scholarly journals RTRI's Large-scale Low-noise Wind Tunnel and Wind Tunnel Tests

2001 ◽  
Vol 42 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Tatsuo MAEDA ◽  
Yoshihiko KONDO
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Low Noise ◽  
Wind Tunnel Tests

Experimental and numerical investigation of novel Savonius wind turbine

2018 ◽  
Vol 43 (3) ◽  
pp. 247-262 ◽  
Author(s):  
Palanisamy Mohan Kumar ◽  
M Mohan Ram Surya ◽  
Srikanth Narasimalu ◽  
Teik-Cheng Lim
Keyword(s):  
Wind Tunnel ◽  
Wind Turbines ◽  
High Speed ◽  
Large Scale ◽  
Numerical Study ◽  
Low Noise ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Horizontal Axis Wind Turbines ◽  
Thrust Load

Savonius wind turbines have distinct advantages in terms of simplicity, low noise, and ease of manufacturing, yet they are not preferred for large-scale power generation due to their lower aerodynamic performance and high wind loads. This study is aimed at reducing the thrust load with retractable type telescopic blades. This novel telescopic Savonius turbine is tested in an open jet wind tunnel to assess the performance in terms of torque, power, and thrust on the rotor. The dynamic and static characteristics are obtained for both extended and retracted configuration after correcting the experimental data for wind tunnel blockage. A preliminary numerical study is carried out in an effort to determine the variation of the drag coefficient in relation to the bucket thickness. The proposed telescopic turbine demonstrates a reduction in thrust load of 72.4% with a maximum power coefficient of 0.14 at the tip speed ratio of 0.7 compared to an extended operating configuration, similar to a conventional Savonius turbine. Thus, the telescopic Savonius turbine can be scaled up to higher kilowatt capacity with the cost comparable to other high-speed rotors such as Darrieus or horizontal axis wind turbines.

Local wind characteristics on bridge deck of twin-box girder considering wind barriers by large-scale wind tunnel tests

2020 ◽  
Vol 103 (1) ◽  
pp. 751-766
Author(s):  
Jingyu Zhang ◽  
Mingjin Zhang ◽  
Yongle Li ◽  
Yizhe Qian ◽  
Bing Huang
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Bridge Deck ◽  
Local Wind ◽  
Box Girder ◽  
Wind Tunnel Tests ◽  
Wind Characteristics

Anomaly Detection in Large-Scale Wind Tunnel Tests Using Gaussian Processes

2017 ◽  
Author(s):  
Ian Crandell ◽  
Anthony J. Millican ◽  
Scotland Leman ◽  
Eric Smith ◽  
William N. Alexander ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Anomaly Detection ◽  
Gaussian Processes ◽  
Large Scale ◽  
Wind Tunnel Tests

Large-scale wind tunnel tests of an ejector-lift STOVL aircraft model

1989 ◽  
Author(s):  
VICTOR CORSIGLIA ◽  
MICHAEL DUDLEY ◽  
BRIAN SMITH ◽  
JOSEPH FARBRIDGE
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Wind Tunnel Tests ◽  
Aircraft Model

Experimental Study on Suppression of Vortex-Induced Vibration of Central-Slotted Box Girder by Aerodynamic Countermeasures

2014 ◽  
Vol 638-640 ◽  
pp. 1067-1078
Author(s):  
Ting Yang ◽  
Zhi Yong Zhou
Keyword(s):  
Wind Tunnel ◽  
Large Scale ◽  
Vibration Measurement ◽  
Test Results ◽  
Box Girders ◽  
Vortex Induced Vibration ◽  
Wind Tunnel Tests ◽  
Long Span ◽  
Bridge Model ◽  
Sectional Model

To study the mechanism on the vortex resonance characteristics of the central-slotted box girders, the large-scale sectional model vibration measurement and pressure measurement are employed. This paper takes a long-span cable-stayed bridge over the Yangtze River as an example to conduct the wind tunnel tests of large-scale sectional model. The test results indicate that it is the inside maintenance rails located in the aerodynamic susceptible sites that cause the vortex-induced vibration (VIV) of bridge model. Accordingly, the inside maintenance rails are proposed to be moved towards the central axis by a certain distance. The static pressure test results show that when shifting the inside maintenance rails, the negative mean pressure at the soffit plate knuckle line will not change dramatically, the fluctuating pressures on the upwind and downwind inclined panels can be reduced, and the fluctuating energy will be dispersed without a consistent predominant frequency. Wind tunnel tests of modified section are conducted and the results show that the VIV of bridge model can be suppressed completely due to the shift of inside rails.

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