Jet penetration and interaction at a sonic throat.
Frick, Kenneth Edwin.
Nunn, Robert H.
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This thesis describes the results of an investigation of the throttling effects of a transverse jet when injected into a sonic throat. The process, commonly referred to as aerodynamic throttling, was studied both analytically and experimentally. An analytical model is developed utilizing momentum considerations. This model successfully predicts the measured throttling results for 90° injection and mainstream flow reductions up to approximately 60 percent. The agreement between theory and experiment becomes less satisfactory as the upstream angle of injection is increased and at extremely high throttling conditions. An experimental program is described in which a two-dimensional nitrogen jet is injected into the mainstream through slots of various widths and inclinations. Visual flow patterns are shown to qualitatively describe the nature of the interaction between the jet and the mainstream.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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