Numerical and Experimental Studies on the Effect of Axial Spacing on Hydrodynamic Performance of the Hybrid CRP Pod Propulsion System |
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Authors: | XIONG Ying ZHANG Ke WANG Zhan-zhi and QI Wan-jiang |
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Institution: | Department of Naval Architecture, Naval University of Engineering, Wuhan 430033, China;The 92001th Unit of PLA, Qingdao 266011, China;Department of Naval Architecture, Naval University of Engineering, Wuhan 430033, China;The 71187th Unit of PLA, Yantai 266011, China |
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Abstract: | The hydrodynamic performance of a hybrid CRP pod propulsion system was studied by RANS method with SST turbulence model and sliding mesh. The effect of axial spacing on the hydrodynamic performance of the hybrid CRP pod propulsion system was investigated numerically and experimentally. It shows that RANS with the sliding mesh method and SST turbulence model predicts accurately the hydrodynamic performance of the hybrid CRP pod propulsion system. The axial spacing has little influence on the hydrodynamic performance of the forward propeller, but great influence on that of the pod unit. Thrust coefficient of the pod unit declines with the increase of the axial spacing, but the trend becomes weaker, and the decreasing amplitude at the lower advance coefficient is larger than that at the higher advance coefficient. The thrust coefficient and open water efficiency of the hybrid CRP pod propulsion system decrease with the increase of the axial spacing, while the torque coefficient keeps almost constant. On this basis, the design principle of axial spacing of the hybrid CRP pod propulsion system was proposed. |
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Keywords: | hybrid CRP pod propulsion system axial spacing hydrodynamic performance numerical simulation experimental study |
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