A Comparison of Lifting-Line and CFD Methods with Flight Test Data from a Research Puma Helicopter


Book Description

Four lifting-line methods were compared with flight test data from a research Puma helicopter and the accuracy assessed over a wide range of flight speeds. Hybrid CFD methods were also examined for two high-speed conditions. A parallel analytical effort was performed with the lifting-line methods to assess the effects of modeling assumptions and this provided insight into the adequacy of these methods for load predictions.




Computational Fluid Dynamics Techniques


Book Description

First published in 1995. Routledge is an imprint of Taylor & Francis, an informa company.







Algorithms for Zonal Methods and Development of Three Dimensional Mesh Generation Procedures


Book Description

The goal of this research was to further develop zonal methods and three dimensional procedures for application of finite difference methods to solve complex aircraft configurations. For the task of three dimensional grid generation both elliptic and hyperbolic methods were developed. A chimera grid scheme, that is, the use of overset multiple grid systems, was also tested in two dimensions. In zonal methods several new algorithms were developed. These included combining transonic potential codes with thin layer Navier-Stokes equations, unsteady transonic potential, Euler and vector potential codes. This report summarizes the various numerical algorithms that were studied. (Author).







Application of a Three-dimensional Steady and Unsteady Full Potential Method for Transonic Flow Computations


Book Description

This report describes a study performed to evaluate a 3D, full potential, computational method developed at the Lockheed-Georgia. This computational method was used to compute both steady and unsteady compressible flows about an F-5 fighter wing model. Comparisons are made between computed steady and unsteady aerodynamic data and available experimental data for the F-5 planform. Correlations are presented for steady, unsteady and quasi-steady surface pressure distributions and integrated loads coefficients. Originator-assigned keywords include: Computational fluid dynamics, Unsteady aerodynamics, and Transonic flow.