Application of a Blowdown Wind Tunnel for Large‐Scale Acoustic Environmental Testing

1962 ◽  
Vol 1 (2) ◽  
pp. 8-11
Author(s):  
William H. Mayes ◽  
Philip M. Edge
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Environmental Testing

scholarly journals Nonintrusive Freestream Velocity Measurement in a Large-Scale Hypersonic Wind Tunnel

AIAA Journal ◽  
2017 ◽  
Vol 55 (10) ◽  
pp. 3611-3616 ◽  
Author(s):  
M. A. Mustafa ◽  
N. J. Parziale ◽  
M. S. Smith ◽  
E. C. Marineau
Keyword(s):  
Wind Tunnel ◽  
Velocity Measurement ◽  
Large Scale ◽  
Freestream Velocity ◽  
Hypersonic Wind Tunnel

Detailed Analysis of the Wake Structure of a Straight-Blade H-Darrieus Wind Turbine by Means of Wind Tunnel Experiments and Computational Fluid Dynamics Simulations

2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Alessandro Bianchini ◽  
Francesco Balduzzi ◽  
Giovanni Ferrara ◽  
Lorenzo Ferrari ◽  
Giacomo Persico ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Computational Fluid Dynamics ◽  
Wind Tunnel ◽  
Wind Turbines ◽  
Large Scale ◽  
Vertical Axis ◽  
Performance Estimation ◽  
Small Scale ◽  
Dynamics Simulations

Darrieus vertical axis wind turbines (VAWTs) have been recently identified as the most promising solution for new types of applications, such as small-scale installations in complex terrains or offshore large floating platforms. To improve their efficiencies further and make them competitive with those of conventional horizontal axis wind turbines, a more in depth understanding of the physical phenomena that govern the aerodynamics past a rotating Darrieus turbine is needed. Within this context, computational fluid dynamics (CFD) can play a fundamental role, since it represents the only model able to provide a detailed and comprehensive representation of the flow. Due to the complexity of similar simulations, however, the possibility of having reliable and detailed experimental data to be used as validation test cases is pivotal to tune the numerical tools. In this study, a two-dimensional (2D) unsteady Reynolds-averaged Navier–Stokes (U-RANS) computational model was applied to analyze the wake characteristics on the midplane of a small-size H-shaped Darrieus VAWT. The turbine was tested in a large-scale, open-jet wind tunnel, including both performance and wake measurements. Thanks to the availability of such a unique set of experimental data, systematic comparisons between simulations and experiments were carried out for analyzing the structure of the wake and correlating the main macrostructures of the flow to the local aerodynamic features of the airfoils in cycloidal motion. In general, good agreement on the turbine performance estimation was constantly appreciated.

Design of a Large Scale Vertical Stabilizer Wind Tunnel Model for Active Flow Control Research

2012 ◽  
Author(s):  
Glenn Saunders ◽  
Edward Whalen ◽  
Helen Mooney ◽  
Sarah Zaremski
Keyword(s):  
Wind Tunnel ◽  
Flow Control ◽  
Large Scale ◽  
Active Flow Control ◽  
Scale Model ◽  
Tunnel Model ◽  
Control Research ◽  
Model Geometry ◽  
Design Requirements ◽  
Active Flow

The design, fabrication and installation of an approximately 1/6 scale model of an aircraft vertical stabilizer for research in Active Flow Control (AFC) is discussed. Highlighted are the unique design requirements of wind tunnel models, the specialized fabrication techniques employed to create them and the required close collaboration between industry, government and three academic institutions. The design of the model involves often competing constraints imposed by structural, instrumentation, aerodynamic, manufacturability and research-agenda considerations as well as cost and schedule. Instrumentation requires hundreds of pressure ports and six-axis force/torque sensing. Aerodynamic considerations necessitate high manufacturing precision, highly-skilled fabrication techniques and careful observance of model geometry throughout the design and fabrication processes. A scale model of a vertical stabilizer for AFC research was successfully designed, fabricated and deployed. The collaboratively designed model satisfies the structural, aerodynamic and research design constraints, and furthers the state of the art in Active Flow Control research.

Wind Tunnel Experiments of Large Scale turbulence generated on Roughness Surface

2002 ◽  
Vol 2002.3 (0) ◽  
pp. 69-70
Author(s):  
Nobumasa SEKISHITA ◽  
Hideharu MAKITA ◽  
Shirohisa KOBAYASHI
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Wind Tunnel Experiments ◽  
Roughness Surface ◽  
Scale Turbulence
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