Governed by: Ministry of Industry and Information Technology of the People's Republic of China Sponsored by: Northwestern Polytechnical University Chinese Society Aeronautics and Astronautics Address: Aviation Building,Youyi Campus, Northwestern Polytechnical University
In order to investigate the effect of crosswind on helicopter ditching performance,designing of a crosswind-fan system and ditching experiment of a helicopter model were conducted , investigated the effect of blade angle and distance between fans on crosswind velocity,then investigated the effect of crosswind velocity on attitude angle,overload and bottom-pressure of the helicopter model。The results show that,the blade angle equal 18 degree is better than 15 degree and 20 degree.The crosswind velocity uniform distribution when L/D equal 1.66.The crosswind has almost no effect on pitch angle but makes the roll angle amplitude larger and more difficult to be stabilized.When the crosswind velocity increases,the overload,the bottom-pressure at the plane of symmetry and near crosswind-fan system increases,but the bottom-pressure far from crosswind-fan decreases.
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Jiao Jun, Wei Fei, Wang Mingzhen, Sun Feng. MODEL Experimental?Study?on?the?helicopter ditching WITH CROSSWIND[J]. Advances in Aeronautical Science and Engineering,2019,10(S1):19-23