Wake-vortex
An Experimental and Numerical Study on Wake Vortex Noise of a Low Speed Propeller Fan
... measured wake of the rotating blade is compared at the two major operation points in Figure ...the wake at the maximum effi- ciency point becomes narrower than that of the width at the off-design point in ...
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Research Concerning the Interaction between the Ground and the Turbulent Aircraft Wake Vortex
... trace of these vortices in the sky. These vortices have a life that can be quite long. The biggest problem relates to the risk of incidents caused by the meeting of an aircraft with a turbulent wake vortex ...
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Comparison of a coupled near- and far-wake model with a free-wake vortex code
... Axial force distributions for a partial pitch comparison at 8 m s −1 are shown in Fig. 15. In this case, only the outer half of the blade is pitched from 5 to 0 ◦ over 1 s. As shown in the left plot of Fig. 15, the ...
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Near-Wake Flow Dynamics of a Horizontal Axis Wind Turbine
... near wake region is characterized by a vortex structure resulting from the interaction between the upstream flow and the vorticity sheets generated at the blades and convected ...this wake ...
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An overview of a Lagrangian method for analysis of animal wake dynamics
... the vortex momentum can be determined from the distribution of vorticity ...and wake vortex added mass and expressed the vortex momentum based on the bulk motion of the vortex and its ...
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Study on Vortex induced Vibration Characteristics of Large Slenderness Ratio Tandem Risers
... riser wake vortex, the downstream direction of the downstream riser and the transverse flow response amplitude are much larger than the upstream riser when the flow velocity is large, and the coupling of ...
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Dust resuspension by the flow around an impacting sphere
... recirculating wake region behind the ...the wake vortex which is initially behind the sphere threads over the sphere’s surface, generating a secondary vortex ...the wake and secondary ...
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The Interaction Vortex Flow Around Two Bluff Cylinders
... a wake vortex street is ...alternate vortex street is formed in independent from two circular ...near wake, in the former region, it will be more divided into two regions by gap ratio ...the ...
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A Systematic Presentation of the Theory of Thin Airfoils in Non-Uniform Motion
... After a calculation of the induction effects of a wake vortex, it is shown hov; the lift and moment acting upon an airfoil in the two-dimensional case may be c[r] ...
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Analysis of pressure losses in the diffuser of a control valve
... Due to the wake vortex behind a cone the velocity field in the diffuser throat is significantly distorted. Maximum velocity occurs near the diffuser wall while in its middle section the velocity may have ...
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Lift and Thrust Characteristics of Flapping Wing Aerial Vehicle with Pitching and Flapping Motion
... and wake vortex affect the thrust in Equation (8); 2) which vortex is mainly to produce thrust; 3) effect of the section of flapping wing on aerodynamic ...
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Near Wake of a Horizontal Circular Cylinder in Stably Stratified Flows
... stratified wake of a tilted cylin- der, that the tendency of stabilization of the von Karman vortex street which can be seen with a moderate stratify- cation is not efficient in a strongly stratified flow ...
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Experimental research on cavitation in a water tunnel at the University of Michigan
... of vortex shedding in the street accurately. When the vortex shedding frequency lies close to a resonance frequency of a nearby mechanical system large deflections and fatigue cracks are likely to occur ...
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Performance and wake characteristics of a tidal turbine under yaw
... the wake generated by the upstream turbines may cause significant disturbance to the downstream turbines; a scenario that is enhanced if the incoming flow was at an angle (commonly referred to as yaw) to the ...
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Aerodynamics of F1 car side mirror
... The illuminated particle images were captured using a Dantec HiSense CCD camera (1280 × 1024 pixels, 8bits/pixel) with a 62 𝑚𝑚 length, which was synchronized with the laser so as to implement the so-called ‘double ...
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Wake Development behind Paired Wings with Tip and Root Trailing Vortices: Consequences for Animal Flight Force Estimates
... the wake of a blackcap Sylvia atricapilla ...a vortex ring model to calculate a value for lift that accounted for ...the vortex model by integration over the time period of one wing beat (equations 1 ...
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Fast swimming hydromedusae exploit velar kinematics to form an optimal vortex wake
... case vortex growth was extended until T* ⬇ 8, recent theoretical studies suggest that vortex formation can, in principle, be extended by another 35%, approaching T* ⬇ 11 (Kaplanski and Rudi, ...the ...
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Kinematics of flight and the relationship to the vortex wake of a Pallas' long tongued bat (Glossophaga soricina)
... Kinematic data were collected using two synchronized high-speed cameras (Redlake MotionScope PCI 500, 250Hz, 1/1250s; Tallahassee, FL, USA) recording the bats from the dorsal [x–y] and side [x–z] views (supplementary ...
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Modelling of stationary three-dimensional separated air flows around an Ahmed reference model
... The vortex wake system takes the form of two counter-rotary lateral vortices (T) starting at a separation line AB, and we observe an open separation bulb, D, located at the upper part of the rear window ...
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Unsteady aerodynamics of offshore floating wind turbines using free vortex wake model
... The wake used for calculating the induced velocity is extended up to 3 diameters distance after the rotor ...dynamic wake produce close ...free wake model from the in-board sections to the mid-span ...
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