NOTE ON REFLECTION AND TRANSMISSION COEFFICIENTS FOR CONVERGING-DIVERGING DUCTS.

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作者：
Durbin, Paul A.
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来源：
NASA Technical Memorandum | 1981年
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DUCTS;
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摘要：
Simple formulas for calculating reflection and transmission coefficients for converging-diverging ducts are derived; they extend the method of Cho and Ingard to arbitrary, slowly varying ducts. These formulas involve two parameters: the first is a function of duct shape, and the second is the ratio of the duct radius downstream of the throat to that upstream of the throat. An extension of the method to include mean flow is made for symmetric ducts.
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