非均匀流下桨叶侧斜对螺旋桨空化和压力脉动的影响  

Influence of blade skew on propeller cavitation and pressure pulsation in non-uniform flow

作　　者：何朝晖 韩承灶 季斌 程永光[1] Chao-hui He;Cheng-zao Han;Bin Ji;Yong-guang Cheng(State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University)

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《水动力学研究与进展（A辑）》2022年第2期152-158,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(52176041)。

摘　　要：侧斜对螺旋桨的水动力性能及空化性能均有十分重要的影响,该文基于k-ωSST湍流模型和Zwart-Gerber-Belamri空化模型对非均匀流条件下四个不同侧斜螺旋桨周围的非定常空化流动情况进行了数值模拟研究。首先进行了螺旋桨水动力性能和空化特性计算,通过与试验结果对比,评估了网格数量的影响以及计算方法的可靠性。在此基础上探讨了侧斜对空化形态以及压力脉动的影响,结果表明:适当地增大侧斜可以使螺旋桨的平均推力得到提升。此外,侧斜的增加可以使桨叶徐徐切入船尾伴流,从而使螺旋桨空化体积的变化趋于平缓,进而有效地降低压力脉动,抑制振动和噪声,提高船舶运行的安全性和舒适性。The blade skew has a great influence on the hydrodynamic performance and cavitation performance of propeller.Based on k-ω SST turbulence model and Zwart-Gerber-Belamri cavitation model,the unsteady cavitation flow around four different skew propellers in non-uniform flow is numerically simulated.Firstly,the hydrodynamic performance and cavitation characteristics of propeller are calculated.By comparing with the experimental results,the influence of grid number and the reliability of the numerical simulation method are evaluated.On this basis,the influence of skew on cavitation morphology and pressure fluctuation is discussed.The results show that the average thrust of propeller can be improved by properly increasing the skew angle.In addition,the increase of skew can make the blades cut into the stern wake slowly,so that the change of propeller cavitation volume tends to be gentle,thus effectively reducing pressure fluc tuation,suppressing vibration and noise,and improving the safety and comfort of ship operation.

关 键 词：螺旋桨侧斜 空化 压力脉动 数值模拟 

分 类 号：U661.1[交通运输工程—船舶及航道工程]