Part I of this paper validated the ability of the unsteady Reynolds-Averaged Navier-Stokes (RANS) solver PTURBO to accurately simulate distortion transfer and generation through selected blade rows of two multistage fans. In this part, unsteady RANS calculations were successfully applied to predict the 1/rev inlet total pressure distortion transfer in the entirety of two differently designed multistage fans. This paper demonstrates that high-fidelity computational fluid dynamics (CFD) can be used early in the design process for verification purposes before hardware is built and can be used to reduce the number of distortion tests, hence reducing engine development cost. The unsteady RANS code PTURBO demonstrated remarkable agreement with the data, accurately capturing both the magnitude and the profile of total pressure and total temperature measurements. Detailed analysis of the flow physics identified from the CFD results has led to a thorough understanding of the total temperature distortion generation and transfer mechanism, especially for the spatial phase difference of total pressure and total temperature profiles. The analysis illustrates that the static parameters are more revealing than their stagnation counterpart and that pressure and temperature rise are more revealing while the pressure and temperature ratio could be misleading. The last stage is effectively throttled by the inlet distortion even though the overall engine throttle remains unchanged. The total temperature distortion generally grows as flow passes through the fan stages.
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October 2010
Research Papers
High-Fidelity Numerical Analysis of Per-Rev-Type Inlet Distortion Transfer in Multistage Fans—Part II: Entire Component Simulation and Investigation
Jixian Yao,
Jixian Yao
GE Global Research
, One Research Circle, Niskayuna, NY 12309
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Steven E. Gorrell,
Steven E. Gorrell
Department of Mechanical Engineering,
Brigham Young University
, 435 CTB, Provo, UT 84602
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Aspi R. Wadia
Aspi R. Wadia
GE Aviation
, 30 Merchant Street, P20, Cincinnati, OH 45215
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Jixian Yao
GE Global Research
, One Research Circle, Niskayuna, NY 12309
Steven E. Gorrell
Department of Mechanical Engineering,
Brigham Young University
, 435 CTB, Provo, UT 84602
Aspi R. Wadia
GE Aviation
, 30 Merchant Street, P20, Cincinnati, OH 45215J. Turbomach. Oct 2010, 132(4): 041015 (17 pages)
Published Online: May 6, 2010
Article history
Received:
September 9, 2008
Revised:
January 28, 2009
Online:
May 6, 2010
Published:
May 6, 2010
Connected Content
A companion article has been published:
High-Fidelity Numerical Analysis of Per-Rev-Type Inlet Distortion Transfer in Multistage Fans—Part I: Simulations With Selected Blade Rows
Citation
Yao, J., Gorrell, S. E., and Wadia, A. R. (May 6, 2010). "High-Fidelity Numerical Analysis of Per-Rev-Type Inlet Distortion Transfer in Multistage Fans—Part II: Entire Component Simulation and Investigation." ASME. J. Turbomach. October 2010; 132(4): 041015. https://doi.org/10.1115/1.3148479
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