Computational fluid dynamic (CFD) simulations of hydrogen injection through a multi-porthole injector array into a Mach 10 enthalpy supersonic crossflow are presented and compared to experimental data. Reynolds-averaged Navier–Stokes simulations using a Menter shear-stress transport turbulence model are performed with the CFD code CFD++. The experimental results showed transient flow behavior in the boundary-layer separation upstream of the injector past the measurable test time. This complicated the validation process of the steady-state simulations to the experimental data. A hybrid simulation, which provides a laminar inflow boundary layer and turbulence production at the injector, matched the upstream separation length as measured from the experimental data. The simulation near-field shock structures and fuel penetration matched experimental schlieren photographs. The close jet-to-jet spacing leads to a blockage of injector-generated vortices. The simulations show that including three-dimensional spillage effects reduced the injection-induced separation length by 20%, and they resulted in a better match with the experimental data. The results also showed the injection-induced separation has a significant spanwise flow and alters the mixing process downstream of the multi-porthole injector array by enabling trailoff vortices to develop.
Analysis of a Multi-Porthole Injector Array in a Supersonic Crossflow
Journal of Propulsion and Power ; 36 , 4 ; 560-574
2020-04-15
15 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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