Abstract:
In order to reveal oil flow and the diffusing behavior of compressed air in oil, the flow of the mixture of lubricant oil and the compressed air is investigated by experiment and theoretical analysis. By experiments, the flow regime of lubricant oil is correlated closely with the Reynold′s number of compressed air. By means of the analysis of color difference, it shows that the volume fraction of gas dispersed in lubricant oil is 4%-6%. The results of numerical solution show that lubricant oil rolls within pipe like a wave, which will give rise to many bubbles between lubricant oil and the wall of the pipe. The pressure inside the bubbles is higher than that of ambient pressure. This is the reason for the compressed air diffusing into lubricant oil. And the volume fraction of air in lubricant oil is about 6.12%, which is reasonable and agrees with the results of experiment.