The blades of wind turbines are the most important parts in producing power output. In this study, a section of a 660 KW wind turbine blade will be installed in Iran in near future was tested in a wind tunnel. In addition to steady tests, various unsteady tests including the effects of reduced frequency, mean angle of attack, and amplitudes were carried out. The preliminary results show strong ...

Abstract Sustainability in construction of tunnel is very important to reduce environmental impact and also minimal use earth resources. Therefore, numerical modelling proposing at design stage achieved this objective. To evaluate the changes soil settlements during excavation, empirical, analytical, methods have been frequently applied movement research method effective anticipating possible u...

Feeder is one of the airships of the Multibody Advanced Airship for Transport (MAAT) system, under development within the EU FP7 project. MAAT is based on a modular concept composed of two different parts that have the possibility to join; respectively they are the so-called Cruiser and Feeder, designed on the lighter than air principle. Feeder, also named ATEN (Airship Transport Elevator Netwo...

The blades of wind turbines are the most important parts in producing power output. In this study, a section of a 660 KW wind turbine blade will be installed in Iran in near future was tested in a wind tunnel. In addition to steady tests, various unsteady tests including the effects of reduced frequency, mean angle of attack, and amplitudes were carried out. The preliminary results show strong ...

Low-frequency buffeting is a common problem in automobile wind tunnels, it induces pulsations of pressure and velocity the test section. A 1:15 3/4 open-jet return-type scaled tunnel was used for this research, numerical simulations tests were implemented to study flow characteristics jet shear layer model tunnel. The results show that guide devices on inner wall nozzle can effectively reduce l...

To investigate a new method which can reduce hazard distance by accidental explosion in underground ammunition storage facilities, several hazard reducing devices were reviewed. And the portal barricade in front of the portal was one of the IBD reducing devices studied. To investigate the effectiveness of portal barricades, a series of tests were conducted with concave shape portal barricades. ...

Abstract. This paper describes the development of a theoretical model for turbulence spectrum measured by short-range, continuous-wave lidar (light detection and ranging). The performance was assessed measurements conducted with two WindScanners in an open-jet wind tunnel equipped active grid, range different turbulent conditions. A hot-wire anemometer is used as reference to assess lidar's sta...

The superconductor-ferromagnet thermoelectric detector (SFTED) is a novel ultrasensitive radiation based on the giant effect in superconductorferromagnet tunnel junctions. We demonstrate analytical models and solutions time domain for SFTED operated as microcalorimeter (pulse excitation), linear smallsignal limit. Based these solutions, signal current temperature pulse response were studied two...