Experimental and Analytical Sonic Nozzle Discharge Coefficients for Reynolds Numbers up to 8×106

[+] Author and Article Information
A. J. Szaniszlo

Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio

J. Eng. Power 97(4), 521-525 (Oct 01, 1975) (5 pages) doi:10.1115/1.3446050 History: Received July 29, 1974; Online July 14, 2010


Sonic discharge coefficients are presented for two different geometry flow nozzles using nitrogen gas at high pressures (100 atm (100 × 105 N/m2 )) where real-gas corrections are significant. Throat Reynolds number range extended up to 8 × 106 . Experimentally obtained coefficients for a nozzle with a continuous and finite radius of curvature agreed with those obtained analytically to within 0.2 percent. Experimental coefficients for a long-radius ASME nozzle agreed to within 1/4 percent to an empirical equation representing the most probable subsonic discharge coefficient.

Copyright © 1975 by ASME
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