不同叶顶间隙对泵喷推进器性能的影响  

Numerical investigation of effect of different tip clearance size on the pumpjet propulsor performance

作　　者：鹿麟[1] 李强[1] 高跃飞[1] Lu Lin Li Qiang Gao Yuefel(North University of China, College of Mechatronic Engineering, Taiyuan 030051, China)

机构地区：[1]中北大学机电工程学院,山西太原030051

出　　处：《华中科技大学学报（自然科学版）》2017年第8期110-114,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51175481);国防基础科研基金资助项目(A0820132003)

摘　　要：基于均质多相流的RANS方程与分块网格技术,结合剪切应力SSTk-ω湍流模型,对E779A桨进行了非空化与空化数值模拟,数值计算结果与实验值符合较好,验证了数值计算方法的合理性与有效性.在此基础上,对不同叶顶间隙的泵喷推进器进行了非空化与空化数值模拟计算,重点对叶顶间隙处流场进行了精细后处理.结果表明:未空化时,间隙尺寸越大,泵喷推进器整体效率值越低,最大间隙与最小间隙之间的效率降幅最大为8.62%,叶顶间隙尺寸直接对泵喷推进器的最优进速系数产生影响.当空化发生时,在最优进速系数下的推进器效率下降幅度最小;间隙尺寸越大,空化后的推进器整体效率越低;在较高转速下,较大间隙的空化面积在叶稍处有更为明显的激增量.The non-cavitating and cavitating flows of E779 Apropeller were investigated numerically based on the RANS（reynolds averaged navier-stokes）equations of homogeneous multiphase and high quality multi-block structure grid,combined with the SST（shear stress transport）k-ω turbulence model.The numerical simulation results are in good agreement with the experimental data and the numerical simulation method is verified to be reasonable and reliable.The numerical investigation of noncavitating and cavitating flows of the pumpjet propulsor with different tip clearance size was carried out.The precise post processing of the tip clearance flow was processed.Results show that under the situation of non-cavitating flows,the efficiency of the pumpjet propulsor is dropping with the increasing of the tip clearance size,the maximum decrease reaches 8.62% between the largest and smallest tip clearance size.The tip clearance size affects the optimal advance ratio of the pumpjet propulsor.When the cavitation phenomenon appears,the decline of the efficiency of the pumpjet propulsor is the smallest at the optimal advance ratio.The cavitating efficiency drops more significantly with the increasing of the tip clearance size.Under the condition of high rotational speed,the cavitation area of the larger tip clearance size has a more obvious increment near the rotor blade tip region.

关 键 词：泵喷推进器 叶顶间隙 动力推进系统 数值模拟 顶隙泄涡 

分 类 号：U664.3[交通运输工程—船舶及航道工程]