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- W2033844710 abstract "The effects of a base step in the exit plane of a slot on a supersonic jet blown over a convex coanda surface has been studied experimentally on a planar or two-dimensional model. An axisymmetric model has been used to study the effects of blowing radially outward over an axisymmetric coanda surface. Of particular interest is the jet structure and the conditions for the jet to break away from the surface. A complex flow field is revealed, with compression and expansion waves in the underexpanded core of the jet interacting with the outer free shear layer of the jet and with the boundary layer on the coanda surface, giving rise to separation bubbles on the surface. It is the growth and amalgamation of separation bubbles as the blowing pressure is increased that causes separation. The radial expansion effect with axisymmetry and the effect of a base step both enhance breakaway performance by reducing the shock cell length scale of the underexpanded jet and so reducing the size of separation bubbles. The direct application of this work was to the design of flares in the petroleum industry, but the work is also relevant to a wide range of coanda devices from blown jets for boundary-layer control to air movers and fluidic devices." @default.
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- W2033844710 date "1994-08-01" @default.
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- W2033844710 title "The effects of base steps and axisymmetry on supersonic jets over coanda surfaces" @default.
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- W2033844710 doi "https://doi.org/10.1016/0142-727x(94)90014-0" @default.
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