临近空间再生燃料电池储能系统散热风扇性能

针对平流层飞艇再生燃料电池储能系统的风冷散热组件，采用Fluent计算散热风扇在设计飞行高度不同转速条件下的风压、流量、静压效率等性能参数。进而针对海拔0~20km高度的环境温度和压力变化，计算20kW散热能力条件下散热组件风量需求及其对应风扇转速、功耗等变化趋势。在此基础上，进行散热组件不同海拔高度环境下的性能试验，风扇模型计算结果和试验数据吻合较好。结果表明风冷散热组件能够满足再生燃料电池储能系统在包括起飞、高空驻留和降落在内的整个任务周期的散热要求。

Performance of a Cooling Fan for Radiator of RFC Energy Storage System for Near Space Application

A computational model with Fluent is taken to investigate the performance of cooling-fan for the radiator module of a RFC energy storage system of stratospheric airship. The performance parameters including wind pressure, flow rate and static pressure efficiency are simulated under different rotational speed at the altitude of 20km. Then, the cold flow rate demand for 20kW heat dissipation rate is analyzed, and the varying trends of rotational speed and power consumption are simulated for different altitude from sea level to 20km under obviously varying pressure and temperature. Based on the guidance of simulation, environmental simulation experimentation is taken under different altitudes, and results of the fan model accord well with the experimental data. The result shows that, the radiator module fulfils the need of heat dissipation for RFC of stratospheric airship during the whole mission period including take-off, high altitude parking and landing.