流动显示技术及其在温排放模型试验中的应用  

The Application of Flow Visualization Techniques to Cooling Water Model

作　　者：朱晟[1,2] 倪军[1,2] 任佐皋 

机构地区：[1]河海大学水利水电工程学院 [2]河海大学设计院 [3]河海大学港口航道及海岸工程学院

出　　处：《河海大学学报（自然科学版）》1998年第3期50-55,共6页Journal of Hohai University(Natural Sciences)

基　　金：中国电力联合会基金

摘　　要：简介了作者的流动显示方法（包括应用塑料示踪剂、间隙曝光装置、定时控制器和普通照相机来拍摄水工整体试验中大范围流动的照片（流谱图））；并利用微机图形处理系统，对实拍流谱图进行图／数处理（包括光学修正、网格插补等预处理和信息处理），从中识别出流体物理参数及其等值线分布图（包括流速场、流函数场和涡度场等）．作为实例，介绍了应用本流动显示技术和方法，在某电厂温排水整体试验中获得取排水口近区流场定量信息的情况，为评价和优化工程措施提供了科学依据．A flow visualization method to research hydrodynamic parameters within a large range of test field is proposed.Flow visualization facilities consist of particular plastic tracers,an intermittent exposure unit and a camera system.A numerical method proposed in this article for processing the flow pattern quantiatively includes two parts:(a) The preprocessing of the measured flow pattern,in which some necessary correction rules are presented to improve the reality of the flow pattern ;(b)The calculation of the velocity,flow function,and vortex in the flow field.All processing of the flow pattern is performed automatically by a microcomputer system.As an example,two typical flow patterns of the cooling water discharged into the river from a thermal power plant are analyzed.

关 键 词：流动显示 流谱 流场 温排水 模型试验 

分 类 号：TV131.6[水利工程—水力学及河流动力学]