Wind Tunnel Essay Example | Topics and Well Written Essays - 1000 words

Wind Tunnel - Essay Example Moreover, the drag ought to oppose force within the opposite direction in order maintain or escalates the velocity of the object. The drag on the body resulted from pressure drag and corresponding friction drag. Pressure drag normally emanates from the disturbance of the new flow stream as it passes the prevailing body thus developing the turbulent wake. Pressure drag relies on the roughness of the surface, shape of the prevailing body coupled with the Reynolds number of the flow and the corresponding effect of supplementary body. The pressure relies on the prevailing roughness of the surface, the shape of the objects, the underlying Reynolds number of the existing flow coupled with the influence of the supplementary of the body. Moreover, the friction drag is normally measured for the objects moving at the flow velocity within the vicious that results to extremely low Reynolds numbers. In case the fluid stream flows of the body corresponds to the surface of the prevailing body, the boundary layer segregates the surface resulting formed from the turbulent. The net force from the pressure drag is normally developed from the pressure of the relatively lower stagnation location of the body. Moreover, the pressure drag is dimisheshed in case the separation takes place on the back due to the occurrences of the corresponding reduction. The drag is designated as 22 when the drag force is 22 where is d designates drag force ( N), and Cd depicting drag coefficient . The density of the underlying medium is expressed as Si Unit of kg/ m3. The velocity of the object is designated as V and projection area. The firs specimen was mounted on the open hemisphere within the wind tunnel struts offered on the three components balance. The zero mark was adjusted to the position of the counter balance weights till the bubbles within the spirits levels were centralized with the underlying jockey. The wind tunnel was started and the dial was adjusted