一种可倾转涵道垂直起降飞行器需用功率研究

Study on required power of a tilt rotor ducted fan V / STOL aircraft

基于非结构网格,对不同桨距的涵道风扇和一种可倾转涵道垂直起降飞行器的流场进行数值求解,研究影响涵道风扇拉力和功率的因素,得出了相应的规律和结论。对比了这种可倾转涵道垂直起降飞行器与直升机在不同飞行状态的功率消耗。这种可倾转涵道垂直起降飞行器在悬停状态时功耗为直升机的1.7~2.0倍,但以20 m/s和30 m/s平飞时单位升力所需功率仅为直升机的1/4和1/2。综合效果来看,通过选取合理设计点,这种飞行器能够兼顾垂直起降和水平飞行的性能,相同功耗下比直升机具有更大航程的优势。

The factors affecting ducted fan thrust and power were simulated through unstructured mesh technique. And the power consumption comparison of a tilt rotor ducted fan V/STOL aircraft and helicopters were investigated in different states individually. The power consumed by this tilt rotor ducted fan V/ STOL in hover state is 1.7-2.0 times as that consumed by helicopters, while just one quarter and a half as that consumed by helicopters at the speed of 20 m/s and 30 m/s respectively. To sum up in a comprehensive way, with the rational design point, this vehicle can take off vertically and fly horizontally, which can improve air-range compared with helicopters at the same power consumption.