Numerical aerodynamic computation of unmanned aerial vehicle
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摘要: 使用三维造型软件和计算流体力学软件对某型无人机进行了气动力数值模拟,得到小迎角范围内的升、阻力系数和力矩系数以及无人机表面的压力、密度和来流速度分布情况,同时,对该无人机进行了气动力的工程经验估算,并将估算结果与数值计算结果进行对比分析.研究表明,数值计算能够较好的模拟小尺度低速流场流动,对无人机的研制能起到重要的作用.计算结果为下一步无人机的气动外形优化设计提供了理论依据和重要参考.Abstract: Numerical simulation of an unmanned aerial vehicle (UAV) was carried out by 3D modeling and computational fluid dynamics (CFD) software, and then the coefficients of lift, drag and moment with a small angle of attack (AoA) variety as well as the distribution of pressure,density and velocity on the surface of UAV were obtained. Empirical estimation was also conducted and the results of the two methods were compared with each other. It shows that CFD has a satisfactory accuracy in the small-scale, low velocity flow simulation, and it plays an important role in the development of the UAV. The simulation results can provide a theoretical reference to the further optimization development of the UAV.
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Key words:
- lift drag coefficient /
- numerical methods /
- sempirical estimation
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