In South Korea, where mountainous terrain accounts for a significant proportion of the country, tunnels are essential reaching destinations via shortest possible route. Tunnels high-traffic areas with only two exits, making them vulnerable to large-scale disasters in event fire. However, existing longitudinal-flow-type exhaust systems (jet fans) insufficient effective smoke during tunnel Herein...

Researchers at Iowa State University (ISU) are developing next generation wind tunnels for studying primarily wind effects on structures. The Wind Simulation and Testing Laboratory in the Department of Aerospace Engineering and Engineering Mechanics will house facilities that simulate straight-line, thunderstormand tornado-like winds. This paper describes the motivation for advancing the state ...

the renewable energy resources such as wind power have recently attracted more researchers’ attention. it is mainly due to the aggressive energy consumption, high pollution and cost of fossil fuels. in this era, the future fluctuations of these time series should be predicted to increase the reliability of the power network. in this paper, the dynamic characteristics and short-term predictabili...

Studies of the mechanical performance of birds during flight are rarely accomplished with wild birds because accurate tracking of flight paths is necessary. In this study, we present data from three species of tern as they flew along a straight flight path on the north Norfolk coast, UK. Measurement of wind speed and the time taken to fly a set distance allowed direct calculation of the airspee...

in this paper, the 10-minutes period measured wind speed data at different heights (10 m, 30 m, and 40 m) are presented for khvaf, which is one of the major counties with high wind potential in khorasan provinces in iran. to the author’s knowledge, there hasn’t been any assessment works in the mentioned site. from the primary evaluation and by determining mean wind speed and also the weibull fu...

wind erosion climatic factor is a measure of climatic factors explaining the wind erosion erosivity. humidity and wind speed are climatic characteristics that must be considered as the erosion parameters. in this study, linear moment analysis (l-moments) and wind erosion climatic factor were used to evaluate the regional climate’s tendency effect on wind erosion in yazd province. wind erosion c...

Abstract This starting wind speed calibration system is developed on the basis of tunnel design theory, with hot-wire anemometer as standard instrument, single-chip microcomputer reading and control center, power section uses PWM technology to fan rotate. The suitable for automatic EL15-1A/1C, ZQZ-TF, EC9-1 other common sensors indoors or site without (wind speed<0.2m/s). According test, wit...

The aerodynamics of high-speed vehicles in evacuated tunnels is studied with particular reference to the consequences choked flow conditions at tails vehicles. It shown that this has a dominant influence on overall (pressure, temperature, velocity). Together need for tunnel system be closed, high speeds cause aerodynamic behaviour differ greatly from conventional railway tunnels. A key purpose ...