An Accurate Expression for Gas-Pressure Drop in High-Speed Subsonic Flow With Friction and Heating

[+] Author and Article Information
R. H. Fox

Nuclear Propulsion Division, Lawrence Radiation Laboratory, University of California, Livermore, Calif.

J. Appl. Mech 27(4), 747-748 (Dec 01, 1960) (2 pages) doi:10.1115/1.3644097 History: Received March 29, 1960; Online September 16, 2011


An approximate solution is derived for the pressure ratio in high-speed subsonic flow through constant-cross-section circular tubes with friction and heating. The results are compared with those obtained from an accurate numerical calculation. The gas used is air. A wide range of variables such as temperature ratio, exit Mach number (up to 0.90), tube length-to-diameter ratio, and shape of the power distribution function is examined. The derived expression is found to be quite accurate in all cases.

Copyright © 1960 by ASME
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