新型旋翼推进式无人飞艇气动特性研究

为了解新型旋翼推进式无人飞艇推进旋翼与气囊之间的气动作用,通过流体仿真、采用SIMPLE算法和Spalart-Allmaras湍流模型对两种旋翼安装方案的气动特性进行了模拟分析,并初步确定了旋翼安装方式及结构。数值模拟结果表明,推进式安装方式推进效率远比拉进式安装方式要高,旋翼与气囊之间的距离对推进效率有一定的影响。

Research on aerodynamic characteristics of a new type unmanned airship with propelled rotor

In order to understand the aerodynamic interaction between the propelling rotor wing and the airbag of the new type unmanned airship with rotor propelled,aerodynamic characteristics of the rotor wings installed with two schemes was simulated and analyzed with the fluid simulation method,the SIMPLE algorithm and the Spalart-Allmaras turbulence model.Then the rotor arrangement and installation structure were preliminarily determined.The numerical simulation results show that for the rotor on the airbag,the propulsive efficiency of the propulsion arrangement form is higher than the drawing-in arrangement form.The distance between the rotor and the airbag has a certain influence on the propulsion efficiency.