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Roots Compressor: High Temperature Testing and Modeling

[+] Author Affiliations
David I. Blekhman

Grand Valley State University

Joseph C. Mollendorf, James D. Felske, John A. Lordi, Ashish M. Joshi

State University of New York at Buffalo

Paper No. IMECE2004-59223, pp. 43-58; 16 pages
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Process Industries
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Process Industries Division
  • ISBN: 0-7918-4717-9 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME


The Roots compressor has enjoyed a multitude of applications. Retuned to produce a high-temperature stream of gas, the Roots compressor can be a part of such applications as pyrolitic synthesis, chemical decomposition, optical fiber production and experimental studies. Presently, it appears that by using advanced materials, a prototype capable of withstanding temperatures up to 1500–2000 K could be built. A series of experiments was performed and various performance data were recorded at 2280 and 3430 rpm. The maximum steady state temperature achieved and the corresponding pressure ratio were 660 K and 3.9. Numerical modeling revealed a good correlation for pressure ratios up to 3. While the outlet pressure signature was accurately reproduced, the magnitude of the actual pressure fluctuation was somewhat in error. A more detailed physical model of gas dynamic processes could improve the agreement. The calculations were based on measurements of the internal leakage, need for modeling of which is emphasized.

Copyright © 2004 by ASME



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