Numerical Simulation of Cavitation Phenomena for Hybrid Contra-Rotating Shaft Propellers

9th International Symposium on Cavitation

Kim, Sung-Hoon^1 ; Choo, Sung-Han^2 ; Park, Jeong-Yong^2 ; Choi, Gil-Hwan^2

Ship Performance Research Department, HHI, Seoul, Korea, Republic of^1

Performance Evaluation Research Department, HHI, Ulsan, Korea, Republic of^2

关键词: Cavitating flow;    Cavitation flow;    Contra-rotating;    Load distributions;    Podded propellers;    Turning angles;    Unstable cavity;    Unsteady reynolds-averaged navier-stokes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012132/pdf
DOI  :  10.1088/1742-6596/656/1/012132

来源: IOP

【 摘 要 】

This paper deals with a numerical simulation of cavitation flow around a hybrid contra-rotating shaft propeller operating in wake field. The simulation for the cavitating flow is performed for straight operating and turning condition of podded propeller located behind the main propeller using unsteady Reynolds-Averaged Navier-Stokes. The behavior of the main propeller is almost similar regardless of the turning angle. In contrast, the cavitation behavior of the podded propeller depending on the turning angle appears to be entirely different due to the change of the load distribution on the podded propeller. At the large angle of the turning condition, the unstable cavity flow due to the large amount of cavitation and the hub vortex separated from the forward propeller as well as face cavitation is observed. Thus, a great caution on the cavitation phenomena is needed when designing and operating the HCRSP.