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Pressure Drop Characteristics in a Rotating Smooth Square Channel with a Sharp 180° Bend by S.V Prabhu; R.P Vedula is a Engineering article available to read on EtoBox.

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The results of an experimental study to investigate the local pressure drop characteristics in a square cross-sectioned smooth channel with a sharp 180°bend rotating about an axis normal to the free-stream direction are reported here. The sharp 180°turn was obtained by dividing a rectangular passage into two channels using a divider wall with a rounded tip at the location where the ̄ow negotiates the turn. The study was carried out for three ratios of divider wall thickness to hydraulic diameter (W/D), namely, 0.24, 0.37 and 0.73 all with a rounded tip divider wall and only for a bend with a W/D ratio of 0.37, the in ̄uence of a sharp tip divider wall was studied. Experiments were conducted for a Reynolds number varying from 10 000 to 17 000 with the rotation number xDaV varying from 0 to 0.38. The pressure drop distribution, normalized with the mainstream ̄uid dynamic pressure head, is presented for the leading, trailing and the outer surfaces. The results indicate that the local pressure drop characteristics in the bend region are signi®cantly aected by a change in the rotation number but the in ̄uence of the Reynolds number is weak. The friction factor is less sensitive to rot

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Author

S.V Prabhu; R.P Vedula

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0894-1777)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)