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Friday, August 7, 2020 | History

3 edition of Aerodynamic interaction between vortical wakes and lifting two-dimensional bodies found in the catalog.

Aerodynamic interaction between vortical wakes and lifting two-dimensional bodies

Aerodynamic interaction between vortical wakes and lifting two-dimensional bodies

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Published by National Aeronautics and Space Administration, Ames Research Center, For sale by the National Technical Information Service in Moffett Field, Calif, [Springfield, Va .
Written in English

    Subjects:
  • Viscous flow.

  • Edition Notes

    StatementPaul M. Stremel.
    SeriesNASA technical memorandum -- 101074.
    ContributionsAmes Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14661833M

    The near wakes of such body limbs feature recirculation regions whose width and length are governed not only by the taper of the body parts, but also by the presence of coherent streamwise vortical structures. Moreover, the interaction with the wakes of the upstream body parts plays a role in the local wake : W. Terra, A. Sciacchitano, F. Scarano. aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies has been developed to address this helicopter problem. The vorficity and flow field velocities are calculated on a body-fitted computational mesh using an uncoupled iterative solution. The interacting vortexFile Size: 1MB.

      Mittal, R. & Balachandar, S. a Vortical structures in bluff body wakes. AIAA 33rd Aerospace Sciences Meeting, Jan 9–12, Reno, Nevada, Paper 95– Mittal, R. & Balachandar, S. b Effect of three-dimensionality on the lift and drag of nominally two-dimensional by:   Associated with lift production is the similar power imbalance between the two half strokes. Further analysis shows that in addition to the angle of attack, wing velocity and surface area, drag-based force and wing–wake interaction also contribute significantly to Cited by:

    For a UHA Blackhawk helicopter, three challenging level flight conditions are computed: 1) high speed, μ=, with advancing blade negative lift, 2) low speed, μ=, with blade–vortex interaction, and 3) high thrust with dynamic stall, μ= Results are compared with UHA Airloads Program flight test data.   This paper reports the results of an experimental investigation on a two-dimensional (2-D) wing undergoing symmetric simple harmonic flapping motion. The purpose of this investigation is to study how flapping frequency (or Reynolds number) and angular amplitude affect aerodynamic force generation and the associated flow field during flapping for Cited by:


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Aerodynamic interaction between vortical wakes and lifting two-dimensional bodies Download PDF EPUB FB2

Aerodynamic surfaces of a helicopter have a significant influence on its aerodynamic performance, the ride quality, and vibration. aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies has been developed to address this helicopter problem.

tional mesh using finite-difference Size: 1MB. A numerical method for computing the aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies was developed to address this helicopter problem. The method solves for the flow field velocities on a body-fitted computational mesh using finite-difference : Paul M.

Stremel. Get this from a library. Aerodynamic interaction between vortical wakes and lifting two-dimensional bodies. [Paul M Stremel; Ames Research Center.]. A numerical method for computing the aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies has been developed to address this helicopter problem.

The method solves for the flow field velocities on a body-fitted computational mesh using finite-difference : Paul M. Stremel. A numerical method for computing the aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies was developed to address this helicopter problem.

The method solves for the flow field velocities on a body-fitted computational mesh using finite-difference : Paul M. Stremel. In the design analysis of conventional aircraft configurations, the prediction of the strong interaction between vortical wakes and the viscous flow field about bodies is of considerable importance.

Interactions between vortical wakes and aircraft components are even more common on rotorcraft and configurations with lifting surfaces forward of the : P.

Stremel. Method for Aerodynamic Analysis of Wind Turbines at Peak Power between vortical wakes and lifting two-dimensional bodies the aerodynamic interaction between an. Assuming that the rigid-body motion of the airfoil in a quiescent environment can be decomposed into a translational motion of velocity U(t) and a rotational motion of angular velocity (t).

Both the translational and the rotational motions can be incorpo- rated into the boundary condition at the solid- uid Size: 2MB.

The results of the experimental campaign are reported in terms of lift and drag coefficients, as well as in the form of driving and heeling force coefficients. In the former case, the effects of the aerodynamic interaction occurring between the two Flettner rotors are shown on the lift and drag coefficients of each : G.

Bordogna, S. Muggiasca, S. Giappino, M. Belloli, J.A. Keuning, R.H.M. Huijsmans. Readers are suggested to study " Bluff Body Aerodynamics and Wake Control " by Efstathios Konstantinidis and Demetri Bouris [15] for further study.

On the other hand, a. A numerical method for computing the aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies.

A numerical method for computing the aerodynamic interaction between an interacting vortex wake and the viscous flow about arbitrary two-dimensional bodies Author: Devi Prasad Pulla. This paper deals with interactions of the wakes of two flapping wings on aerodynamic characteristics in hover.

With dynamically scaled-up robotic wings installed in a water tank, the effects of both the shape of motion profiles and the mean flapping angle of the wings (the average location of the wings with respect to pivots) were investigated.

Experimental study on the heat transfer of heat sink with bio-mimetic oscillating foil. Numerical analysis of wake structure and performance of two oscillatory mechanisms of a foil: Pure pitching and undulating.

Measurements of the flow due to a Cited by: Results in the present paper are focused on the aerodynamics and interaction noise of a turbofan modeled as an annular cascade.

The model accounts for the inflow-fan-duct coupling and the high frequency of the interaction process. Two high-order numerical algorithms are developed with body-fitted coordinate by: 7.

Aeroacoustic Computation of Cylinder Wake Flow. Optimization of bluff bodies for aerodynamic drag and sound reduction using CFD analysis. Aerodynamic interaction between vortical wakes and the viscous flow about a Cited by: Aerodynamic Interactions Between Contralateral Wings and Between Wings and Body of a Model Insect at Hovering and Small Speed Motions are the x b - y b - and z b -axes components of the total aerodynamic force of the body, respectively.

The aerodynamic moments of the body No.4 LIANG Bin et al. / Chinese Journal of Aeronautics 24() Cited by: 8. Flow structures produced by hovering insects have also been visualized,13 The relation between vortical structures induced by the flap motions and aerodynamic forces of a tethered fruit fly was experimentally investigated The leading-edge vortex created by dynamic stall enhances liftCited by: To better show the aerodynamic interactions between the near wake of the turbine and the turbulent boundary layer convecting over the duct surface, 2D visualization in the x-y plane of the instantaneous flow fields are shown in Fig.

10 (a)-(d). The Aerodynamic Interaction Between an Inverted Wing and a Rotating Wheel 18 September | Journal of Fluids Engineering, Vol.No.

10 Active Flow Control for Practical High-Lift SystemsCited by:. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA is dominated by separated, highly vortical behavior. The purpose of this study is to investigate the aerodynamic characteristics and control effectiveness of the high-alpha flow of the Hot Eagle Vertically Landing Lifting Body geometry.

Several test cases were performed utilizing Detached Eddy Simulations (DES) to both analyze and controlCited by: 1. The Aerodynamic Interaction Between an Inverted Wing and a Rotating Wheel 18 September | Journal of Fluids Engineering, Vol.No.

10 Whole-body lift and ground effect during pectoral fin locomotion in the northern spearnose poacher (Agonopsis vulsa)Cited by: