基于STAR-CCM+的某无人机流场CFD数值模拟分析
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1.隆鑫通用动力股份有限公司技术中心总体结构与性能研究所;2.陕西科技大学 机电工程学院 陕西 西安

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U467

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CFD Numerical Simulation on Flow Field Characteristics of Unmanned Aerial Vehicle Based on STAR-CCM+
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1.General Structure and Performance Research Institute of R D Center,ChongQing LONCIN Motor Co,Ltd;2.School of Mechanical and Electrical Engineering,ShaanXi University of Science Technology,ShaanXi Xi’an

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    摘要:

    为研究无人机在不同冷却方式的油冷器状态下的流场分布情况,基于计算流体动力学方法,采用流体分析软件STAR-CCM+对风冷油冷器状态下无人机整机流场和水冷油冷器状态下无人机整机流场进行数值模拟,分析各冷却风道风量、速度分布及整机换热量。结果表明:风冷油冷器状态下整机散热能力较好,水冷油冷器状态下,散热器的热风回流较大,对整机散热不利。针对水冷油冷器状态下整机换热量低的问题提出了相应的优化对策,通过3D-CFD优化,将风扇转速提升至2500rpm以上,水冷油冷器整机状态的换热能力可达到风冷油冷器整机状态;在水冷油冷器整机状态上增加散热器前端导风罩并适当提升转速(100rpm左右),水冷油冷器整机状态的换热能力也可达到风冷油冷器整机状态,且整机风量明显提升。研究结果可为无人机油冷器散热方式及散热性能提升的设计及优化提供理论指导和仿真数据支撑。

    Abstract:

    In order to study the flow field distribution of unmanned aerial vehicle (UAV) in different cooling modes of oil cooler, based on computational fluid dynamics method, the flow field of UAV in air-cooled oil cooler state and that in water-cooled oil cooler state are numerically simulated by fluid analysis software STAR-CCM +, and the air quantity distribution, velocity distribution and heat exchange quantity of UAV at different oil cooler states are analyzed. The results show that the cooling capacity of the UAV under the condition of air-cooled oil cooler is better , while the hot-air reflux of the radiator is large under the condition of water-cooled oil cooler, which is unfavorable to the heat dissipation of the UAV. Aiming at the problem of low heat exchange quantity of the UAV under the condition of water-cooled oil cooler, the corresponding optimization countermeasures are put forward. Through 3D-CFD optimization, the fan speed is increased to 2500 rpm, the heat exchange capacity of the UAV under the condition of water-cooled oil cooler can reach that of the UAV with air-cooled oil cooler; at the UAV state with water-cooled oil cooler, the front-end wind cover of the radiator is added and the rotating speed is appropriately increased (about 100 RPM), the heat exchange capacity of the UAV with air-cooled oil cooler can also reach that of the UAV with air-cooled oil cooler, and the cooling air quantity of the UAV is significantly increased. The research results can provide theoretical guidance and simulation data support for the design and optimization of heat dissipation mode and thermal performance improvement of UAV oil cooler.

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黄灿,谭礼斌,袁越锦. 基于STAR-CCM+的某无人机流场CFD数值模拟分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-08-02
  • 最后修改日期:2021-01-03
  • 录用日期:2021-01-09
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