变压运行直流锅炉水冷壁中间集箱汽液分配特性的试验研究  

Experimental Study on Steam-liquid Distribution Characteristics of Intermediate Headers of the Once-through Boiler with Variable Pressure Operation

作　　者：朱玉琴[1] 毕勤成[2] 陈听宽[2] 李迓红[1] 

机构地区：[1]西安石油大学石油炼化工程技术研究中心,西安710065 [2]西安交通大学动力工程多相流国家重点试验室,西安710049

出　　处：《动力工程》2008年第6期834-838,共5页Power Engineering

基　　金：国家自然科学基金资助项目(No.50323001)

摘　　要：利用空气-水试验回路，模拟了超临界变压运行直流锅炉在35％、50％和75％额定负荷（ECR）下汽-液两相流在中间集箱中的分配特性．采用快关阀门法和摩擦阻力法分别测量了各支管内的体积含气率和流量分布．试验结果表明：在入口干度x=0．7～0．95的范围内，35％ECR下并联支管的含气率分布最均匀，随着负荷的增加，各支管间的相分配偏差增加；锅炉负荷增加时，并联支管内流量分配的均匀性增加．The distribution characteristics of steam-liquid two phase flow in the intermediate headers of the supercritical one-through boiler were simulated under the condition of 35%, 50% and 75% ECR with variable pressure operation based on an air-water test circuit. The volumetric fractions of air content and flow rate in each branch were measured by use of the quick-close valve method and frictional resistance method respectively. Test results show that the air fraction distribution in the parallel branch is the most uniform under 35% ECR when the inlet dryness x is in the range of 0.7-0.95. With the increase of load, the deviation of phase distribution among branches increases, and the uniformity of flow distribution also increases.

关 键 词：能源与动力工程 分配特性 空气-水两相流 超临界锅炉 中间集箱 

分 类 号：TK223.31[动力工程及工程热物理—动力机械及工程]