MECHANISM AND EXPERIMENT OF THE INTERNAL CONDENSATION OF WATER VAPOR IN

PNEUMATIC SYSTEM

LI Jun¹  YANG Qingjun¹  WANG Zuwen²

(1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001;
2. College of Electromechanics and Materials Engineering, Dalian Maritime University, Dalian 116026)

Abstract: The internal condensation is investigated by taking single driving system as an example, and the mechanism of internal condensation is unveiled as follows: When the ability of moving condensed vapor toward the blind end is greater than the ability of moving it out of the system, internal condensation occurs; Otherwise, it does not occur. By using mass density to represent the formmer ability and volume ratio to represent the latter one, a dividing curve is obtained on the plot of mass density versus volume ratio. The experiment of the internal condensation in a pneuamtic system is carried out, the results are verified by the experiment.

Key words: Pneuamtic system Internal condensation Mechanism Judging methods

CLC No: TH138

国家自然科学基金资助项目(59375183). Received 20060911, received in revised form 20070427