四角切圆炉内空气动力特性的声学测量试验  

Testing the aerodynamic characteristics in a tangential boiler by acoustic measurement

作　　者：张引弟[1] 陈世英[2] 李言钦[3] 周怀春[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [2]湖北省电力试验研究院,湖北武汉430077 [3]郑州大学化工与能源学院,河南郑州450001

出　　处：《华中科技大学学报（自然科学版）》2009年第12期83-86,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50721005);"111"引智计划资助项目(B06019)

摘　　要：为了实现炉内流场、温度场的实时在线监测,针对某电场300MW四角切圆锅炉进行了冷态模化并搭建了试验台架.通过不同的方法来研究炉内流场,从而说明声学法测流场的基本可行有效性,为电站在线冷态检测以及热态试验做准备.分别用热球风速仪和声学法对炉膛断面的流场进行了测量,同时用CFD做了模拟计算,就切圆在该断面的形状、圆心位置和大小的变化及影响因素进行了研究,并就典型工况进行了对比分析.结果表明:该冷模研究结果可行、有效;不同配风方式对炉内切圆的影响较大,根据此影响可有针对性地对现场锅炉进行调试、改造和优化,同时也可指导锅炉设计.A test bench was built and a 300 MW boiler was modeled to monitor the velocity and temperature fields in the furnace. The cold velocity field was measured by hot wire anemometer and acoustic measurement in the upper furnace, and the cold model was simulated by computational fluid dynamics （CFD） to show the effectiveness of study, to ready for measuring cold on-line measurement and for measuring temperature field. The changes and influencing factors of the tangential circle shape, circle center position and size were studied in the furnace section. A comparative analysis was done for typical working. The results show that this study is efficient and effective, and different air distribution mode influences the tangential circle in the furnace largely. These characteristics can help debugging, transformation and optimization for utility boiler and guide boiler designs.

关 键 词：四角锅炉 空气动力场 声学测量 冷模试验 数值计算 切圆直径 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]