Helicopter rotor performance can be significantly altered by ice accretion which directly degrades the handling qualities and safety during flight. To obtain understanding into the effect of ice accretion on a helicopter rotor in forward flight under different icing environments, an experimental campaign was conducted in an icing wind tunnel using a rotor model with diameter at 2 m. Research was emphasized on revealing effect of liquid water content and static temperature on the rotor performance degradation. The dynamic thrust and torque of the rotor were measured by a six-component balance. Ice shape of the airfoils at specific rotor blade spanwise locations was obtained through the ice cutting process; meanwhile, the entire ice topology on the blade was scanned by means of the three-dimensional scanning technique. Results showed that ice was mainly accreted on the leading edge and lower surface of the blade. The static temperature of a icing cloud has a noticeable effect on the regime of accreted ice. The ice formation was transparent glaze at −8°C and transformed to milky rime when changed the static temperature to −20°C. Comparing to rime ice, the glaze ice on the blade is more influential to the rotor performance degradation. Particular attention is given to the fact that under extreme icing conditions, over 30% degradation of transient rotor thrust was observed.

积冰会显着改变直升机旋翼的性能，积冰会直接降低飞行过程中的操纵质量和安全性。为了了解积冰对直升机旋翼在不同结冰环境下向前飞行的影响，在结冰风洞中使用直径为 2 m 的旋翼模型进行了实验活动。重点研究揭示液态水含量和静态温度对转子性能退化的影响。转子的动态推力和扭矩由六分量天平测量。翼型在特定转子叶片展向位置的冰形是通过冰切割过程获得的；同时，通过三维扫描技术对叶片上的整个冰拓扑结构进行扫描。结果表明，冰主要积聚在叶片前缘和下表面。结冰云的静态温度对积冰的状态有显着影响。冰层在-8℃时为透明釉，当静态温度变为-20℃时转变为乳白色霜。与雾冰相比，叶片上的釉冰对转子性能下降的影响更大。特别注意在极端结冰条件下，观察到瞬态转子推力下降超过 30% 的事实。与雾冰相比，叶片上的釉冰对转子性能下降的影响更大。特别注意在极端结冰条件下，观察到瞬态转子推力下降超过 30% 的事实。与雾冰相比，叶片上的釉冰对转子性能下降的影响更大。特别注意在极端结冰条件下，观察到瞬态转子推力下降超过 30% 的事实。