磁流体条件下气动热特性研究  

Study of aerodynamic heat characteristics under magnetofluid conditions

作　　者：王欣[1] 李旭东[1] 甄华萍[1] 史增民 许丁[2] WANG Xin;LI XuDong;ZHEN HuaPing;SHI ZengMin;XU Ding(Institute of Space Long March Vehicle,Beijing 100076,China;School of Aerospace,Xi’an Jiaotong University,Xi'an 710049,China)

机构地区：[1]北京航天长征飞行器研究所,北京100076 [2]西安交通大学航天航空学院,西安710049

出　　处：《中国科学：物理学、力学、天文学》2021年第10期71-80,共10页Scientia Sinica Physica,Mechanica & Astronomica

摘　　要：运用一种适用于高马赫数、低雷诺数流动条件下的磁流体力学(MHD)计算方法研究气动力/热特性.采用经典Hartmann流动验证计算方法的有效性和准确性,通过布置磁场的分布形式、改变磁场强度研究磁场对磁流体流动的影响,包括对激波的控制作用及对壁面压力和热流密度的影响,进而得到磁流体条件下的气动热加热特性.通过研究,得到以下结论:磁场对流动的影响主要通过无量纲互涉参数体现,给定来流条件的情况下,通过提高电导率或增强磁感应强度都可以起到增强磁场效应的效果;磁场对流场作用主要表现为磁阻滞效果,引入磁场后流场变化更为平缓,随着机体内磁场强度增大,激波的脱体位置不断前移、强度逐渐变弱,飞行器表面压力不断升高、热流逐渐下降.This article uses a magnetohydrodynamics calculation method suitable for high-Mach number and low-Reynolds number flow conditions.The classical Hartmann flow is used to verify the validity and accuracy of the calculation method.By arranging the distribution form and changing the intensity of the magnetic field to study the influence of the magnetic field on the magnetic fluid flow,including the control effect on the shock wave and influence on wall pressure and heat flow density,the aerodynamic heating characteristics under magnetic fluid conditions are obtained.The following conclusions are obtained:the influence of the magnetic field on the flow is mainly reflected by the interaction parameters;given the incoming flow conditions,the effect of the magnetic field can be enhanced by increasing the electrical conductivity or magnetic induction intensity.The effect of the magnetic field on the flow field is mainly manifested as a magnetic retardation effect;after the introduction of the magnetic field,the flow field changes more smoothly,and as the intensity of the magnetic field in the aircraft increases,the shock wave’s detachment position continues to move forward and its intensity gradually weakens.The surface pressure on the aircraft continues to increase,and the heat flow gradually decreases.

关 键 词：磁流体力学 磁场 气动热 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程] O361.3[理学—流体力学] V411[理学—力学]