On Transition From Supersonic to Subsonic Flow at Low Reynolds Numbers in a Tube

[+] Author and Article Information
R. Y. Chen

Department of Mechanical Engineering, Newark College of Engineering, Newark, N. J.

J. C. Williams

Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, N. C.

J. Appl. Mech 36(2), 146-150 (Jun 01, 1969) (5 pages) doi:10.1115/1.3564601 History: Received April 10, 1967; Revised December 26, 1968; Online September 14, 2011


A supersonic low-density gas stream produced in a supersonic nozzle was passed through a circular tube in which the transition from supersonic to subsonic flow took place. Static pressure distributions along the tube (and nozzle) and impact pressure distributions across the tube at several stations were measured to determine the nature of this transition. The impact pressure distributions were used, together with the local static pressure, to infer Mach number and velocity profiles in the tube. When the pressure distributions and center-line Mach number distributions are considered together, one obtains a fairly clear picture of the processes involved in the transition from supersonic to subsonic flow at low Reynolds numbers.

Copyright © 1969 by ASME
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