A Novel Numerical Approach for Generation and Propagation of Rotor-Stator Interaction Noise

Patel, Krishna Rajendra

doi:10.2514/6.2016-2821

Cited by 1 publication

(2 citation statements)

References 16 publications

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“…This is accomplished through a twopart calibration: the compressibility correction factor tuning described earlier and effective camber reduction. Based on work by Patel et al [12], the camber is reduced linearly from leading edge to trailing edge:…”

Section: Transonic Compressor Studiedmentioning

confidence: 99%

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Innovations in Body Force Modeling of Transonic Compressor Blade Rows

Hill

Defoe

2018

International Journal of Rotating Machinery

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Aeroengine fans and compressors increasingly operate subject to inlet distortion in the transonic flow regime. In this paper, innovations to low-order numerical modeling of fans and compressors via volumetric source terms (body forces) are presented. The approach builds upon past work to accommodate any axial fan/compressor geometry and ensures accurate work input and efficiency prediction across a range of flow coefficients. In particular, the efficiency drop-off near choke is captured. The model for a particular blade row is calibrated using data from single-passage bladed computations. Compared to full-wheel unsteady computations which include the fan/compressor blades, the source term model approach can reduce computational cost by at least two orders of magnitude through a combination of reducing grid resolution and, critically, eliminating the need for a time-resolved approach. The approach is applied to NASA stage 67. For uniform flow, at 90% corrected speed and peak-efficiency, the body force model is able to predict the total-to-total pressure rise coefficient of the stage to within 1.43% and the isentropic efficiency to within 0.03%. With a 120∘ sector of reduced inlet total pressure, distortion transfer through the machine is well-captured and the associated efficiency penalty predicted with less than 2.7% error.

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Section: Transonic Compressor Studiedmentioning

confidence: 99%

“…Thus there is a constraint on the model constants such that the total value of at peak-efficiency must be conserved. Previously used values for 1 (0.0336) and 2 (0.6321) in the work by Patel [12] served as initial guesses.…”

Section: Calibration Of the Body Force Model A High-levelmentioning

confidence: 99%

Innovations in Body Force Modeling of Transonic Compressor Blade Rows

Hill

Defoe

2018

International Journal of Rotating Machinery

View full text Add to dashboard Cite

show abstract

A Novel Numerical Approach for Generation and Propagation of Rotor-Stator Interaction Noise

Cited by 1 publication

References 16 publications

Innovations in Body Force Modeling of Transonic Compressor Blade Rows

Innovations in Body Force Modeling of Transonic Compressor Blade Rows

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