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Boundary-layer measurements were made in non-recirculating air duct with circular, square, and rectangular types of inlet, and results compared with those obtained from numerical solution of boundary-layer equations; effect of conduit Reynolds number on growth of laminar and turbulent boundary layers in inlet portion of conduit was studied; comparison showed that energy reduction is higher for rectangular inlet and least for circular one; this is because near zero-pressure-gradient conditions are attained sooner in rectangular inlet as effect of elliptic curve of broad faces; graphs are given showing coefficients of energy reduction as functions of relative distance into inlet and Reynolds number.
Boundary-layer measurements were made in non-recirculating air duct with circular, square, and rectangular types of inlet, and results compared with those obtained from numerical solution of boundary-layer equations; effect of conduit Reynolds number on growth of laminar and turbulent boundary layers in inlet portion of conduit was studied; comparison showed that energy reduction is higher for rectangular inlet and least for circular one; this is because near zero-pressure-gradient conditions are attained sooner in rectangular inlet as effect of elliptic curve of broad faces; graphs are given showing coefficients of energy reduction as functions of relative distance into inlet and Reynolds number.
Boundary-layer development at curved conduit entrances
ASCE -- Proc (J Hydraulics Div)
Rao, P.V. (author)
1968
23 pages
Article (Journal)
English
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Boundary-Layer Development at Curved Conduit Entrances
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