Results 1 to 10 of about 93,522 (307)
Axial compressor blades tip leakage flow control using natural aspiration. [PDF]
Sci Rep, 2023 AbstractBlades tip leakage flow structure in axial compressors has dominant effects on flow stability and losses. Accordingly, in the present study, three different ideas are introduced for alleviation of undesirable effects of the blades tip leakage flow. These ideas utilize circumferential tape, S-shape nozzle and natural aspiration slot, all imposed
Nejad PG, Zenouz RT.
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Wavelet Analysis of a Blade Tip-Leakage Flow [PDF]
AIAA Journal, 2018 The secondary flow generated by the clearance between an isolated airfoil tip and an end-plate is analyzed by means of a zonal large-eddy simulation, in comparison with available experimental data. The flow around the tip clearance is described with full large-eddy simulation, while Reynolds-averaged Navier-Stokes is employed in the rest of the ...
Boudet, Jérôme +4 more
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Spectral proper orthogonal decomposition of compressor tip leakage flow [PDF]
Physics of Fluids, 2021 To identify the spatiotemporal coherent structure of compressor tip leakage flow, spectral proper orthogonal decomposition (SPOD) is performed on the near-tip flow field and the blade surface pressure of a low-speed compressor rotor. The data used for the SPOD analysis are obtained by delayed-detached eddy simulation, which is validated against the ...
Xiao He +3 more
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Tip Leakage Flow in Axial Compressors [PDF]
Journal of Turbomachinery, 1990 Experimental measurements in a linear cascade with tip clearance are complemented by numerical solutions of the three-dimensional Navier–Stokes equations in an investigation of tip leakage flow. Measurements reveal that the clearance flow, which separates near the entry of the tip gap, remains unattached for the majority of the blade chord when the tip
J. A. Storer, N. A. Cumpsty
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Axial Flow Fan Tip Leakage Flow Control Using Tip Platform Extensions [PDF]
Journal of Fluids Engineering, 2010 Performance of an axial flow fan unit is closely related to its tip leakage mass flow rate and level of tip/casing interactions. The present experimental study uses a stereoscopic particle image velocimeter to quantify the three dimensional mean flow observed near the blade tip, just downstream of a ducted fan unit. After a comprehensive description of
Ali Aktürk, Cengiz Camci
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Unsteady Structure of Compressor Tip Leakage Flows
Volume 10A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, 2022 Abstract Direct numerical simulations (DNS) are performed of a cantilevered stator blade to identify the unsteady and turbulent flow structure within compressor tip flows. The simulations were performed with clearances of 1.6 and 3.2 percent of chord.
Maynard, Joshua M +3 more
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Aeroacoustic Investigation of a Single Airfoil Tip Leakage Flow [PDF]
International Journal of Aeroacoustics, 2010 Combined near and far field aeroacoustic measurements have been carried out during an original laboratory scale low Mach number (0–0.3) experiment about the tip leakage flow past a single non-rotating airfoil. Such measurements were made possible by the use of a single airfoil located in the potential core of an open jet flow in the anechoic wind ...
Jacob, Marc C. +3 more
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Shock Formation in Overexpanded Tip Leakage Flow [PDF]
Volume 1: Turbomachinery, 1992 Shock formation due to overexpansion of supersonic flow at the inlet to the tip clearance gap of a turbomachine has been studied. The flow was modelled on a water table using a sharp-edged rectangular channel. The flow exhibited an oblique hydraulic jump starting on the channel sidewall near the channel entrance.
J. Moore, K. M. Elward
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Tip Leakage Flow in Linear Compressor Cascade [PDF]
Journal of Turbomachinery, 1993 Tip leakage flow in a linear compressor cascade of NACA 65-1810 profiles is investigated, for tip clearance levels of 1.0, 2.0, and 3.25 percent of chord at design and off-design flow conditions. Velocity and pressure data are collected from three transverse sections inside tip clearance and sixteen sections within flow passage.
S. Kang, C. Hirsch
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Tip Leakage Flow in a Linear Turbine Cascade [PDF]
Journal of Turbomachinery, 1988 An experimental and analytical study of flow in the tip clearance gap of a linear turbine rotor blade cascade has been performed. Measurements of wall static pressures and flow velocities are used to verify a flow model involving a vena contracta, near the tip gap entrance, followed by flow mixing to fill the gap. A frequently referenced potential flow
J. Moore, J. S. Tilton
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