连续变截面直立管气泡泵工作特性试验研究

搭建了变截面直立管气泡泵装置试验台,采用无量纲方法定义气泡泵效率,分析加热功率,沉浸比对变截面直立管气泡泵提升性能的影响,并与等量管径(d=10mm)直管形气泡进行对比分析。试验结果表明在相同沉浸比下,随着加热功率增加液体提升率先增到最大值后逐渐减小;同样气泡泵效率也呈现出类似的变化趋势,不同趋势在于气泡泵效率存在峰值,且峰值随沉浸比的减小逐渐向右移动,最大率值从0.49降低到0.16;而与等量管径直管气泡泵对比中,在沉浸比0.5加热功率P=350W时,变截面直立管气泡泵提升优势明显,效率高出等量管径直管气泡泵效率9.2%。本文研究成果为变截面提升管气泡泵的优化设计提供了试验依据,拓宽了气泡泵的研究范围。

Experimental Study of Working Characteristic on Continuous Variable Cross-sectional Upright Tube Bubble Pump

A variable cross-sectional tubular bubble pump experiment apparatus was systematically built to analyze the influence of heating power and immersed ratio on the lifting performance of variable cross-sectional tubular bubble pump.The dimensionless method was used to innovatively define the bubble pump efficiency.The mass lifting performance was analytically compared between cross-sectional tubular bubble pump and straight tube-shaped(d = 10mm) bubble pump.The experimental results revealed that the mass-lifted rate of the liquid was first increased to a maximum and then slow down gradually with increase of heating power at the same immersed ratio.Similarly,the bubble pump efficiency also took on a analogical trend; the difference was that the bubble pump efficiency had a peak which gradually decreased and moved right with immersion ration and the maximum efficiency correspondingly reduced from 0.49 to 0.16 in the efficiency graph.When the immersion ratio is 0.5 and the heating power is350W,the mass-lifted efficiency of cross-sectional tubular bubble pump increased by 9.2% than the mass-lifted efficiency of straight tube-shaped(d = 10mm) bubble pump in the experiment.The results not only provided an optimal experimental basis for the design of variable cross-section tube bubble pump,but also broaden the research scope of the bubble pump.