Study About a New Propulsion System Using CRP(II) (Noise and Flow of the Counter-Rotating Propeller)

CRP를 사용한 추진기관에 관한 연구(II) (CRP의 소음과 유동에 관하여)

Three-dimensional flow measurements were conducted between the rotors of the CRP To understand mean flow phenomena of the CRP's, the results of the three-dimensional measurements were shown. Interaction noise of the CRP, which increases the overall ,level of sound pressure In the new propulsion system, is documented by using the double conditional sampling technique. The rear rotor will increase the axial flow between the rotors of a CRP depending upon the relative locations between the forward and the rear rotor blades. The decay and spreading of the forward wakes and the upstream propagation of the rear blade disturbances are shown along with the interaction of the flow disturbances by the two rotors of blades.