Experimental investigation of ship stern flow field through Stereo-PIV

被引：0
|
作者：
She W. [1 ]
Zhou G. [1 ]
Wu T. [1 ]
Zhang D. [1 ]
Zhen Q. [1 ]
机构：
[1] College of Shipbuilding Engineering, Harbin Engineering University, Harbin
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2019年 / 40卷 / 01期
关键词：
Bilge vortex; Propeller cap vortex; Ship stern flow field; Stereoscopic particle image velocimetry system; U-shaped stern with a channel; Vortex strength; Vorticity;
D O I：
10.11990/jheu.201708086
中图分类号：
学科分类号：
摘要：
This study aims to understand the complex flow mechanism of ship wake filed.A stereoscopic particle image velocimetry (SPIV) system is established in the tank pool of Harbin Engineering University. The shrinkage ratio model of a single-propeller merchant ship with U-shaped stern is used as the study object to measure the stern flow field of the ship at different sections under the design conditions. Measurement results clearly show the flow structure of bilge vortex, propeller hub cap, and "hook" velocity contours. The three-dimensional velocity, vortex strength, and vorticity of the ship's stern flow field at different cross-section positions are also compared and analyzed. Compared with the U-shaped aft wake flow field, the U-shaped stern with a channel flow field in its structure has stronger aft vortex and "hook" speed contour. However, the stern vortex and the "hook-like" structure exhibit obvious inward shrinkage tendency. The boundary layer flow field shrinks due to the effect of the hull surface with inward depression. © 2019, Editorial Department of Journal of HEU. All right reserved.
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页码：26 / 33
页数：7
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