[PDF] Top 20 Analysis of tip leakage flow noise inception in axial fans
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Analysis of tip leakage flow noise inception in axial fans
... with tip clearance flow and more generally turbomachinery flowfield investigation as a ...small tip clearances encountered and the highly turbulent and unsteady nature of tip clearance ... Voir le document complet
302
Prediction of the unsteady turbulent flow in an axial compressor stage. Part 2: Analysis of unsteady RANS and LES data
... amplitude of some frequencies which are not correlated to the BPF in the range [0, 2 × BP F ] is of the same order of magnitude than the BPF ...The analysis of the LES results is ... Voir le document complet
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Analysis of Aerodynamically Induced Whirling Forces in Axial Flow Compressors
... Importance of the Alford β Parameter In the case of a steady shaft offset the tip-clearance asym- metry frame is identical to the absolute ...offset of ∆ε = 0 : 7%. To analyze the ... Voir le document complet
11
Forces Exerted on a Cylinder in Near-Axial Flow
... turbulent flow, with an isotropic turbulence model. From a global point of view, the lift forces obtained by RANS CFD calculations are close to the experimental results for inclinations lower than 5 ◦ ... Voir le document complet
15
Effects of axial rectangular groove on turbulent Taylor-Couette flow from analysis of experimental data
... stants in the behavior of the velocity fields and notable structural differences compared to smooth surface ...no axial periodicity is observed indicating the absence of large coherent struc- ... Voir le document complet
13
Airfoil Tip Leakage Aeroacoustics Predictions using a Lattice Boltzmann Based Method
... Broadband Noise Sources topology for tip gap width of 0 mm (a), 5 mm (b) and 10 mm (c): FIND Acoustic Power isosurface at -10 dB[latticeVolume] between 500 Hz and 5 kHz ...Angle of attack ... Voir le document complet
18
Information Leakage by Trace Analysis in QUAIL
... estimation of leakage via trace analysis would follow a different path, as explained in Algorithm 3 ...percentage of traces analyzed or a time ...twice. In that case, the ... Voir le document complet
18
Design, build and test of an axial flow hydrokinetic turbine with fatigue analysis
... Epps (201 Oa) describes the procedure implemented in OpenProp to conduct a parametric design study, optimize a single turbine design and perform off-design analysis. For turb[r] ... Voir le document complet
94
Numerical simulation of turbulent flow upstream of the inception point in a stepped channel
... characters of the boundary layer, a system of non linear parabolic equations governing the flow has been ...system of equation has been ...position of inception of air ... Voir le document complet
9
Leakage flow simulation in a specific pump model
... and analysis Let us first examine the global results: the non-dimensional static pump head, the non-dimensional isentropic pump head, the impeller efficiency, the diffuser efficiency and the pump ...influence ... Voir le document complet
11
Theoretical and numerical analysis of counter-flow parallel convective exchangers considering axial diffusion
... influence of the convection leak inside the outlet, as well as the possible upstream back- conduction in the ...aim of this contribution is to further explore the influence of inlet/outlet ... Voir le document complet
15
Divergence modes of a cluster of simply supported arrays in axial flow
... observed in both series of calculations is that two cylinders are attracted towards each other when the gap is reduced, and repulsed when it is ...cylinders in the direction perpendicular to the ... Voir le document complet
7
Temporal DNS of short-wave instabilities in vortex pairs with axial flow.
... Department of Mechanical Engineering, Monash University, Melbourne, Victoria 3800, Australia (Received 15 mai 2008) In this study, the temporal evolution of the short-wavelength elliptic instability ... Voir le document complet
40
Axial Compressor Blade Design for Desensitization of Aerodynamic Performance and Stability to Tip Clearance
... ffect of Chordwise Camberline Change The camberline change was achieved by modifying the chordwise camber at each spanwise location beyond ...the flow turning was kept constant, but the shape of the ... Voir le document complet
152
Experimental investigation of mixing and axial dispersion in Taylor–Couette flow patterns
... estimation of the unmixed core volume in WVF regime is not straightforward, since its boundaries are evolving due to the traveling wave: Its position and its apparent size vary over time with the passage ... Voir le document complet
17
Experimental investigation of mixing and axial dispersion in Taylor–Couette flow patterns
... passage of the azimuthal ...tracking of many fluid ...encing axial dispersion and mixing ...observed in WVF regime, the wave induced motion contributes strongly to their volume reduction and ... Voir le document complet
18
Leakage Flow Influence on SHF pump model performances
... influence of leakage flow existing in SHF pump model on the analysis of internal flow behaviour inside the vane diffuser of the pump model performance using both ... Voir le document complet
10
Numerical Approach Dedicated to Nozzle Tip Clearance Flow Analysis in Variable Geometry Radial Turbines
... As the flow topology in a turbine stage directly depends on both the geometry stator opening and the operating point, secondary flow topologies which cross the stator–rotor interface noz[r] ... Voir le document complet
11
Hydrodynamic instabilities in swirling flow under axial magnetic fiel
... The present paper investigates numerically the hydrodynamic instabilities occurring in a cylindrical container filled with a conducting viscous fluid and submitted to an axial[r] ... Voir le document complet
1
Generic Properties of Flows in Low-Speed Axial Fans Operating at Load-Controlled Windmill
... To summarize, in this paper, three major topics are investigated on a conventional fan and on an optimized one in an attempt to identify the specific and generic windmilling properties: [r] ... Voir le document complet
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