Pressure Loss Through Sharp 180 Deg Turns in Smooth Rectangular Channels

[+] Author and Article Information
D. E. Metzger, C. W. Plevich, C. S. Fan

Mechanical and Aerospace Engineering Department, Arizona State University, Tempe, Ariz. 85287

J. Eng. Gas Turbines Power 106(3), 677-681 (Jul 01, 1984) (5 pages) doi:10.1115/1.3239623 History: Received January 11, 1984; Online October 15, 2009


Measured pressure distributions, pressure loss coefficients, and surface streamline visualizations are presented for 180 deg turns in smooth, rectangular cross-section channels. The flow geometry models situations that exist in multipass internal cooling of gas turbine engine airfoils. The turn geometry is characterized by parameters W* , the ratio of upstream and downstream channel widths; D* , the nondimensional channel depth; H* , the nondimensional clearance height at the tip of the turn; and R* , the nondimensional corner fillet radius. The present results cover a range of combinations of geometry parameters and Reynolds numbers to aid in prediction of coolant flow rates in present and future cooled airfoil designs.

Copyright © 1984 by ASME
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