Suitability of Non-Reactive Flow Simulations in the Investigation of Mixing and Flameholding Capability of Supersonic Combustor Flameholder

Aryadutt Oamjee; Rajesh Sadanandan

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Suitability of Non-Reactive Flow Simulations in the Investigation of Mixing and Flameholding Capability of Supersonic Combustor Flameholder

机译：Suitability of Non-Reactive Flow Simulations in the Investigation of Mixing and Flameholding Capability of Supersonic Combustor Flameholder

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ABSTRACT A comparative study is performed to investigate the effectiveness of non-reactive supersonic flow simulations in qualitatively predicting the mixing performance and flameholding capability of a pylon-cavity aided, sonic fuel injection flameholder under, reactive flow conditions. The performance parameters such as mixing and combustion efficiencies, and flammable plume area are taken into account for the study. A non-reactive, steady-state RANS simulation is solved using coupled, implicit, second-order upwind solver with a two-equation SST κ-ω turbulence model. The numerical scheme is validated experimentally using steady wall pressure data and 2-D velocity vector field. Similar steady-state modeling has been performed for a reactive flow simulation with an 18 step Jachimowski reaction scheme for -air reactants. The study consists of two distinct injection locations on the cavity floor. Inlet Mach number of 2.2 is maintained for all the cases. The study shows that the cavity vortex pair with recirculating hot burned gases plays a decisive role in accurately predicting the flame location within the configuration. Though the non-reactive flow simulations are helpful in understanding the fundamental mechanisms also relevant under reactive flow conditions, like fuel-air mixing for example, it fails in the accurate prediction of the ignition location and flame stabilization.

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《Combustion science and technology》 |2022年第8期|1044-1061|共18页
作者
Aryadutt Oamjee; Rajesh Sadanandan;
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作者单位

Indian Institute of Space Science and Technology;

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正文语种英语
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Scramjet; reactive and non-reactive flows; mixing performance; PIV; CFD;

Suitability of Non-Reactive Flow Simulations in the Investigation of Mixing and Flameholding Capability of Supersonic Combustor Flameholder

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