Dynamic loading of an inlet guide vane (IGV) in a transonic compressor is characterized by unsteady IGV surface pressures. These pressure data were acquired for two spanwise locations at a 105 percent speed operating condition, which produces supersonic relative Mach numbers over the majority of the rotor blade span. The back pressure of the compressor was varied to determine the effects from such changes. Strong bow shock interaction was evident in both experimental and computational results. Variations in the back pressure have significant influence on the magnitude and phase of the upstream pressure fluctuations. The largest unsteady surface pressure magnitude, 40 kPa, was obtained for the near-stall mass flow condition at 75 percent span and 95 percent chord. Radial variation effects caused by the spanwise variation in relative Mach number were measured. Comparisons to a two-dimensional nonlinear unsteady blade/vane Navier–Stokes analysis show good agreement for the 50 percent span results in terms of IGV unsteady surface pressure. The results of the study indicate that significant nonlinear bow shock influences exist on the IGV trailing edge due to the downstream rotor shock system. [S0889-504X(00)00303-2]
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July 2000
Technical Papers
Variations in Upstream Vane Loading With Changes in Back Pressure in a Transonic Compressor
Douglas P. Probasco,
Douglas P. Probasco
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
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Tim J. Leger,
Tim J. Leger
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
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J. Mitch Wolff,
J. Mitch Wolff
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
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William W. Copenhaver,
William W. Copenhaver
Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 44135
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Randall M. Chriss
Randall M. Chriss
NASA Glenn Research Center, Cleveland, OH 43210
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Douglas P. Probasco
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
Tim J. Leger
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
J. Mitch Wolff
Department of Mechanical & Materials Engineering, Wright State University, Dayton, OH 45435
William W. Copenhaver
Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 44135
Randall M. Chriss
NASA Glenn Research Center, Cleveland, OH 43210
Contributed by the International Gas Turbine Institute and presented at the 43rd International Gas Turbine and Aeroengine Congress and Exhibition, Stockholm, Sweden, June 2–5, 1998. Manuscript received by the International Gas Turbine Institute February 1998. Paper No. 98-GT-344. Associate Technical Editor: R. E. Kielb.
J. Turbomach. Jul 2000, 122(3): 433-441 (9 pages)
Published Online: February 1, 1998
Article history
Received:
February 1, 1998
Citation
Probasco , D. P., Leger , T. J., Wolff, J. M., Copenhaver, W. W., and Chriss, R. M. (February 1, 1998). "Variations in Upstream Vane Loading With Changes in Back Pressure in a Transonic Compressor ." ASME. J. Turbomach. July 2000; 122(3): 433–441. https://doi.org/10.1115/1.1303074
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