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Wednesday, July 22, 2020 | History

3 edition of Numerical study of steady and unsteady canard-wing-body aerodynamics found in the catalog.

Numerical study of steady and unsteady canard-wing-body aerodynamics

Numerical study of steady and unsteady canard-wing-body aerodynamics

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  • 38 Currently reading

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

    Subjects:
  • Canard configurations.,
  • Unsteady aerodynamics.,
  • Navier-Stokes equation.,
  • Flow distribution.,
  • Control surfaces.,
  • Aircraft configurations.,
  • Aerodynamic configurations.,
  • Aerodynamic characteristics.,
  • Wings.

  • Edition Notes

    StatementEugene L. Tu.
    SeriesNASA technical memorandum -- 110394.
    ContributionsAmes Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15498139M

    During this period a tremendous development in the field of unsteady aerodynamics and aeroelasticity in turbomachines has taken place. As steady-state flow conditions become better known, and as blades in the turbomachine are constantly pushed towards lower weight, and higher load and efficiency, the importance of unsteady phenomena appear more. In this paper an effective method is developed to study aerodynamic characteristics of a flying wing micro air vehicle (MAV). The method is based on momentum source method (MSM), low Mach number preconditioning and lower-upper symmetric Gauss-Seidel (LU-SGS) implicit dual time-stepping algorithm on hybrid dynamic meshes. The S-A turbulence model is also applied to capture flow separation.

      Introduction. The study of boundary layer flow and heat transfer inducted by stretching surface has attracted considerable interest due to its wide applications in industrial processes such as the cooling of an infinite metallic plate in a cooling bath, the aerodynamic extrusion of plastic sheets, boundary layer along the material handling conveyers, the boundary layer along a liquid film and. Downloadable (with restrictions)! Numerical simulations using RANS-based CFD have been utilised to carry out investigations on the effects of steady and unsteady wind on the performance of a wind tunnel scale VAWT. Using a validated CFD model, steady wind simulations at U∞=7m/s were conducted and results have shown a typical performance curve prediction for this particular VAWT scale.

      The numerical methods for computing the stability derivatives of the aircraft by solving unsteady sensitivity equations which was proposed in our previous papers was extended to solve three-dimensional problems in this paper. Both the static and dynamic derivatives of the hypersonic blunt cone undergoing pitching oscillation around a fixed point were computed using the new methods. The paper presents the analysis of unsteady forces and their influence on the aerodynamics and motion of a wing-in-ground (WIG) effect craft. Two-dimensional and three-dimensional aerodynamic models based on the potential flow are coupled with time domain simulations in the longitudinal plane. A special attention is paid to the explanation of the dynamic ground effect on both the sink and.


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Numerical study of steady and unsteady canard-wing-body aerodynamics Download PDF EPUB FB2

Numerical Study of Steady and Unsteady Canard-Wing-Body Aerodynamics Eugene L. Tu, Ames Research Center, Moffett Field, California August National Aeronautics and Space Administration Ames Research Center Moffett Field, California. Numerical study of steady and unsteady canard-wing-body aerodynamics (OCoLC) Microfiche version: Tu, Eugene L.

Numerical study of steady and unsteady canard-wing-body aerodynamics (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource. Numerical study of steady and unsteady canard-wing-body aerodynamics (OCoLC) Online version: Tu, Eugene L.

Numerical study of steady and unsteady canard-wing-body aerodynamics (OCoLC) Material Type: Government publication, National government publication, Internet resource: Document Type: Book, Internet Resource: All Authors. The steady and unsteady effects of the canard on surface pressure integrated forces and moments, and canard-wing vortex interaction are presented in detail including the effects of the canard on the static and dynamic stability characteristics.

The current study provides an understanding of the steady and unsteady canard-wing-body : L. Tu Eugene. The rest of this paper is organized as follows. The numerical methods and validation are presented in Section 2, and the steady and unsteady aerodynamic characteristics of a morphing wing with a flexible leading-edge are discussed in Section 3.

Section 4 provides the conclusions of this study. Numerical method and validation Author: Numerical study of steady and unsteady canard-wing-body aerodynamics book Kan, Daochun Li, Tong Shen, Jinwu Xiang, Lu Zhang.

Numerical simulation of unsteady aerodynamic characteristics of the three-dimensional composite motion of a flapping wing based on overlapping nested grids delta canard-wing-body configuration.

A numerical iterative solution to the classical Prandtl lifting-line theory, suitably modified for poststall behavior, is used to study the aerodynamic characteristics of straight rectangular. Through wind tunnel experiments and three-dimensional numerical simulation, the quasi-steady and unsteady flows aerodynamic characteristics of short cylinder and TSB (L / D ≤ 1) are investigated in critical regime, while particularly the scanning angle and roll angle both vary over a.

Steady and unsteady numerical acoustic performance prediction of the compressor is also completed at near surge operating point where the noise level is expected to be significantly high.

Pressure spectra of the noises at various probe points in the inlet and exit ducts are also estimated using the detached eddy simulation method. The unsteady transonic aerodynamics of a wing-body configuration is investigated by solving the Unsteady Reynolds-averaged Navier-Stokes equations closed with the full Reynolds Stress Model.

This work presents the prediction of flow field characteristics during deep shock-buffet penetration of a transport aircraft-representative geometry. Mach number ofand Reynolds number of 5. A new type of horizontal axis wind turbine adopting the Archimedes spiral blade is introduced for urban-use.

Based on the angular momentum conservation law, the design formula for the blade was derived using a variety of shape factors.

The aerodynamic characteristics and performance of the designed Archimedes wind turbine were examined using computational fluid dynamics (CFD) simulations. We conducted a numerical simulation of ventilated supercavitation from a forward-facing cavitator in unsteady flows generated by a gust generator under different gust angles of at.

Steady and Unsteady Transonic Flow. Numerical study of the turbulent transonic interaction and transition location effect involving optimisation around a supercritical aerofoil. Computation of unsteady transonic aerodynamic responses using a prescribed input steady state pressure distribution.

A computational study of laminar-flow secondary separation on a slender delta wing. The Aeronautical Journal, Vol. Issue. p. E.L. Numerical study of steady and unsteady Canard-Wing-Body Aerodynamics, W.L.

Numerical study of the turbulent flow past an air foil with trailing edge separation, AIAA J, Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume ) Abstract The main aim is to evaluate the aerodynamic characteristics of a projected wind tunnel model and an estimation of mechanical loads for the structural dimensioning.

A numerical modeling of insect flight is addressed. Unsteady aerodynamics around a flapping wing is studied by using a time accurate solution of the three-dimensional, incompressible, laminar.

Heat transfer and flow characteristics of channel-bounded circular cylinder with a slit vent parallel to the flow direction are numerically investigated using openfoam. The intere. The numerical model is implemented in the aero-elastic code Flex5, featuring the unsteady BEM method and the Morison equation for the modelling of aerodynamics and hydrodynamics, respectively.

It was calibrated with the tests by matching key system features, namely the steady thrust curve and the decay tests in water. The main aim of this research is to study the effect of steady and quasi-unsteady wind on a symmetric and an asymmetric airfoil as well as the capability of the DMST method to predict quasi-unsteady loads.

According to the results, both symmetric. Downloadable. A new type of horizontal axis wind turbine adopting the Archimedes spiral blade is introduced for urban-use.

Based on the angular momentum conservation law, the design formula for the blade was derived using a variety of shape factors.

The aerodynamic characteristics and performance of the designed Archimedes wind turbine were examined using computational fluid dynamics (CFD. Eight aerodynamic derivatives of the cable and the rivulet were also identified based on the experimental data, and these aerodynamic derivatives can be further used to determine the unsteady self-excited aerodynamic forces on the cable and rivulet.() A numerical study on a Cartesian-based body-fitted adaptive grid method.

International Journal of Computational Fluid Dynamics() A high-order and conservative method is developed for the numerical treatment of interface conditions in patched grids, based on the use of a fictitious grid methodology.steady approach, resulting in time-averaged values with no information on the unsteady features of the flow.

Among these, some investigations have shown that quasi-steady approach does a good job on predicting the aerodynamic coefficients and physics of flow.

Previous studies on Gurney flap have shown that the calculated aerodynamic coefficients.