具有自由液面的圆柱泄涡抑制机理研究

项目名称： 具有自由液面的圆柱泄涡抑制机理研究

项目编号： No.11472087

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 戴绍仕

作者单位： 哈尔滨工程大学

项目金额： 80万元

中文摘要： 随着世界各国全面推进海洋强国的战略，全球新一轮竞争的前沿阵地已由近岸浅海向远深海全面推进，因此海洋工程各类结构物都面临着严峻的挑战。由旋涡发放诱发的传统圆柱型结构物的振动（振荡）、疲劳等问题在深海海域尤显突出，尤其是具有自由液面的圆柱结构。因其尾涡发放涉及边界层的分离、吸气旋涡的运动、旋涡的旋滚和背压区液面的陡降等现象，所以其抑制方法研究成为新的难点。本课题在提出抑制板消涡概念的基础上，基于OPENFOAM代码建立气-液两相涡流的三维数学计算模型，采用数值计算和试验测试相结合的研究方法，得出变参数时圆柱尾流的演变特性，壁面压力变化特性和水动力参数的变化规律，旨在提出抑制板的最优结构参数以有效抑制泄涡，为海洋工程中圆柱型结构的设计与应用提供科学的依据和技术支持。

中文关键词： 自由液面；旋涡发放；流动控制；抑制机理与性能

英文摘要： With the world comprehensively promoting the maritime power strategy, the global competition has promoted from the offshore to the deep water, so all kinds of physical structures of marine engineering are facing severe challenges. The issues of vibration, oscillation and fatigue induced by vortex shedding for the traditional cylindrical structures are obviously remarkable, especially for cylindrical structures with free surface. Wake vortex shedding of cylinderical structures with free surface closely relates to some special phenomena: the separation of boundary layer, tiny bubbles suction, vortex rolling and deep drop of back pressure area, so the suppression of it is becoming a new research hotspot. In this project, based on the concept of eliminating vortex by suppression plate and OPENFOAM source, three-dimensional mathematical computational model of gas-liquid two phases for vortex shedding will be built, and then the study on the mechanism of anti-vortex of suppression plate will be carried out by combining the advanced numerical computational method with the experimental testing method. The evolution characteristics of wake flow and variation of wall pressure and hydrodynamic parameters with the shape parameters will be obtained. The aim of this project is to pose the optimal structure parameters of suppression plate to suppress vortex shedding, and then provides scientific basis and technical support for the cylindrical structural design and application in the field of deep water engineering.

英文关键词： Free surface;Vortex shedding;Flow control;Mechanism of suppression and performance