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Investigation of Behaviour of Jet Shear Layer in Tandem Dual Jet Injection in Supersonic Crossflow using Schlieren Images

Smink, J.S. (2020) Investigation of Behaviour of Jet Shear Layer in Tandem Dual Jet Injection in Supersonic Crossflow using Schlieren Images.

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Abstract:In aviation, jet engines are often used for propulsion. For flight velocities from Mach 5 and up, scramjets are used. For the efficiency of the combustion and minimisation of the length of the scram jet engine, it is important that fuel is mixed rapidly with the air flow. For the mixing, fuel is transversely injected in the supersonic crossflow. Tandem dual jet injection has been proven to be more efficient in mixing than single jet injection. In analysing transverse jet injection, a number of phenomena become apparent. In front of each injection point, a bow shock arises. Downstream of the bow shock, the jet penetrates the supersonic crossflow and mixes with the flow passing through the bow shock. The upper boundary of the mixing area is determined by the (time-dependent) position of the jet shear layer at the upper side of the jet plume. These phenomena are observed in several studies for injection in supersonic flow but, have not been fully characterized yet for tandem dual jet injection. Therefore, in this research, the behaviour of the jet shear layer in tandem sonic jet injection in a supersonic crossflow has been investigated in detail.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/85915
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