限制航道中计及航速影响的船舶操纵水动力数值预报研究

项目名称： 限制航道中计及航速影响的船舶操纵水动力数值预报研究

项目编号： No.51309152

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 邹璐

作者单位： 上海交通大学

项目金额： 25万元

中文摘要： 本项目采用基于CFD的数值模拟方法，计及航速引起的自由面兴波及船体下蹲影响对限制航道中的船舶操纵水动力进行数值预报。采用VOF法模拟自由面兴波，结合动网格技术更新网格、调整船舶浮态以模拟船体下蹲。由数值模拟结果考察自由面兴波及船体下蹲对限制航道中船舶操纵水动力的影响，总结限制航道中计及航速影响的浅水效应、岸壁效应对船舶操纵水动力的作用规律，确定保证船舶在限制航道中安全航行的安全航速，并基于得到的流场信息，获得对限制航道中船舶操纵水动力物理机理的深入认识。同时，结合约束模试验，采用验证和确认方法，分析数值模拟中的误差和不确定度，以验证数值模型的有效性，并提高数值预报结果的可靠性。通过本项目的研究，开发得到计及航速影响的限制航道中船舶操纵水动力数值预报方法，对限制航道船舶操纵水动力作出比较精确的预报，为我国制定内河航道船舶安全航速标准提供依据，为我国内河航道船舶航行安全提供保障。

中文关键词： 限制航道；航速影响；操纵水动力；计算流体动力学；验证和确认

英文摘要： Using a CFD-based numerical simulation method, this project predicts the hydrodynamic forces on manoeuvring ships in confined waterways, including the influence of free surface elevation and ship squat due to the ship-speed effects. The free surface elevation is modelled by Volume of Fluid method, and the ship squat is simulated with the dynamic mesh technique to update the mesh and adjust the ship attitude. From the results of numerical simulations, the influence of free surface elevation and ship squat on the hydrodynamic forces acting on manoeuvring ships in confined waterways is investigated, and the tendencies of shallow-water effects and bank effects on hydrodynamic forces with the influence of ship speed are summarized. On this basis, the safe speed of ship in confined waterways is determined. Comprehensive understandings of the physical mechanism of the hydrodynamic forces in confined waterways are obtained according to the predicted details of the flow field. Meanwhile, to validate the numerical model and to improve the reliability of the numerical predictions, the error and uncertainty in numerical simulations are estimated by verification and validation in combination with the captive model test data. From this project, it is expected to develop a reliable numerical method for achieving more accurate

英文关键词： Confined waterways；effects of ship speed；manoeuvring hydrodynamic forces；Computational Fluid Dynamics；verification and validation