基于非恒定流模型的山洪沟水面线计算  

Unsteady flow model-based calculation of mountain torrent ditch water level

作　　者：张大伟[1,2] 权锦[1] 马建明[1,2] 申瑜[3] 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部防洪抗旱减灾工程技术研究中心,北京100038 [3]山西省水文水资源勘测局,山西太原030001

出　　处：《水利水电技术》2016年第2期123-127,共5页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金资助项目(51509263);"十二五"国家科技支撑计划课题(2012BAK10B04);北京市科技计划课题"北京市山洪泥石流预测预警关键技术研究与示范"(Z141100003614052);中国水利水电科学研究院科研专项(防集1240)

摘　　要：本文将具有良好激波捕捉能力的Godunov格式离散圣维南方程组建立的一维非恒定流模型用于山洪沟水面线的分析计算。首先通过混合流算例验证了该模型具有良好的模拟间断水面和流态过渡的能力,随后将该非恒定流模型用于刘家舍窠山洪沟、梁家岔山洪沟和红花坪山洪沟的水面线计算。分析认为计算结果合理,模型较好地模拟了陡坡和断面变化剧烈情况下出现的急流和流态过渡等问题。该模型在山洪沟水面线的分析计算领域具有良好的工程应用前景。The one-dimensional unsteady flow model established with Saint-Venant equations discretized by Godunov scheme with better shock capturing capability is applied to the calculation of the water level of mountain torrent ditch. At first,it is verified through the calculation made on the case of mixed flow that this model has a better capability for simulating the discontinuous water level and the transition of flow regime,and then the unsteady flow model is applied to the water level calculations made on Liujiasheke Mountain Torrent Ditch,Liangjiacha Mountain Torrent Ditch and Honghuaping Mountain Torrent Ditch. The relevant analysis shows that the calculation result is reasonable,while the torrential flow,flow regime transition,etc. under the conditions of drastic changes of steep slope and section are better simulated by the model. Therefore,this model has a better prospect of engineering application in the field of the analysis and calculation of the water level of mountain torrent ditch.

关 键 词：非恒定流模型 Godunov格式 山洪沟 水面线 

分 类 号：TV131.2[水利工程—水力学及河流动力学]