某直升机旋翼采用4片桨叶与5片桨叶的动力学对比分析

COMPARISON AND ANALYSE OF DYNAMICS CONCERNING SOME HELICOPTER' USE 4 BLADE ROTOR OR 5 BLADE ROTOR

旋翼设计包括桨毂构型、旋翼桨叶片数、旋翼直径、旋翼实度、翼型剖面等一系列影响直升机性能的因素。而旋翼桨叶片数的选择,对轻型和中型直升机来讲,4片桨叶旋翼和5片桨叶旋翼具有典型意义。某直升机是5吨级的直升机,在某直升机先期方案中,旋翼设计为4片桨叶,在某直升机旋翼的对法合作中,法方提出将4片桨叶改为5片桨叶。为此,在签订某直升机旋翼对法合作的合同之前,我们对某直升机采用4片桨叶与5片桨叶的动力学性能进行了比较和分析,并得出明确的结论。

Rotor design is comprised of some factors such as hub configuration,blade number,rotor diameter,rotor solidity and airfoil which have effects on helicopter performances.As to the selection of rotor blade number for light and medium helicopter,4 blade and 5 blade rotor are typical.Some Helicopter is of 5 ton level,in pre-design project its rotor was designed as a 4 blade version.Later on,in Sino-French cooperation of rotor design,French party suggested that 4 blade rotor be modified to 5 blade rotor.As a consequence dynamic characteristics of 4 blade and 5 blade rotor have been compared and analysed prior to the signature of contract on Sino-French cooperation of rotor design,and clear conclusions have been drawn.