scholarly journals Final Report for''Numerical Methods and Studies of High-Speed Reactive and Non-Reactive Flows''

2002 ◽  
Author(s):  
D Schwendeman
2011 ◽  
Author(s):  
E. S. Oran ◽  
Jiachun Li ◽  
Song Fu
Keyword(s):  

1983 ◽  
Vol 37 (4) ◽  
pp. 247-254
Author(s):  
Kresho Frankich

Surveying computations are an integral part of the surveying profession. Until only a few decades ago they were performed by logarithms, mechanical calculators and slide rules. Mathematical models had to be given in forms suitable for the computational means available to the profession. The invention of digital or high-speed electronic computers led to a revolution in data handling and problem solving practices. The application of modern computers and calculators in surveying necessitates a radical reorganization of scientific research and everyday engineering work. Analytical methods of computations have not lost their importance, although the domains of their applications have changed. Computers brought a variety of numerical methods which, together with approximation theory, have become the most important part of surveying computations.


2011 ◽  
Vol 56 (4) ◽  
pp. 1-12 ◽  
Author(s):  
K. Richter ◽  
A. Le Pape ◽  
T. Knopp ◽  
M. Costes ◽  
V. Gleize ◽  
...  

A joint comprehensive validation activity on the structured numerical method elsA and the hybrid numerical method TAU was conducted with respect to dynamic stall applications. To improve two-dimensional prediction, the influence of several factors on the dynamic stall prediction was investigated. The validation was performed for three deep dynamic stall test cases of the rotor blade airfoil OA209 against experimental data from two-dimensional pitching airfoil experiments, covering low-speed and high-speed conditions. The requirements for spatial discretization and for temporal resolution in elsA and TAU are shown. The impact of turbulence modeling is discussed for a variety of turbulence models ranging from one-equation Spalart–Allmaras-type models to state-of-the-art, seven-equation Reynolds stress models. The influence of the prediction of laminar/turbulent boundary layer transition on the numerical dynamic stall simulation is described. Results of both numerical methods are compared to allow conclusions to be drawn with respect to an improved prediction of dynamic stall.


1993 ◽  
Author(s):  
R.M. Kakwani ◽  
R.E. Winsor ◽  
T.W. III Ryan ◽  
J.A. Schwalb ◽  
S. Wahiduzzaman ◽  
...  

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