亚临界与近临界压力下垂直上升管内气-液两相流体摩擦阻力特性试验研究

An experimental investigation of frictional pressure drop of gas-liquid two-phase in upward tube under sub-critical and near critical pressure regions

以超临界600mW直流锅炉水冷壁管内气-液两相流体为研究对象,试验段尺寸为25×4 000mm,材质为1Cr18Ni9Ti.在压力为11~21MPa,质量流速为600~1 200kg·m^-2s^-1,干度为0~1的工况范围内,研究了工质压力、质量流速及质量含气率等参数对单相及气-液两相流体摩擦阻力的影响.在本文所获得的试验数据与理论分析的基础上,拟合出可用于工程实际中计算水冷壁管内气-液两相流体摩擦阻力的关系式.

The gas-liquid two-phase fluids in water-wall tube of 600 mW supercritical pressure boiler are utilized as test fluid.The test section size and material are25×4 000 mm and1Cr18Ni9 Ti.The frictional influences of single phase and gas-liquid two-phase are investigated by fluid pressure,mass flow rate and mass quality in the experimental ranges：pressure 11to21 MPa,mass flow 600 to 1 200kg·m^-2s^-1 and dryness 0to 1.A formula for calculating the frictional pressure drop coefficient of gas-liquid two-phase flow in water tube was derived on the basis of a great deal of data obtained from the experiment and related theory analysis.