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.
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An Accurate Expression for Gas-Pressure Drop in High-Speed Subsonic Flow With Friction and Heating
R. H. Fox
Nuclear Propulsion Division, Lawrence Radiation Laboratory, University of California, Livermore, Calif.
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Fox, R. H. (December 1, 1960). "An Accurate Expression for Gas-Pressure Drop in High-Speed Subsonic Flow With Friction and Heating." ASME. J. Appl. Mech. December 1960; 27(4): 747–748. https://doi.org/10.1115/1.3644097
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