Evaluation of the Wright 1901 Glider Using Full-Scale Wind-Tunnel Data

2003 ◽  
Vol 40 (3) ◽  
pp. 417-424 ◽  
Author(s):  
Kevin Kochersberger ◽  
Robert Ash ◽  
Ash Britcher ◽  
Drew Landman ◽  
Ken Hyde
Keyword(s):  
Wind Tunnel ◽  
Full Scale ◽  
Wind Tunnel Data

Comparison of RANS and Detached Eddy Simulation Results to Wind-Tunnel Data for the Surface Pressures Upon a Class 43 High-Speed Train

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Justin A. Morden ◽  
Hassan Hemida ◽  
Chris. J. Baker
Keyword(s):  
Wind Tunnel ◽  
Surface Pressure ◽  
High Speed ◽  
Model Comparison ◽  
Computational Cost ◽  
Full Scale ◽  
Cost Comparison ◽  
Detached Eddy Simulation ◽  
Eddy Simulation ◽  
Wind Tunnel Data

Currently, there are three different methodologies for evaluating the aerodynamics of trains; full-scale measurements, physical modeling using wind-tunnel, and moving train rigs and numerical modeling using computational fluid dynamics (CFD). Moreover, different approaches and turbulence modeling are normally used within the CFD framework. The work in this paper investigates the consistency of two of these methodologies; the wind-tunnel and the CFD by comparing the measured surface pressure with the computed CFD values. The CFD is based on Reynolds-Averaged Navier–Stokes (RANS) turbulence models (five models were used; the Spalart–Allmaras (S–A), k-ε, k-ε re-normalization group (RNG), realizable k-ε, and shear stress transport (SST) k-ω) and two detached eddy simulation (DES) approaches; the standard DES and delayed detached eddy simulation (DDES). This work was carried out as part of a larger project to determine whether the current methods of CFD, model scale and full-scale testing provide consistent results and are able to achieve agreement with each other when used in the measurement of train aerodynamic phenomena. Similar to the wind-tunnel, the CFD approaches were applied to external aerodynamic flow around a 1/25th scale class 43 high-speed tunnel (HST) model. Comparison between the CFD results and wind-tunnel data were conducted using coefficients for surface pressure, measured at the wind-tunnel by pressure taps fitted over the surface of the train in loops. Four different meshes where tested with both the RANS SST k-ω and DDES approaches to form a mesh sensitivity study. The four meshes featured 18, 24, 34, and 52 × 106 cells. A mesh of 34 × 106 cells was found to provide the best balance between accuracy and computational cost. Comparison of the results showed that the DES based approaches; in particular, the DDES approach was best able to replicate the wind-tunnel results within the margin of uncertainty.

Evaluation of the Wright 1902 Glider Using Full-Scale Wind-Tunnel Data

2005 ◽  
Vol 42 (3) ◽  
pp. 710-717 ◽  
Author(s):  
K. B. Kochersberger ◽  
D. Landman ◽  
J. L. Player ◽  
K. W. Hyde
Keyword(s):  
Wind Tunnel ◽  
Full Scale ◽  
Wind Tunnel Data

An evaluation of the Wright 1901 Glider using full scale wind tunnel data

2002 ◽  
Author(s):  
K. Kochersberger ◽  
R. Sandusky ◽  
K. Hyde ◽  
R. Ash ◽  
C. Britcher ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Full Scale ◽  
Wind Tunnel Data

Flight Measurements of Blade-Vortex Interaction Noise Including Comparisons With Full-Scale Wind Tunnel Data

1996 ◽  
Vol 41 (4) ◽  
pp. 291-301 ◽  
Author(s):  
Gloria K. Yamauchi ◽  
David B. Signor ◽  
Michael E. Watts ◽  
Francisco J. Hernandez ◽  
Philip LeMasurier
Keyword(s):  
Wind Tunnel ◽  
Full Scale ◽  
Vortex Interaction ◽  
Blade Vortex Interaction ◽  
Wind Tunnel Data ◽  
Flight Measurements
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