Computational Analysis of the Transonic Flow Field of Two-Dimensional Minimum Length Nozzles

[+] Author and Article Information
B. M. Argrow, G. Emanuel

School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019

J. Fluids Eng 113(3), 479-488 (Sep 01, 1991) (10 pages) doi:10.1115/1.2909521 History: Received July 31, 1990; Online May 23, 2008


The method of characteristics is used to generate supersonic wall contours for two-dimensional, straight sonic line (SSL) and curved sonic line (CSL) minimum length nozzles for exit Mach numbers of two, four and six. These contours are combined with subsonic inlets to determine the influence of the inlet geometry on the sonic-line shape, its location, and on the supersonic flow field. A modified version of the VNAP2 code is used to compute the inviscid and laminar flow fields for Reynolds numbers of 1,170, 11,700, and 23,400. Supersonic flow field phenomena, including boundary-layer separation and oblique shock waves, are observed to be a result of the inlet geometry. The sonic-line assumptions made for the SSL prove to be superior to those of the CSL.

Copyright © 1991 by The American Society of Mechanical Engineers
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