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 to a speed of 20%. The measurement reading of the manometer for the drag force was recorded. The procedure was repeated with the augmentations of the speed the10percentage. The calibration was steady and the scale was converted into the reading of the drag force through utilizing of the wind tunnel calibration curve in the determination of the velocity of the underlying air flow from the corresponding reference static pressure reading.Drag force normally acts on the direction of the opposing motion thus being considered as the aerynamic friction. The rough ball values for the existing drag coefficient attained utilizing identical via the slope of the graph. Moreover, the slope depicts that the experimental error values. The prevailing drag coefficient against the Reynolds numbers uses the logarithmic scale. The alteration within the drag coefficient of the open hemisphere coupled with the circular disc results to the Reynolds numbers, which is identical to the values on the moody chart. Moreover, the total drag of the body results from the pressure drag and corresponding friction drag. Pressure drag occurs because of the underlying disturbance of the existing flow stream that results when the body develops turbulent wake.Moreover, friction drag occurs due to the existence of the thin layers of the fluid on the surface body. Moreover, the magnitude of the prevailing of the drag coefficient for the pressure drag majorly emanates from the shape of the body, Reynolds’s number, influence of the underlying bodies coupled with the surface roughness. The error in the measurement results from the balancing of the underlying weight of the wind
Fluid Mechanics, ENGI 1635 Lab Manual.
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