This paper tries to investigate the wind power potentiality in Bangladesh based on wind velocity data. For this purpose wind velocity data are taken for various locations in Bangladesh. From the data analysis, it is seen that the maximum wind potentiality is existing in Chittagong from the aspect of wind velocity.

It is known that wind turbines actually operate in the lower part of the atmospheric 11 boundary layer (ABL), the modelling of this ABL flow is an important precondition for the 12 simulations of wind turbine wakes. So, the capabilities of various inlet boundary conditions with 13 related modelling methodologies in constructing equilibrium ABL are validated firstly through 14 cases of a neutral...

Sonic anemometers are capable of measuring the wind speed in all three dimensions at high frequencies (10–50 Hz), and are relied upon to estimate eddy-covariance-based fluxes of mass and energy over a wide variety of surfaces and ecosystems. In this study, wind-velocity measurement errors from a three-dimensional sonic anemometer with a nonorthogonal transducer orientation were estimated for ov...

We demonstrate the use of a novel technique for the detection of heterodyne laser-induced thermal acoustic signals that allows the construction of a highly stable seedless laser velocimeter. A common-path configuration is combined with quadrature detection to provide flow direction, to greatly improve robustness to misalignment and vibration, and to give reliable velocity measurement at low-flo...

Turning back after engine failure during the take off phase of flight in a single engine aircraft is examined using a simplified analytical model. The important parameters are identified. The analysis shows that the optimum flight path is teardrop shaped with a 45◦ bank angle at stall velocity during the turn. The effects of engine failure altitude, wind direction and velocity, and bank angle o...

Comparative humidity of month (Sat.=1000) ...708 V.?Ravi -390 inch on the 9th, '303 on the 20th, *240 on the 21st, 1*352 on the 22nd, -127 on the 24th, and 018 on the 26th. Total 2*430 inches. VI.? Wind : 1. General direction, S., S.W., S.E., and E. 2. Velocity and pressure. Max. Min. Med. Horizontal velocity in 24 hours 663 miles 143 408 Average rate per hour ... 27 6 5 9 17*0 Tressure in poun...

Physical model of self-sustained infrasonic air oscillations related to interaction of fresh gale with choppy sea surface is proposed. It is shown that air infrasonic oscillations are expected inside moving 3D cavities in sea surface generated by gale and detected far from its region. Interaction of wind with moving sea wave crests is shown to be of weaker impact on oscillations in far field. F...