional Unsteady Flow Field in a Vacuum Suction Wind Tunnel

作　　者：刘艳欣 朱乐乐 陆文斌 钱海玥 刘越[2] LIU Yanxin;ZHU Lele;LU Wenbin;QIAN Haiyue;LIU Yue(Shanghai Aerospace Electronics Technology Institute,Shanghai 201108 China;Zhengzhou Aircraft Equipment Co.,Ltd.,Zhengzhou 450005,China)

机构地区：[1]上海航天电子技术研究所,上海201108 [2]郑州飞机装备有限责任公司,河南郑州450005

出　　处：《探测与控制学报》2024年第1期105-113,共9页Journal of Detection & Control

摘　　要：为了给真空吸入式风洞的气动优化设计提供参考,应用空气动力学知识和风洞理论,基于Fluent仿真平台,采用计算流体力学(CFD)有限元体积法求解雷诺时均方程(RANS),研究三维非定常流场的时空特性及其演化规律。通过建立收缩段和真空罐的数学模型,确定其特征参数;应用空气动力学知识,抽象流体的边界条件,构建全尺寸三维流体计算域;采用流体力学数值模拟方法,利用试验验证算法的置信度,并进行数值模拟。结果表明,当真空罐容积为2000 m^(3),真空度为3 kPa时可以较好地模拟悬挂发射装置在空中挂飞和投放瞬间的气动载荷。在试验段流场的核心区,其流场品质较好,可以提供0.80 Ma且至少1 s的稳定流场,满足0.40~0.80 Ma且维持至少500 ms稳定流场的设计要求。该研究结论可以为真空吸入式风洞的设计提供理论基础。In order to provide reference for the aerodynamic optimization design of vacuum suction wind tunnel,based on the Fluent simulation platform,computational fluid dynamics(CFD)finite element volume method was used to solve the Reynolds time mean equation(RANS).The spatiotemporal characteristics and evolution law of the three-dimensional unsteady flow field were studied with aerodynamic knowledge and wind tunnel theory.By establishing the mathematical model of the shrinkage section and the vacuum tank,the characteristic parameters were determined.the boundary conditions of fluids are abstracted and full-scale three-dimensional fluid calculation domains are constructed with aerodynamic knowledge.The numerical simulation algorithm of fluid mechanics was used and verified by experiments,the results showed that when the volume of the vacuum tank was 2000 m^(3) and the vacuum degree was 3 kPa,the aerodynamic load of the suspension launcher in the air could be well simulated.In the core area of the flow field in the test section,the flow field quality was good,and a stable flow field of 0.80 Ma could be provided,which meet the design requirements of 0.40~0.80 Ma and maintaining a stable flow field of 500 ms at least.

关 键 词：真空吸入式风洞 计算流体力学 三维非定常流场 数值模拟 流场品质 时空特性 

分 类 号：V214.33[航空宇航科学与技术—航空宇航推进理论与工程]