3D free surface measurement and numerical modelling of flows in storm overflows

作     者：Kouyi, GL Vazquez, J Poulet, JB 

作者机构：Natl Water & Environm Engn Sch Strasbourg ENGEES Lab SHU F-67067 Strasbourg France Higher Natl Art & Ind Sch Strasbourg ENSAIS Strasbourg France 

出 版 物：《FLOW MEASUREMENT AND INSTRUMENTATION》 (流量测量与仪表设备)

年 卷 期：2003年第14卷第3期

页      面：79-87页

核心收录：

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 0804[工学-仪器科学与技术] 0802[工学-机械工程] 

基　　金：GEMCEA National Fund for Water Supply Development 

主　　题：storm overflow free surface measurement structured light projection 3D numerical modelling 

摘      要：This article addresses the experimental measurement and validation of 3D numerical modelling of the free surface of a storm overflow of a sanitation system. The authors have prepared a model to develop the measurement instrument. The 3D free surface measurement was achieved by means of the structured light projection technique. In practice, the interpretation of the deformation of a fringe pattern projected on the surface of the moving water provided the height of the water. The calculation chiefly relied on extracting the phase phi(x, y) of the image by performing a Fourier transform of the input signal I(x, y). The work involved the use of reference planes and correcting the deformation of the images generated by the camera. In order to test the suitability of a 3D hydrodynamic computational code for modelling overflows, the experimental results obtained with the model were used as the reference for a comparison with the modelled free surface. The differences in height observed were less than 5 mm. The system has therefore been found to provide reliable data and to validate the use of 3D computational codes. (C) 2003 Elsevier Science Ltd. All rights reserved.