【摘要】 由于两相流的复杂性,目前对于气泡雾化的机理一直都没有充分的定论,也没有得到一个统一的粒径计算公式,本文通过对气泡雾化过程中气液两相流的分析,推导环状流气泡雾化的粒径计算公式。通过实验测量GLR(气液质量比)范围为5%~20%时的粒径,并通过喷孔直径为1.5 mm的数据标定得到推导的粒径计算公式中的压差因子C和n,并将计算结果与喷孔直径1.2~1.8 mm的实验结果比较得出,计算公式具有很高的精度,验证了对于环状流气泡雾化的分析。更多还原

【Abstract】 The mechanism of atomization has not been fully understood due to the complexity of the two-phase flow and there is no generic formula for calculating the diameter of droplets. This paper analyzed the two-phase flow patterns and deduced a calculation formula for the droplet diameter of effervescent atomization. Through measuring the droplet diameter under the condition of gas/liquid ratio( GLR) 5%-20% and nozzle diameter 1.5mm,the pressure difference factors C and n for the droplet diameter calculation formula were determined. Then the calculated droplet diameter(SMD) was compared to the measured droplet diameter for the nozzle diameters of 1.2 mm-1.8 mm,and it showed good agreement,confirming the analysis rationality.更多还原