结构入水空泡流动的高精度SPH模拟研究

项目名称： 结构入水空泡流动的高精度SPH模拟研究

项目编号： No.U1530110

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 刘谋斌

作者单位： 北京大学

项目金额： 68万元

中文摘要： 本申请针对“培育项目”的明确目标课题-“8.结构入水空泡现象研究”提出，旨在基于高精度SPH方法，发展有效的流固耦合、两相流动及无反射边界算法，并在SPH方法中引入合适的紊流模型与空泡模型，通过理论分析、模型实验及其他CFD数值结果的验证，建立能够有效模拟结构入水及入水空泡流动的数值模拟方法，以分析和研究结构入水过程中空泡的萌生、发育和溃灭的机理及其对水体阻力与结构载荷特性的影响，解释现有数值结果和实验观察的差异。希望通过本项目的研究，为结构入水及入水空泡问题提供科学的数值模拟方法和新技术、新思路，对结构入水及入水空泡进行有效的预测，从而趋利避害，并帮助指导设计相关的入水结构。

中文关键词： 入水；空泡；紊流；流固耦合；光滑粒子动力学

英文摘要： This proposal is developed according to a NSAF targeted cultivation project Investigations on water entry and its associated cavitation phenomenon. The purpose of this project is to develop efficient fluid-solid structure interaction algorithm, two-phase flow algorithm and non-reflective boundary algorithm based on a high order smoothed particle hydrodynamics (SPH) method, to comparatively investigate turbulence models and cavitation models and incorporate suitable models for simulating water entry of solid objects into the SPH solver. The numerical methods, computational algorithms and physical models will be verified by analytical, experimental and other CFD results, and then applied to investigate water entry and its associated cavitation phenomenon with bubble formation, growth and collapse. It aims to provide a new numerical method for modeling water entry and its associated cavitation phenomenon, to provide new ideas and techniques to predict inherent physics and to provide guidance for optimally designing structures for water entry.

英文关键词： Water Entry;Cavitation;Turbulence ;Fluid-Structure Interaction;Smoothed Particle Hydrodynamics