渡槽流态优化数值模型构建与流态复原验证分析

Construction of Aqueduct Flow Regime Optimization Numerical Model and Verification Analysis of Flow Pattern Restoration

采用数值模型对南水北调中线工程澧河渡槽出现的流态紊乱问题开展分析研究,介绍数值模型原理、模型构建范围和方法 ,通过试验对比分析3种网格剖分的收敛性和无关性,使用优化网格剖分后的数值模型,对澧河渡槽2020年6月11日的实测水情数据进行复原模拟,对比发现数值模型模拟复原的渡槽进口、出口及槽身流态与现场观测流态一致,证实构建的数值模型准确,可用于澧河渡槽流态优化措施研究。该数值模型的构建方法可为类似流态优化项目提供参考。

The numerical model is proposed to analyze and study the flow regime disorder in the Lihe aqueduct of the middle route of the South-to-North Water Transfer Project. The principle, model construction scope and method of the numerical model are introduced. The convergence and independence of the three grid divisions are compared and analyzed through experiments. The numerical model after optimized grid division is used, The restoration simulation of the measured water regime data of Lihe aqueduct on June 11, 2020 is carried out. It is found that the flow regime at the inlet, outlet and body of the aqueduct simulated by the numerical model are consistent with the field observed flow regime, which proves that the constructed numerical model is accurate and can be used for the study of flow regime optimization measures of Lihe aqueduct.The construction method of the numerical model can provide a reference for similar flow regime optimization projects.