Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Jeff Defoe"'
1
The Effect of Blade Count on Body Force Model Performance for Axial Fans
Autor: Jeff Defoe, Palak Saini
Publikováno v: Journal of Turbomachinery. 143
Body force models enable inexpensive numerical simulations of turbomachinery. The approach replaces the blades with sources of momentum/energy. Such models capture a “smeared out” version of the blades’ effect on the flow, reducing computationa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77f7d9102fafaee9686fdf8106049457
https://doi.org/10.1115/1.4050388
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3
Scaling of Incidence Variations With Inlet Distortion for a Transonic Axial Compressor
Autor: Jeff Defoe, D. J. Hill
Publikováno v: Journal of Turbomachinery. 142
This paper numerically explores the manner in which blade row inlet incidence variation scales with various distortion patterns and intensities. The objectives are to (1) identify the most appropriate parameter whose circumferential variation can be
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5358f0bd62dc42cfa01891a5eeac508
https://doi.org/10.1115/1.4045464
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4
Prediction of Crosswind Separation Velocity for Fan and Nacelle Systems Using Body Force Models: Part 2: Comparison of Crosswind Separation Velocity with and without Detailed Fan Stage Geometry
Autor: Jeff Defoe, Quentin J. Minaker
Publikováno v: International Journal of Turbomachinery, Propulsion and Power
Volume 4
Issue 4
Modern aircraft engines must accommodate inflow distortions entering the engines as a consequence of modifying the size, shape, and placement of the engines and/or nacelle to increase propulsive efficiency and reduce aircraft weight and drag. It is i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3773617f680a2a81d277c22fe5f4ab9e
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5
Prediction of Crosswind Separation Velocity for Fan and Nacelle Systems Using Body Force Models: Part 1: Fan Body Force Model Generation without Detailed Stage Geometry
Autor: Jeff Defoe, Quentin J. Minaker
Publikováno v: International Journal of Turbomachinery, Propulsion and Power
Volume 4
Issue 4
Modern aircraft engines must accommodate inflow distortions entering the engines as a consequence of modifying the size, shape, and placement of the engines and/or nacelle to increase propulsive efficiency and reduce aircraft weight and drag. It is i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba3f6dc8edc5dd0a77455531e1514ea9
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6
A No-Calibration Approach to Modelling Compressor Blade Rows With Body Forces Employing Artificial Neural Networks
Autor: S. Pazireh, Jeff Defoe
Publikováno v: Volume 2A: Turbomachinery.
Body force modelling in numerical simulations of axial compressors and fans has been used extensively in the literature to assess aerodynamic performance in uniform and non-uniform flow at relatively low computational cost. Existing approaches requir
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9397d687057ccdc32691eab093414b74
https://doi.org/10.1115/gt2019-90553
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7
A New Loss Generation Body Force Model for Fan/Compressor Blade Rows: An Artificial-Neural-Network Based Methodology
Autor: Jeff Defoe, Syamak Pazireh
Publikováno v: International Journal of Turbomachinery, Propulsion and Power
Volume 6
Issue 1
International Journal of Turbomachinery, Propulsion and Power, Vol 6, Iss 5, p 5 (2021)
Body force models of fans and compressors are widely employed for predicting performance due to the reduction in computational cost associated with their use, particularly in nonuniform inflows. Such models are generally divided into a portion respon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa6ee3c8e6fcfae5437c9c1f3711d810
https://doi.org/10.3390/ijtpp6010005
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8
Fan Performance Scaling With Inlet Distortions
Autor: David K. Hall, Jeff Defoe, Majed Etemadi
Publikováno v: Journal of Turbomachinery. 140
Applications 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) ident
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9413ff2b8c9f39662e595d7f6908b79
https://doi.org/10.1115/1.4039433
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10
A Combined Numerical and Experimental Assessment of Air and Dust Flow in a Low-Reynolds Number Valve Including Modifications to Prevent Valve Seal Contamination
Autor: R. S. Gill, G. W. Rankin, Jeff Defoe
Publikováno v: Volume 1B, Symposia: Fluid Mechanics (Fundamental Issues and Perspectives; Industrial and Environmental Applications); Multiphase Flow and Systems (Multiscale Methods; Noninvasive Measurements; Numerical Methods; Heat Transfer; Performance); Transport Phenomena (Clean Energy; Mixing; Manufacturing and Materials Processing); Turbulent Flows — Issues and Perspectives; Algorithms and Applications for High Performance CFD Computation; Fluid Power; Fluid Dynamics of Wind Energy; Marine Hydrodynamics.
High concentrations of particulate matter in air lead to deposition at the sealing radius of self-sealing valves involving direct intake from the environment. Dust deposition at and near this radius causes an increase in leakage flow when the valve i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ed4aacdb61b6231d88d05a4489f5f42
https://doi.org/10.1115/fedsm2016-7669
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