Wind Tunnel Experiment on the Wind Effects of Low-Rise Buildings in Rural Areas

2015 ◽  
Vol 724 ◽  
pp. 166-170
Author(s):  
Pu Qing Wang ◽  
Yan Tao Li ◽  
Yuan Ming Dou ◽  
Jing Jing Zhang
Keyword(s):  
Wind Tunnel ◽  
Rural Areas ◽  
Building Design ◽  
Wind Load ◽  
Structure Design ◽  
Wind Effects ◽  
Wind Tunnel Experiments ◽  
Shape Coefficient ◽  
Property Loss ◽  
Made In

At the present stage, no detailed specifications and codes about wind effects on low-rise buildings in rural areas were made in Chinese. In order to reduce casualties and property loss due to wind damage, the investigation of wind tunnel experiments were carried out. The results indicate that the influence of purlin and front and rear eaves on wind load should be considered in building design. Because a specific blowing angle of wind would produce the largest wind load in the surface of the house. In the structure design, the value of shape coefficient should be increased to a certain degree and also amplify according to windward and leeward roofs.

Note on the Possibility of Flight by Human Power

1937 ◽  
Vol 41 (319) ◽  
pp. 609-611
Author(s):  
H. C. H. Townend
Keyword(s):  
Wind Tunnel ◽  
Point Of View ◽  
Wind Tunnel Experiments ◽  
Dynamic Soaring ◽  
Human Power ◽  
Made In

The object of this note is to draw attention to a few facts which, taken together, suggest that, from a purely aerodynamic point of view, the difficulties involved in flight by human power may not be as great as is generally supposed.Some years ago, in a lecture delivered to the Royal Aeronautical Society, the German soaring pilot, Lippisch, referred to an account of dynamic soaring given by Lanchester in his “ Aerodonetics ” and to some wind tunnel experiments made in Vienna.

scholarly journals Drop Shapes and Axis Ratio Distributions: Comparison between 2D Video Disdrometer and Wind-Tunnel Measurements

2009 ◽  
Vol 26 (7) ◽  
pp. 1427-1432 ◽  
Author(s):  
M. Thurai ◽  
V. N. Bringi ◽  
M. Szakáll ◽  
S. K. Mitra ◽  
K. V. Beard ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Close Agreement ◽  
Drop Diameter ◽  
Wind Tunnel Experiments ◽  
Axis Ratio ◽  
Wind Tunnel Measurements ◽  
Mean Shape ◽  
The Mean ◽  
Ratio Versus ◽  
Made In

Abstract Comparisons of drop shapes between measurements made using 2D video disdrometer (2DVD) and wind-tunnel experiments are presented. Comparisons are made in terms of the mean drop shapes and the axis ratio distributions. Very close agreement of the mean shapes is seen between the two sets of measurements; the same applies to the mean axis ratio versus drop diameter. Also, in both sets of measurements, an increase in the oscillation amplitudes with increasing drop diameter is observed. In the case of the 2DVD, a small increase in the skewness was also detected. Given that the two sets of measurements were conducted in very different conditions, the agreement between the two sets of data implies a certain “robustness” in the mean shape of oscillating drops that may be extended to natural raindrop oscillations, at least in steady rainfall and above the surface layer.

The Wind Tunnel Experiment Study of Wind Load on Jack-Up Drilling Unit

2012 ◽  
Author(s):  
Lin Yi ◽  
An-kang Hu ◽  
Jiang Wei ◽  
Xiong Fei
Keyword(s):  
Wind Tunnel ◽  
Wind Load ◽  
Wind Tunnel Experiment ◽  
Shape Coefficient ◽  
Reynolds Number Effects ◽  
Calculation Results ◽  
Drilling Unit ◽  
Aerodynamic Interference ◽  
Storm Condition ◽  
Jack Up

Owing to the characteristics of the Jack-up drilling unit, the environment loads are important factors to the structure safety of jack-up. The wind load takes up a much larger proportion in structure analysis, and it has been now paid more and more attention in the field of offshore engineering. According to the MODU rule, the projected area method is used to calculate wind load. The height coefficient Ch and shape coefficient Cs are chosen by experience listed in MODU rule. However, the aerodynamic interference between platform components, such as wind shielding effects and acceleration flow effects are ignored. So the calculation results in accordance with MODU rule are conservative, and not good for structure optimization designing to some degree. Therefore, the wind tunnel experiment is very important and necessary. In this paper, a 400ft jack-up, which is developed by CIMC, is studied as an example. Considering the Reynolds number effects, the wind loads of jack-up both in normal drilling condition and severe storm condition are obtained in the experiment. Compared with the results, which are calculated according to MODU rule, it indicates that the experiment results are less, and the effect of aerodynamic interference and updraft can’t be ignored.

Numerical Wind Tunnel Simulation of Wind Loads on a Solar Photovoltaic Power Generation Station

2012 ◽  
Vol 232 ◽  
pp. 252-255 ◽  
Author(s):  
Shi Min Xu ◽  
Hua Gui Huang ◽  
Si Qiang Yu ◽  
Peng Wang
Keyword(s):  
Power Generation ◽  
Solar Cells ◽  
Wind Tunnel ◽  
Elevation Angle ◽  
Wind Load ◽  
Structure Design ◽  
Gobi Desert ◽  
Solar Photovoltaic ◽  
Photovoltaic Power ◽  
Tunnel Model

Aiming at the wind load evaluation in the mechanical structure design of solar photovoltaic power generation station with sun tracking, a numerical wind tunnel model was established based on the computational fluid dynamics theory and finite element method. The 8-level wind velocity was applied in the model considering the mal-condition of reef islands and Gobi desert where the solar photovoltaic power generation station usually installed. From the numerical simulation results, the influence of elevation angle of the solar cells on the wind load was presented. To decrease the maximum wind load on the power station, the gap between solar cells was proposed as air vent in this paper, which has been adopted in a prototype machine, and more than 20% of the equipment weight has been reduced.

The Acrylic Spike Design of British Pavilion, 2010 EXPO

2011 ◽  
Vol 255-260 ◽  
pp. 1558-1562
Author(s):  
De Can Mao ◽  
Wei Xing Li ◽  
Marco Cerini
Keyword(s):  
Mechanical Properties ◽  
Wind Tunnel ◽  
Structural Design ◽  
Wind Load ◽  
Structure Design ◽  
Creep Tests ◽  
Load Effect ◽  
Service Period ◽  
Structural Engineers

Innovative architectural acrylic spike application leads to a great challenge for structural engineers for the structural design of Shanghai Expo British pavilion. A set of mechanical properties has been proposed to provide a reference for the application of acrylic material in structure design area. The wind tunnel, fatigue and creep tests and research for acrylic spike were carried out to determine the wind load effect of spike and ensure that the spikes are not damaged under fatigue and creep effects during 1.5 years service period.

The Wind Tunnel Experiment Study of Wind Load on Jack-Up Drilling Unit

2013 ◽  
Author(s):  
An-kang Hu ◽  
Yi Lin ◽  
Wei Jiang
Keyword(s):  
Wind Tunnel ◽  
Wind Load ◽  
Wind Tunnel Experiment ◽  
Shape Coefficient ◽  
Reynolds Number Effects ◽  
Calculation Results ◽  
Drilling Unit ◽  
Aerodynamic Interference ◽  
Storm Condition ◽  
Jack Up

Owing to the characteristics of the Jack-up drilling unit, the environment loads are important factors to the structure safety of jack-up. The wind load takes up a much larger proportion in structure analysis, and it has been now paid more and more attention in the field of offshore engineering. According to the MODU rule, the projected area method is used to calculate wind load. The height coefficient Ch and shape coefficient Cs are chosen by experience listed in MODU rule. However, the aerodynamic interference between platform components, such as wind shielding effects and acceleration flow effects are ignored. So the calculation results in accordance with MODU rule are conservative, and not good for structure optimization designing to some degree. Therefore, the wind tunnel experiment is very important and necessary. In this paper, a 400ft jack-up, which is developed by CIMC, is studied as an example. Considering the Reynolds number effects, the wind loads of jack-up both in normal drilling condition and severe storm condition are obtained in the experiment. Compared with the results, which are calculated according to MODU rule, it indicates that the experiment results are less, and the effect of aerodynamic interference and updraft can’t be ignored.

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