The investigation of fuel delivery mechanisms is a critical design point in the development of supersonic combustion ramjet (scramjet) technology. Primary challenges include proper penetration of the jet in the supersonic cross-flow while keeping total pressure losses and wall drag to a minimum. To reduce drag and heat loads especially at high burner entry Mach numbers it is desirable to use a non-intrusive means of fuel delivery. It has been shown in incompressible studies that excited jets increase penetration into crossflows. Several papers have demonstrated that excited jets increase penetration in supersonic crossflows in comparison to steady jets. This paper presents a cold-flow, 3-D numerical model using ANSYS FLUENT 15.0 has shown that the penetration of a hydrogen jet into a supersonic air stream is increased when pulsing the sonic jet in the kilohertz range of frequencies. Further experimental validation of this work is planned within a Mach 2.3 blow down facility at UTSI (currently under development) which will use a kHz range siren to produce the pulsation jet.
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