scholarly journals Experimental Results from the Active Aeroelastic Wing Wind Tunnel Test Program

2005 ◽  
Author(s):  
Jennifer Heeg ◽  
Vic Spain ◽  
James Florance ◽  
Carol Wieseman ◽  
Tom Ivanco ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Experimental Results ◽  
Test Program

STOVL Hot Gas Ingestion Control Technology

1989 ◽  
Author(s):  
K. C. Amuedo ◽  
B. R. Williams ◽  
J. D. Flood ◽  
A. L. Johns
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Scale Model ◽  
Nasa Lewis Research ◽  
Control Technology ◽  
Test Program ◽  
Hot Gas ◽  
Vertical Landing ◽  
Low Speed Wind Tunnel ◽  
Face Temperature

A comprehensive wind tunnel test program was conducted to evaluate control of Hot Gas Ingestion (HGI) on a 9.2% scale model of the McDonnell Aircraft Company model 279-3C advanced Short Takeoff and Vertical Landing (STOVL) configuration. The test was conducted in the NASA-Lewis Research Center 9 foot by 15 foot Low Speed Wind Tunnel during the summer of 1987. Initial tests defined baseline HGI levels as determined by engine face temperature rise and temperature distortion. Subsequent testing was conducted to parametrically evaluate HGI control using: Lift Improvement Devices (LIDs), forward nozzle splay angle, combination of LIDs and forward nozzle splay angle, and main inlet blocking. The results from this test program demonstrate that HGI can be effectively controlled and that HGI is not a barrier to STOVL aircraft development.

STRUCTURAL DESIGN USING A WIND TUNNEL TEST PROGRAM AND A RISK ANALYSIS

1984 ◽  
pp. 27-36
Author(s):  
GARY C. HART ◽  
JON D. RAGGETT ◽  
SAMPSON HUANG ◽  
SUZANNE DOW
Keyword(s):  
Wind Tunnel ◽  
Risk Analysis ◽  
Structural Design ◽  
Wind Tunnel Test ◽  
Test Program

scholarly journals Hyper-X Stage Separation Wind-Tunnel Test Program

2001 ◽  
Vol 38 (6) ◽  
pp. 811-819 ◽  
Author(s):  
William C. Woods ◽  
Scott D. Holland ◽  
Michael DiFulvio
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Test Program ◽  
Stage Separation

On the Performance of the Savonius Wind Turbine

1989 ◽  
Vol 111 (1) ◽  
pp. 71-81 ◽  
Author(s):  
V. J. Modi ◽  
M. S. U. K. Fernando
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Preliminary Design ◽  
Pressure Data ◽  
Test Program ◽  
Central Vortex ◽  
Optimum Configuration ◽  
Semiempirical Approach ◽  
Savonius Wind Turbine ◽  
Prototype Design

An extensive wind tunnel test program is described which assesses the relative influence of system parameters on the Savonius rotor performance. The parametric study leads to an optimum configuration with an increase in efficiency by around 100 percent compared to the reported efficiency of ≈12–15 percent. Of particular interest is the blockage correction procedure which is vital for application of the wind tunnel results to a prototype design, and facilitates comparison of data obtained by other investigators. Next, using the concept of a central vortex, substantiated by a flow visualization study, a semiempirical approach to predict the rotor performance using measured stationary blade pressure data is developed. The simple approach promises to be quite effective in predicting the rotor performance, even in the presence of blockage, and should prove useful at least in the preliminary design stages.

Analysis and Comparison of Experimental Results Both of Wind Tunnel Test and Running Test for HEMU-400X Pantograph

2012 ◽  
Author(s):  
Yeongbin Lee ◽  
Jin-sung Paik ◽  
Minho Kwak ◽  
Jinsun Yoo ◽  
Kyu Hong Kim ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Lift Force ◽  
Wind Tunnel Test ◽  
Aerodynamic Characteristics ◽  
Experimental Results ◽  
Maximum Speed ◽  
Scaled Model ◽  
Vertical Lift ◽  
Contacting Force

In this paper, experimental results both of wind tunnel test and running test for HEMU-400X pantograph were compared and were analyzed. In wind tunnel test, 1/4scale pantograph for HEMU-400X which is being developed for the maximum speed of 400km/h in Korea were tested to investigate the vertical lift force of pantograph at the operational speed of 250, 270, 300, 330, 360 and 400km/h using lift estimation from 1/4 scaled model results. In the running test of train, the contacting force of pantograph was measured to current operational speed of 300km/h. Finally, the results of vertical lift force of pantograph in wind tunnel test and contacting force for the running test were compared to analyze the aerodynamic characteristics of the pantograph for HEMU-400X.

STOVL Hot Gas Ingestion Control Technology

1991 ◽  
Vol 113 (1) ◽  
pp. 68-74 ◽  
Author(s):  
K. C. Amuedo ◽  
B. R. Williams ◽  
J. D. Flood ◽  
A. L. Johns
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Scale Model ◽  
Nasa Lewis Research ◽  
Control Technology ◽  
Test Program ◽  
Hot Gas ◽  
Vertical Landing ◽  
Low Speed Wind Tunnel ◽  
Face Temperature

A comprehensive wind tunnel test program was conducted to evaluate control of Hot Gas Ingestion (HGI) on a 9.2 percent scale model of the McDonnell Aircraft Company model 279-3C advanced Short Takeoff and Vertical Landing (STOVL) configuration. The test was conducted in the NASA-Lewis Research Center 9 ft by 15 ft Low Speed Wind Tunnel during the summer of 1987. Initial tests defined baseline HGI levels as determined by engine face temperature rise and temperature distortion. Subsequent testing was conducted to evaluate HGI control parametrically using Lift Improvement Devices (LIDs), forward nozzle splay angle, a combination of LIDs and forward nozzle splay angle, and main inlet blocking. The results from this test program demonstrate that HGI can be effectively controlled and that HGI is not a barrier to STOVL aircraft development.

Study of the dynamic response of a CAARC building by the synthetic wind method and comparison with different approaches

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Lucas Willian Aguiar Mattias ◽  
Carlos Andres Millan Paramo
Keyword(s):  
Wind Tunnel ◽  
Dynamic Response ◽  
Good Accuracy ◽  
Wind Tunnel Test ◽  
Power Spectra ◽  
Tall Buildings ◽  
Experimental Results ◽  
Content Type ◽  
Different Types ◽  
Numerical Approaches

Purpose This paper analyzes the effect that is generated in the dynamic response of a Commonwealth Advisory Aeronautical Council building for different types of power spectra. This article also compares synthetic wind method (SWM) results with wind tunnel tests and other numerical approaches.Design/methodology/approach One of the main methodologies developed in Brazil, the SWM, is employed to determine the dynamic wind loads. The Davenport, Lumley and Panowski, Harris, von Karman and Kaimal model are used in SWM to generate the resonant harmonics. Lateral pressures are calculated by the wind speed deflection profile for 30, 35, 40 and 45 m/s. The structure is processed in Autodesk Robot Structural Analysis with numerical analysis in FEM by the Hilber–Hughes–Taylor method. To corroborate the synthetic wind with experimental results, displacement curves are developed for wind tunnel experimental results, Davenport method, Eurocode and NBR 6123, together with the SWM.Findings Results show that for 30 m/s, the lowest convergence of the power spectra models was presented and that the greatest difference found was below 10%. In addition, it was shown that Eurocode 1-4 can lead to oversizing, while NBR 6123 can lead to undersizing, compared with the experimental results. Finally, results by the Davenport method, wind tunnel test and synthetic wind showed good accuracy.Originality/value By carrying out this comparative analysis, this work presents an important contribution in the field of calculating the dynamic response of tall buildings. Studies with these comparisons to corroborate the SWM had not yet been carried out.

Sign in / Sign up

Export Citation Format

Share Document