Abstract
A basic experimental study of the cone uence of two turbulent supersonic e ows has been carried out in a Mach 2 research wind tunnel. The aim of this investigation was to reach a better understanding of the e uid dynamics mechanismsinvolvedinatypicalpoweredafterbodycone gurationwhenanunderexpandednozzlejetinteractswith an external e owe eld. The experimental techniques used to investigate this e ow were wall pressure measurements, schlieren photography, and two-component laser Doppler velocimetry. The mean and e uctuating properties of the e owe eld were measured around a jet-on axisymmetric afterbody model. In particular, the results illustrate the effectofthejet-to-external stagnationpressureratio andgiveinformationontheturbulente eld.Theseexperiments compensateforthelackofpublisheddetailedmeasurementsinsuche owe eldpatternsandprovidewell-documented test cases to validate computer codes.
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