舰艉流场主动控制对直升机配平操纵的影响

Effect of ship airwake active control on helicopter trimmed controls

为研究舰艉流场对直升机配平操纵的影响,采用了数值模拟和直升机飞行动力学模型相结合的方法,通过computational fluid dynamics(CFD)数值模拟得到舰艉流场,并探究加入流场主动控制下的舰艉流场特征,同时考虑舰艉流场对直升机的影响,建立耦合的直升机舰面起降飞行动力学模型。计算得到直升机在有无艉流下相对悬停配平结果,并进一步对比分析有无流场主动控制对直升机配平操纵的影响。结果表明:舰艉流场对直升机起降影响显著,且相比较于无控制时舰艉流场对直升机操纵的干扰,增设吹气装置可有效抑制舰艉流场下洗,减小所需总距操纵杆量7.8%,脚蹬操纵量7.5%,改善其他相应操纵,减轻驾驶员操纵负荷。

In order to investigate the effect of ship airwake on helicopter trimmed controls,a method of combining numerical simulation and helicopter flight dynamics model was adopted.The ship airwake was obtained by computational fluid dynamics(CFD)numerical simulation method,and the characteristics of ship airwake under active control were explored;at the same time,considering the effect of ship airwake on helicopter,the flight dynamics model coupled with the ship airwake was established.The results of relative hovering trim with/without airwake were calculated,and the effect of active control on helicopter trimmed controls was further compared and analyzed.The results showed that the ship airwake had a significant impact on the helicopter take-off and landing,compared with the interference of the ship airwake on the helicopter controls when there was no control,the addition of the blowing device can effectively suppress the downwash of the ship airwake,reduce the required collective pitch control by 7.8%and pedal control by 7.5%,improve other corresponding controls and alleviate the pilot control load.