Abstract:Computational predictions of transverse injection of air, helium, and ethylene into a Mach 1.98 crossflow of air are presented. A hybrid large-eddy simulation/Reynolds-averaged Navier-Stokes turbulence model is used. A blending function, dependent on modeled turbulence variables, is used to shift the turbulence closure from the Menter k-! model near solid surfaces to a Smagorinsky subgrid model in the outer part of the incoming boundary layer and in the jet mixing zone. The results show reasonably good agreeme… Show more
“…At first impression, hybrid RANS-LES methods seem to be a promising solution to this problem, and indeed they should be and are being explored. [78][79][80] However the interface region where RANS switches to LES, is one of the most significant challenges. In aerodynamic flows, hybrid RANS-LES has found success where the RANS regions are demarcated from the LES regions and some physical feature is responsible for the instabilities that generate and sustain turbulence in the LES regions.…”
Section: Les-based Methods For Combustor and Exhaust Systemmentioning
“…At first impression, hybrid RANS-LES methods seem to be a promising solution to this problem, and indeed they should be and are being explored. [78][79][80] However the interface region where RANS switches to LES, is one of the most significant challenges. In aerodynamic flows, hybrid RANS-LES has found success where the RANS regions are demarcated from the LES regions and some physical feature is responsible for the instabilities that generate and sustain turbulence in the LES regions.…”
Section: Les-based Methods For Combustor and Exhaust Systemmentioning
“…Surprisingly, as far as we know, there are not so much free jets simulations and the scarce ones mainly deal with moderately underexpanded jets [274][275][276][277][278]26]. This is particularly amazing since lots of these deal with such situations, and moreover we may find numerous studies dealing with impinging jets or jets in crossflows [279][280][281][282].…”
“…A considerable amount of work to perform LES/RANS analyses has also been conducted with other codes [111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129]. An interesting LES/RANS simulation of a supersonic coaxial jet experiment [130,131] was performed using the VULCAN code [110].…”
Section: Hyper-x and A New Generation Of High-speed Reacting Flomentioning
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