Experimental Study on Frictional Flow Resistance in Water Wall Tubes of A 600 MW Supercritical Once-Through Boiler
Experimental Study on Frictional Flow Resistance in Water Wall Tubes of A 600 MW Supercritical Once-Through Boiler
复制标题
DOI：
--
复制
发表时间：
2005
影响因子：
--
通讯作者：
Z. Yu-qin;Chen Ting-kuan
中科院分区：
文献类型：
--
作者：
Z. Yu-qin;Chen Ting-kuan
对国产600 MW超临界直流锅炉水冷壁管的摩擦阻力特性进行了试验研究，试验管截面为φ =25×3 mm，材质为1Cr 18 Ni 9 Ti不锈钢，试验参数范围为：压力p=23-25 MPa，质量流量G=400-1200 kg/（m2·s），工质比焓h=600-2600 kJ/kg，雷诺数Re=1.2×10~4-1.0×10~ 6。研究了超临界压力条件下水冷壁管壁摩擦系数随介质温度的变化规律。试验结果表明，在相变点附近，水冷壁管壁摩擦系数出现阶跃，随压力的升高而减小。根据试验数据，得到了超临界压力条件下水冷壁管壁摩擦系数的经验计算公式。与实验测量值相比，误差小于10%。
Characteristics of frictional flow resistance of water wall tubes of a domestic manufactured 600 MW supercritical once-through boiler have been studied.Tests were performed with a =25×3 mm tube section,made of stainless steel 1Cr18Ni9Ti,in the following parameter ranges: pressure p=23-25 MPa,mass flow G=400-1200 kg/(m~2·s),specific enthalpy of working medium h=600-2600 kj/kg and Reynolds number Re=1.2×10~4-1.0×10~6.Influences of the above parameters(including the medium's temperature) on the friction coefficient were investigated.Test results show that the friction coefficient incurres a step jump on passing the phase change point,abating with rising pressure.Based on the test data,an empirical formulas is obtained for calculating friction coefficients of water wall tubes,under supercritical pressure conditions,with a possible error below 10% compared with experimental measurements.Figs 7 and refs 4.