侧风对舰载直升机悬停性能的影响

针对舰载直升机小速度、大侧滑的飞行状态,采用了旋翼非均匀入流模型,导出了直升机在风场中的运动方程。以某型机为例,对不同风速条件下直升机悬停时的平衡特性进行了计算分析。计算结果表明:左侧风对该机悬停性能影响最大,而尾桨操纵裕度要求左侧风速不能超过30m/s,与同类直升机的飞行数据吻合。分析模型为制订舰载直升机的风险图提供了理论依据。

Performance Analysis of Shipboard Helicopter Resist to Side Wind in Hover

For shipboard helicopter low speed and large sideslip flight conditions, nonuniform inflow model was utilized to predict induced velocity over the rotor plane. Equations of motion of helicopter in wind were derived. For a shipboard helicopter in hovering flight, trim analysis was conducted for de ferent wind speed Results show that left cross wind has a most effect to the helicopter hovering trim performance and should not exceed 30 m/s due to tail rotor pitch control requirement. Analytical results correlate well with a same type of helicopter flight data. The present theoretical model is useful to determine the wind-envelop of shipboard helicopter.