超超临界锅炉水冷壁节流圈结构对结垢的影响  

Effects of Throttle Orifice's Structural Parameter on its Scaling Problem in the Water Wall of an Ultra-Supercritical Boiler

作　　者：汤妍[1] 周克毅[1] 韦红旗[1] 徐啸虎[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《江苏电机工程》2011年第1期5-8,13,共5页Jiangsu Electrical Engineering

摘　　要：基于FLUENT平台,建立超超临界锅炉水冷壁节流圈的三维数学模型并进行数值求解,利用水动力标准计算方法验证数值解法的正确性。分析了节流圈的结垢机理,并进一步分析了节流圈入口倒角、出口倒角、孔径和长度等结构参数对结垢的影响,最后指出减少结垢的方法,并对节流圈的结构设计提出建议。In this paper,a simulation model for the throttle orifice installed in the water wall of an Ultra-Supercritical Boiler is established based on the FLUENT numerical platform,and the verification has also been carried out just using the results obtained from the standard hydrodynamic calculating method.The scaling mechanism of the throttle orifice is analyzed,and effects of the throttle orifice＇s structural parameter on its scaling problem are studied by selecting different entrance chamfering,export chamfering,diameter and length.Finally,a method to reduce scaling is provided and a suggestion for the design of the throttle orifice is also made.

关 键 词：超超临界 节流圈 结垢 数值模拟 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]