The density of the underlying medium is expressed as Si Unit of kg/ m3. Te velocity of the object is designated as V and projection area. Te firs specimen was mounted on the open hemisphere within the wind tunnel struts offered on the three components balance. Te 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. Te wind tunnel was started and the dial was adjusted to a speed of 20%. Te measurement of the manometer for the drag force was recorded.
Te procedure was repeated with the augmentations of the speed the10percentage. Te 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. Dag force normally acts on the direction of the opposing motion thus being considered as the aerynamic friction. Te rough ball values for the existing drag attained utilizing identical via the slope of the graph.
Mreover, te slope depicts that the experimental error values. Te prevailing drag coefficient against the Reynolds numbers uses the logarithmic scale. Te alteration within the drag coefficient of the open hemisphere coupled with the circular disc results to the Reynolds numbers, wich is identical to the values on the moody chart. Mreover, te total drag of the body results from the pressure drag and corresponding friction drag. Pessure drag occurs because of the underlying disturbance of the existing flow stream results when the body develops turbulent wake.
Mreover, fiction drag occurs due to the existence of the thin layers of the fluid on the surface body. Mreover, te magnitude of the prevailing of the drag coefficient for the pressure drag majorly emanates from the shape of the body, Rynolds’s number, ifluence of the underlying bodies coupled with the surface roughness. Te error in the measurement results from the balancing of the underlying weight of the wind...
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