临近空间高超声速气动布局研究

临近空间飞行器存在多种不同的布局形式，而针对不同气动布局概念之间的系统研究则相对缺乏．采用数值模拟方法，对临近空间飞行器三类典型气动布局概念--扁平升力体、翼身融合体和翼身组合体开展系统的计算与分析，通过对比不同布局的升阻特性、静稳定特性、舵效特性等，获得不同布局概念气动性能优劣的初步评估．结果表明：扁平升力体的升力和阻力比较大，升阻比最低，容积率则最大，侧向稳定性最好；翼身组合体的升力和阻力比较小，升阻比最高，容积率比较低，侧向静稳定性较差；翼身融合体布局的特性介于翼身组合体和扁平升力体布局之间．

Investigation on Near Space Hypersonic Aerodynamic Configuration

There are various configuration forms of near space vehicles, however, systematic studies on different aerodynamic configurations are deficient. Numerical simulation method was used to calculate and analyze the aerodynamic characteristics of flat lifting body, blended wing-body and discrete wing-body configurations, which are three typical configurations of near space vehicles. Lift-drag characteristics, stability characteristics and elevator control effectiveness of different configurations were compared to obtain preliminary evaluation of the merits of aerodynamic characteristics. The results indicate that flat lifting body has larger lift and drag, lowest lift-drag ratio, biggest volume rate and best lateral stability. Discrete wing-body has smaller lift and drag, highest lift-drag ratio, lower volume rate and bad lateral stability. The aerodynamic characteristic of blended wing-body is between flat lifting body and discrete wing-body.