Experimental Evaluation of Heavy Fan-High-Pressure Compressor Interaction in a Three-Shaft Engine: Part 1—Experimental Setup and Results

[+] Author and Article Information
A. Schäffler

MTU, Munich, Germany

D. C. Miatt

RR, Bristol, England

J. Eng. Gas Turbines Power 107(4), 828-832 (Oct 01, 1985) (5 pages) doi:10.1115/1.3239818 History: Received January 10, 1985; Online October 15, 2009


Severe aerodynamic interaction between the fan core stream section and the high-pressure compressor of a three-shaft low-bypass-ratio engine is described. At high fan running lines a heavy single-cell rotating stall was found in the fan core stream even at high aerodynamic speeds between 90–98% . The rotating circumferential distortion with 180–200 deg sector angle is swallowed by the intermediate pressure compressor but erodes the high-pressure compressor surge margin by about 22% , leading to steady-state surges. A remotely mounted transducer in a specific arrangement was used successfully for measurements in the hot environment behind intermediate and high-pressure compressor using a so-called “long-line” system with a closed end at the downstream pipe.

Copyright © 1985 by ASME
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