Author: Koji IsogaiPublisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
Calculation of Unsteady Transonic Flow Over Oscillating Airfoils Using the Full Potential Equation
Author: Koji IsogaiNumerical Study of Transonic Flow Over Oscillating Airfoils Using the Full Potential Equation
Author: Koji IsogaiPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 52
Book Description
Calculation of 2-D Unsteady Transonic Full Potential Flow about Oscillating Airfoils by Two Complementary Approaches
Author: Harmen SchippersAn Exploratory Study of a Finite Difference Method for Calculating Unsteady Transonic Potential Flow
Author: Calculation of Viscous Effects on Transonic Flow for Oscillating Airfoils and Comparisons with Experiment
Author: James T. HowlettComputer Programs for Calculating Small Disturbance Transonic Flows about Oscillating Airfoils
Author: J. L. Farr (Jr.)Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 140
Book Description
Computer programs are described which implement a small disturbance potential flow theory for the two-dimensional unsteady transonic flow about thin airfoils undergoing low reduced frequency harmonic oscillations. The theory is based upon the treatment of the unsteady flow as a small perturbation to the steady transonic flow. Separating the perturbation potential into a steady and unsteady component results in a pair of coupled boundary value problems for the components. The governing equation for the steady perturbation potential is the usual nonlinear transonic potential equation and it is solved in computer program STRANS using the mixed differencing relaxation procedure of Murman and Cole. The governing equation for the unsteady perturbation potential is linear and, for the harmonic boundary disturbance considered, of mixed elliptic hyperbolic type depending on the local nature of the steady potential. Using a steady solution previously generated by STRANS, computer program UTRANS solves the unsteady potential equation by the same relaxation procedure. The solution procedures are found to be quite efficient, permitting the calculation of unsteady aerodynamic forces to engineering accuracy in a few minutes on a CDC 6600 computer.
Small Disturbance Transonic Flows about Oscillating Airfoils
Author: R. M. TraciPublisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 126
Book Description
A theory and numerical solution method are presented for the problem of two-dimensional unsteady transonic flow about thin airfoils undergoing harmonic oscillation. The theory is based on a treatment of the unsteady flow as a small perturbation on the non-linear steady flow. The governing equations for the steady and unsteady perturbation potentials are of mixed elliptic/hyperbolic type and are solved by the mixed differencing line relaxation technique of Murman and Cole. Detailed steady and unsteady calculations are performed and compared when possible to available experimental data. The solution procedure is found to be highly efficient and promises further improvements in efficiency through the use of extrapolation schemes. Also the method can be generalized in a straightforward manner to perform calculations with supersonic freestreams and three-dimensional finite wing calculations. (Author).
Computation of Unsteady Transonic Flow about Airfoils in Frequency Domain Using the Full-potential Equation
Author: Horng-Ren HwangNumerical Calculation of Unsteady Inviscid Rotational Transonic Flow Past Airfoils Using Euler Equations
Author: Murali DamodaranPublisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 582
Book Description
A Bibliography of Recent Developments in Unsteady Transonic Flow
Author: Christopher J. BorlandPublisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 78
Book Description
A bibliography of recent developments in unsteady transonic flow is presented. Papers have been divided into survey, experimental, and theoretical classifications, selected publications have been reviewed, and a more comprehensive set of publications has been listed and summarized in tabular form. Primary emphasis has been placed on numerical solution of unsteady transonic flow problems. Relevant steady methods have been included. (Author)