宽域飞行器垂直发射状态下的振荡气动特性研究  

Study on aerodynamic oscillating characteristics of wide-speed aircraft during vertical launch

作　　者：孙志欣 刘汉涛[1] 李海桥[1] Sun Zhixin;Liu Hantao;Li Haiqiao(School of Energy and Power Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学能源与动力工程学院,太原030051

出　　处：《空天技术》2023年第2期20-27,57,共9页Aerospace Technology

基　　金：国家自然科学基金面上项目(51976203);山西省基础研究计划项目(20210302124627)。

摘　　要：宽域飞行器经历低速起降、亚/跨/超/高超声速爬升和巡航过程,具有宽速域、高空域、飞行环境复杂的特征,已成为当前高超声速技术领域的重要发展方向。针对宽域飞行器垂直发射过程中遇到的侧风干扰和模型振荡非定常问题,采用基于动网格和转捩修正SST k-ω湍流模型的URANS计算方法,对宽域飞行器低速大攻角状态进行了仿真计算。研究了飞行器在发生小幅振荡过程中,背风区涡结构分布和非定常演变规律,获得了飞行器气动力/力矩的变化规律以及飞行器表面的压力载荷分布特征,给出了关键位置监测点上的时域和频域特性,这些工作为评估以及优化控制宽域飞行器发射过程中的气动风载环境提供了参考。The wide speed range vehicle has applicability of the full envelope of flight speed and large airspace,the flight process involves sub/span/super/hypersonic climb and cruise process,so the vehicle encounters a complex flight environment.Now this has become an important development direction in the field of hypersonic technology.Considering the crosswind disturbance and unsteady effects during vertical launch,a thorough 3D unsteady computational fluid dynamic analysis is performed based on moving-mesh method and the k-ωshear stress transport turbulence model at low velocity and high angle of attack.Flow unsteady effects and vortex structures in shadow area are explored during the oscillatory process in a small angle.At the same time,the tendency of aerodynamic forces and moments and the unsteady characteristics of the pressure load distribution on the vehicle surface are analyzed,especially property in time domain and frequency domain at critical locations of the vehicle.These works have provided a reference for accurately predicting the load environment during vehicle launch and optimizing control.

关 键 词：宽域飞行器 垂直发射 振荡翼型 非定常效应 风载 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]