Scaling and extrapolating small-scale in-flow wind tunnel jet noise to full-scale flyover jet noise

1997 ◽  
Author(s):  
Christopher Allen ◽  
Paul Soderman ◽  
Christopher Allen ◽  
Paul Soderman
Keyword(s):  
Wind Tunnel ◽  
Jet Noise ◽  
Full Scale ◽  
Small Scale

Investigations of Ship Airwakes Using Concurrent Computations and Experiments

2021 ◽  
Author(s):  
David Farish ◽  
Dhuree Seth ◽  
Regis Thedin ◽  
Sven Schmitz
Keyword(s):  
Boundary Layer ◽  
Wind Tunnel ◽  
Atmospheric Boundary Layer ◽  
Particle Image Velocimetry Data ◽  
Full Scale ◽  
Large Eddy Simulations ◽  
Small Scale ◽  
Computational Techniques ◽  
Dynamic Interface ◽  
Large Eddy

Using computational techniques established in previous full-scale dynamic interface simulations, small-scale large eddy simulations of Embry-Riddle Aeronautical University's Boundary-Layer Wind Tunnel were conducted. The ultimate goal of the study is to serve as a useful point of validation for full-scale airwake data provided to flight simulators used to develop flight software and train rotorcraft pilots for shipboard operations. Cowdrey rods were used in the wind tunnel to develop the turbulence and sheared inflow similar to an atmospheric boundary layer. Hot-wire anemometry and particle image velocimetry data were compared to OpenFOAM large eddy simulation data. In uniform inflow conditions, it was found that despite the reduced Reynolds number of the scaled setup, the computational airwake data agreed quite well with larger-scale wind tunnel experiments and full-scale large eddy simulations of the same ship model, but showed less asymmetry spanwise across the flight deck. Comparisons of the experimental and computational simulated atmospheric boundary-layer inflow show good agreement in the time-averaged velocity profile and velocity contours along the ship's centerline. It was further found that the computations while capturing the major flow structures, overpredict the turbulence intensities and turbulent kinetic energy in the ship airwake. The present study provides some confidence that full-scale coupled atmospheric boundary layer/ship airwake solvers are accurate and can assist in improving dynamic interface simulations.

Wind Tunnel to Full Scale Mapping of Winds and Loads for Launch-Vehicle Ground Wind Loads

2021 ◽  
Author(s):  
Thomas G. Ivanco ◽  
Donald F. Keller ◽  
Jennifer L. Pinkerton
Keyword(s):  
Wind Tunnel ◽  
Launch Vehicle ◽  
Full Scale ◽  
Wind Loads

scholarly journals Upscaling THM modeling from small-scale to full-scale in-situ experiments in the Callovo-Oxfordian claystone

2021 ◽  
Vol 144 ◽  
pp. 104582
Author(s):  
D.M. Seyedi ◽  
C. Plúa ◽  
M. Vitel ◽  
G. Armand ◽  
J. Rutqvist ◽  
...  
Keyword(s):  
Full Scale ◽  
Small Scale ◽  
In Situ Experiments

Characterization of wind-induced pressure on membrane roofs based on full-scale wind tunnel testing

2021 ◽  
Vol 235 ◽  
pp. 112101
Author(s):  
Johnny Estephan ◽  
Changda Feng ◽  
Arindam Gan Chowdhury ◽  
Mauricio Chavez ◽  
Appupillai Baskaran ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Full Scale ◽  
Wind Tunnel Testing ◽  
Tunnel Testing

Full Scale Fatigue Experiment on Submarine Pipelines

2014 ◽  
Vol 633-634 ◽  
pp. 659-664 ◽  
Author(s):  
Zong Tao Fang ◽  
De Yu Tang ◽  
Yan Hua Hu ◽  
Hu Li Niu
Keyword(s):  
Welded Joints ◽  
Fatigue Property ◽  
Full Scale ◽  
Small Scale ◽  
Test Machine ◽  
Butt Joints ◽  
Weld Toe ◽  
Small Test ◽  
Weld Root ◽  
Fatigue Experiment

This paper focus on fatigue problem of submarine pipelines, four points bending full scale fatigue experiment were conducted on X65 pipelines butt joints specimens, utilizing pipeline full scale fatigue test machine developed by CNPC. Meanwhile contrast test was also carried out on small specimens. The results show that the fatigue strength of full scale welded joints is lower than the small scale joints. Owing to having no regard for the influence of residual stress and size effect, the small test would provide dangerous results. The fatigue property of full scale welded joints only meets the requirement of DNV C203 W3 curve, and meets the needs of DNV C203 F3 curve basically while not meet BS 7608 F2 curve’s requirements which relatively demand higher. Weld toe and geometric discontinuous near weld root is the weak point for the whole welded joints.

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