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Fan Performance Scaling With Inlet Distortions
Volume 2A: Turbomachinery, 2016Applications such as boundary-layer-ingesting fans, and compressors in turboprop engines require continuous operation with distorted inflow. A low-speed axial fan with incompressible flow is studied in this paper. Previous work in the literature has shown that the same flow mechanisms contributing to the response of a fan to distortion are at play in ...
J. J. Defoe, D. K. Hall
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The Effect of Lipskin Damage on Inlet Distortion
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010Damage to the lipskin of an engine nacelle can have a significant impact on engine performance and safety, especially in combination with other sources of inlet flow distortion. While the degradation of performance in aircraft propulsion systems as a result of inlet distortion has been well-studied, the impact of lipskin damage upon inlet distortion ...
Kennedy, Stefan +3 more
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The Cascade Subjected to Inlet Distortions
Aeronautical Quarterly, 1968SummaryThis paper presents a method for evaluating the effects of shear flow on the performance of a two-dimensional cascade in an incompressible fluid. The method of distributing the singularities along the chord is modified to meet the requirement that the sum of the distorted and perturbed velocities should produce a flow around the aerofoil ...
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Numerical and Test Investigation on an Aircraft Inlet Distortion
International Journal of Turbo and Jet Engines, 2013Anping Hou
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Interpolation Methods for Inlet Distortion Determination
54th AIAA Aerospace Sciences Meeting, 2016Inlet flow distortion is a major factor in inlet design; distortion indicates the amount of fluctuation in a flow and translates directly into the breadth of the engine’s operating envelope. ARP1420 is the standard governing inlet distortion testing which gives guidance on how to collect total pressure data at the engine face but is silent on how that ...
Sibylle F. Walter, Ryan P. Starkey
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Inlet airflow distortion in turbomachinery
Zeitschrift für angewandte Mathematik und Physik ZAMP, 1972The attenuation of an inlet flow distortion in a single stage mixed flow compressor is calculated. Use is made of a modified actuator disc theory. The case where the axial gaps are very small is considered in particular.
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Circumferential Inlet Distortions in Axial Flow Turbomachinery
Journal of the Aeronautical Sciences, 1957An actuator disc type of analysis is carried out to determine the effect of a nonuniformity in the circumferential velocity profile entering an axial flow stage of turbomachinery. The analysis is restricted to study of incompressible, inviscid flow with the assumption of hub/ t ip ratios close to unity reducing the problem to two dimensions ...
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Fan Performance Scaling With Inlet Distortions
Journal of Turbomachinery, 2018Applications such as boundary-layer-ingesting (BLI) fans and compressors in turboprop engines require continuous operation with distorted inflow. A low-speed axial fan with incompressible flow is studied in this paper. The objectives are to (1) identify the physical mechanisms which govern the fan response to inflow distortions and (2) determine how ...
J. J. Defoe, M. Etemadi, D. K. Hall
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Effects of Rotating Inlet Distortion on Multisage Compressor Stability
Volume 1: Turbomachinery, 1994In multi-spool engines, rotating stall in an upstream compressor will impose a rotating distortion on the downstream compressor, thereby affecting its stability margin. In this paper experiments are described in which this effect was simulated by a rotating screen upstream of several multistage low-speed compressors.
J. P. Longley +7 more
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Dynamic inlet distortion predictions using a CFD/distortion synthesis approach
16th AIAA Applied Aerodynamics Conference, 1998A procedure is presented to predict dynamic inlet distortion using a combined CFD and distortion synthesis method. A prediction of the steady state total pressure pattern at the Aerodynamic Interface Plane (AIP) is first obtained using a CFD Navier-Stokes program incorporating a two-equation turbulence model. A corresponding inlet turbulence pattern is
John Ladd, William Norby
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