A Model Study of the Effect of Jet and Exhaust Flow on Drag of the Torpedo Test Vehicle MK 40 X-1

Abstract

Experimental investigations of the effects of jets and exhaust on a model of the TTV Mk 40 X-1 are discussed. Photographs of the model jet and exhaust flow patterns are presented. Model pressure distribution data and afterbody drag coefficients are shown for numerous flow conditions. Many correlations among the observed phenomena are discussed. Several estimates of prototype jet- and exhaust-induced drag forces are presented. The susceptibility of the configuration to cavitation is discussed. Detailed analyses of the model results as they pertain to the prototype external flow phenomena are presented. Possible fields of study are suggested which could lead to improved prototype performance characteristics.

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