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A planar pulsating jet
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DOI：10.1017/S0022112009991261.png)
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摘要
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We are concerned with the behaviour of a two-dimensional jet that issues from a planar orifice, with a 'top-hat' profile. At the orifice the steady flow Is modulated by a time-harmonic fluctuation. A suitably defined Reynolds number is assumed to be large throughout. At large streamwise distances from the orifice, the time-averaged flow yields the classical, Bickley, jet with a suitable virtual origin. This decays algebraically whilst, by contrast, the unsteady component decays exponentially with streamwise distance. An asymptotic theory confirms the exponential decay and provides a good agreement with the numerical solution.
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期刊
IF:
3.9
论文数:
2.0W
被引数:
9.4W
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