Aleksandr A. FIRSOV, Luka S. VOLKOV, Yakov V. Miroshnikov

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST2024-00194

When a supersonic air flow interacts with a transverse secondary jet injected into this flow through an
orifice on a flat wall, a special flow structure is formed. This kind of flow has set of technical
applications related to fuel combustion; therefore, various approaches to intensifying gas mixing in
this type of flow are proposed and studied. This work is devoted to the approach which implies using
electric discharges for pulsed heating of the medium and generating the instabilities in the shear layer
at the boundary of the secondary jet. In the software package FlowVision the characteristics of the
flow are simulated in the absence and presence of pulsed-periodic local heating on the injector
windward side. The calculations are performed for three jet-to-crossflow momentum flux ratios: 0.7,
1.0 and 1.3. Six modes of pulse heating are investigated: they have different frequencies of pulsed
heating (from 10 to 60 kHz), but they have the uniform average power release. This work
demonstrates that pulsed heating can stimulate the formation of perturbations in the shear layer at
the jet boundary and can lead both to a decrease in the average mixing efficiency and to its increase
(up to 15%). The optimal frequencies of the pulsed heating are found.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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