Experimental and numerical analysis of the local scour flow field and sediment transport around a cylindrical pier

圆柱墩周围局部冲刷流场及泥沙运移的实验与数值分析

• 批准号: 233196822
• 负责人: Professor Dr.-Ing. Michael Manhart
• 金额: --
• 依托单位: Professur für Hydromechanik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/233196822?language=en
• 关键词: Experimental; numerical; analysis; local; scour

This project aims at clarifying deficits and uncertainties in understanding and modelling the local scour development around bridge pier in mobile river beds. The focus of the investigation lies in an analysis of the flow field and its modification with increasing scour depth and in dependence of the Reynolds number. Published formulae for modeling erosion and erosion onset will be analysed. Flow fields will be simulated by space-time resolved numerical simulation (Large Eddy Simulation) and measured in a laboratory experiment by laser-based techniques (LDA, PIV). The experimental design is in line with the numerical simulations to enable the experimental results to be used for validation of the numerical ones. Thus, valid and reliable data on flow field and wall shear stresses will be obtained. By space-time analysis of these data, a link between flow field and erosion rate will be established on the local and instantaneous scale.

本项目旨在澄清理解和模拟移动的河床中桥墩周围局部冲刷发展的缺陷和不确定性。研究的重点在于分析流场及其随冲刷深度增加和雷诺数变化的变化。将分析已发表的侵蚀和侵蚀开始建模公式。流场将通过时空分辨数值模拟（大涡模拟）进行模拟，并通过基于激光的技术（LDA，PIV）在实验室实验中进行测量。实验设计与数值模拟一致，使实验结果可用于验证数值模拟结果。从而获得有效可靠的流场和壁面剪应力数据。通过对这些数据的时空分析，将在局部和瞬时尺度上建立流场和侵蚀速率之间的联系。