Author: Donald P. RizzettaPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Numerical Simulation of the Interaction Between a Leading-edge Vortex and a Vertical Tail
Author: Donald P. RizzettaNumerical Simulation of the Interaction Between a Leading-edge Vortex and a Flexible Vertical Tail
Author: Scott A. MortonHigh Performance Computing Contributions to DoD Mission Success
Author: Numerical Simulation of Leading-edge Vortex Flow
Author: Hendrik Willem Marie HoeijmakersPublisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
Numerical Simulation of Leading-edge Vortex Flow
Author: H. W. M. HoeijmakersPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 30
Book Description
Numerical Simulation of the Interaction of a Vortex with Stationary Airfoil in Transonic Flow
Author: G. R. SrinivasanPublisher:
ISBN:
Category :
Languages : en
Pages : 22
Book Description
A perturbation form of an implicit conservative, noniterative numerical algorithm for the two-dimensional thin layer Navier-Stokes and Euler equations is used to computer the interaction flow field of a vortex with stationary airfoil. A Lamb-like analytical vortex having a finite core is chosen to interact with a thick (NACA 0012) and a thin (NACA 64A006) airfoil independently in transonic flow. Two different configurations of vortex interaction are studied: (1) when the vortex is fixed at one location in the flow field; and (2) when the vortex is convecting past the airfoil at free stream velocity. Parallel computations of this interacting flow field are also done using a version of the Transonic Small Disturbance Code (ATRAN2). A special treatment of the leading edge region for thin airfoils is included in this code. With this, the three methods gave qualitatively similar results for the weaker interactions considered in this study. However, the strongest interactions considered proved to be beyond the capabilities of the small disturbance code.
Numerical Simulation of Leading-edge Vortex Rollup and Bursting
Author: Steven Allan BrandtPublisher:
ISBN:
Category :
Languages : en
Pages : 210
Book Description
Vortex aerodynamics has played an important role in the development of high performance aircraft in recent years. Although computer codes which solve the three dimensional Euler equations have been used extensively to study leading-edge vortices, they don't include physical viscosity effects associated with vortex flows. The Euler solvers do, however, contain numerical viscosity. As a result, viscosity effects in the Euler solutions such as vortex core size, vortex burst location, leading edge separation, and vortex rollup often do not agree quantitatively with results of physical experiments. The present work defines models for these physical viscosity effects which can be coupled with an Euler solver to improve modeling of vortex physics. A vortex core model is derived from the steady, incompressible Navier-Stokes equations written in cylindrical coordinates. The core model is coupled with an Euler solver and tested on a variety of delta wings over a range of angles of attack. The resulting surface pressure distributions and vortex burst locations are shown to be much closer than results from Euler codes alone. Theses. (jhd).
International Aerospace Abstracts
Author: Methods for Numerical Simulation of Leading-edge Vortex Flow
Author: Hendrik Willem Marie HoeijmakersPublisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Author: