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http://dx.doi.org/10.3795/KSME-B.2004.28.12.1501

Effect of Vertical Clearance Between a Rotor and Stater of a Disk-Type Drag Pump on the Performance  

Kwon, Myoung-Keun (성균관대학교 대학원 기계설계학과)
Hwang, Young-Kyu (성균관대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.12, 2004 , pp. 1501-1510 More about this Journal
Abstract
The pumping characteristics of a single-stage disk-type drag pump (DTDP) are calculated for the variation of the vertical clearance between a rotor and stator by the three-dimensional direct simulation Monte Carlo (DSMC) method. The gas flow mainly belongs to the molecular transition flow region. Spiral channels of a DTDP are cut on the both the upper and lower sides of a rotating disk, but a stationary disk is planar. The interaction between molecules is described by the variable hard-sphere model. The no time counter method is used as a collision sampling technique. The vertical clearance has a significant effect on the pumping performance. Experiments are performed under the outlet pressure range of 0.4∼533 Pa. When the numerical results are compared with the experimental data, the numerical results agree well quantitatively
Keywords
Disk-Type Drag Pump; Direction Simulation Monte Carlo; Ultimate Pressure; Compression Ratio; Throughput;
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Times Cited By KSCI : 1  (Citation Analysis)
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