导管桨内流场及涡特性DES模拟  

Detached eddy simulations of internal flow fields and vortex characteristics of ducted propellers

作　　者：龚杰[1] 郭春雨[1] 赵大刚[1] 宋科委 钟文军 GONG Jie;GUO Chunyu;ZHAO Dagang;SONG Kewei;ZHONG Wenjun(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China;Offshore Oil Engineering Co. Ltd., Tianjin 300384, China)

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001 [2]海洋石油工程股份有限公司,天津300384

出　　处：《哈尔滨工程大学学报》2019年第8期1381-1386,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51679052,51639004,51709060);装备预研重点实验室基金项目(61422230203182223010);国家重大科技专项经费项目(2016ZX05057020)

摘　　要：为研究导管桨内部流动及涡结构组成与分布特性,本文基于分离涡模拟(DES)方法对导管桨内流场及涡特性进行模拟,数值模拟为三维黏性、不可压缩的非稳态计算,采用滑移网格技术实现导管桨的敞水性能试验,应用体渲染方式展示内流场空间涡结构。导管桨水动力性能计算结果与模型试验吻合良好,数值模拟结果表明:导管内壁区域流动复杂,频域内导管壁面压力脉动在叶频及其倍数处出现连续峰值;分离涡模拟方法能有效模拟导管桨内流场中的剪切层涡、叶梢涡、叶片脱落涡和叶根涡等不同涡结构,导管的存在导致梢涡形态发生变化,涡量更大面积分布于导管内壁,有助于导管回收螺旋桨尾流涡能,以提高推进效率。The internal flow fields and vortex characteristics of a ducted propeller are simulated by using the detached eddy simulation(DES) method to analyze the internal flow of ducted propellers and the components and distribution of vortex structures. Numerical simulations are performed as unsteady, three-dimensional, viscous, and incompressible calculations. Sliding mesh technology is employed in the open-water test simulation, and the volume-rendering method is used to present the spatial structures of internal vortices. The numerical results for hydrodynamic performance are in good agreement with the model test results. Results show that the flow near the inner surface of the duct is complex, and the peak values of surface pressure fluctuation occur continuously in the blade-passing frequency and its multiples in the frequency domain. The DES model can effectively simulate different ducted propeller vortex structures, such as duct shear-layer, blade-tip, blade-shedding, and blade-root vortices. Changes in tip vortex morphology and vorticity distribution cover a large area of the inner surface of the duct. All of the above factors contribute to the recovery of wake energy and improve propulsion efficiency.

关 键 词：导管桨 内流场 分离涡模拟 压力脉动 涡结构 

分 类 号：U674.21[交通运输工程—船舶及航道工程]