Flow Fields in a Two-Dimensional Diffuser With Extraction of Fluid on the Diverging Walls

[+] Author and Article Information
D. O. Rockwell

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pa.

J. Eng. Power 94(3), 226-232 (Jul 01, 1972) (7 pages) doi:10.1115/1.3445677 History: Received October 14, 1971; Online July 14, 2010


A theory is developed to describe the inviscid core in two-dimensional unstalled diffusers with suction (extraction) on the diverging walls. Experimental wall static pressure distributions and streamline patterns agree well with those predicted theoretically. Under appropriate extraction conditions, a stagnation region is located downstream of the diverging wall extraction station. Experimental verification of the streamline patterns and of the location of this stagnation region was achieved via hydrogen bubble visualization. In addition, the possible stall conditions, which result if improper extraction is employed, are described qualitatively.

Copyright © 1972 by ASME
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