The usage of direct numerical simulations for research turbulent combustion space propulsion applications is explored. With this goal in mind, the near injection a fuel-rich methane–oxygen flame at 20 bar simulated using massively parallelized solver. statistical properties relevant physical fields are examined to study interactions between turbulence and combustion. This analysis complemented ...

This work presents an experimental study on the influence of pilot flame characteristics morphology and exhaust emissions a turbulent swirling flame. A reduced-scale burner, inspired by that fitted in AE-T100 micro gas turbine, was employed as platform to evaluate methane (CH4) ammonia-methane fuel blend with ammonia (NH3) volume fraction 0.7. The power ratio (PR) between main composition inves...

Normal-gravity experiments were conducted with inverse diffusion flames of small density difference with their surrounding ambient to study low Grashof number (Gr) flames that were several centimeters in diameter. The intensity of buoyancy was minimized by ejecting diluted air from a porous, spherical burner into a lower-density fuel atmosphere of hydrogen or hydrogen and methane at reduced pre...

Accidental flame initiation to propagation in pipes carrying flammable gases is a significant safety concern that can potentially result loss of life and substantial damage property. The understanding characteristics caused by methane–air mixtures within various extractive associated process industries such as coal mining critical developing effective safe fire prevention mitigation countermeas...

In this study, the thermochemical state during turbulent flame-wall interaction of a stoichiometric methane-air flame is investigated using fully resolved simulation with detailed chemistry. The side-wall quenching shows both head-on and quenching-like behavior that significantly affects CO formation in near-wall region. insights from are used to evaluate recently proposed (tip) vortex mechanis...

In this study, we show numerical predictions of the Zimont and Peter's turbulent flame speed models for low-swirl Methane/Air/Hydrogen flames [1]. These are contained as default options within ANSYS Fluent Premixed reaction model. Two distinct simulation tasks part present study – non-reacting reacting flows, with three different methane mixtures in compositions added 0, 40 60% hydrogen. The re...

porous media has interesting features in compared with free flame combustion due to the extended of the lean flammability limits and lower emissions. advanced new generation of internal combustion (ic) engines are expected to have far better emissions levels both gaseous and particulate matter, at the same time having far lower fuel consumption on a wide range of operating condition. these crit...

Abstract The present paper reports on the investigation of unsteady combustion a methane-air mixture, including at increased pressure in chamber and temperature mixture heating for model gas-turbine swirl burner based design by Turbomeca. To measure velocity OH fluorescence fields flows combination stereoscopic PIV acetone PLIF systems is used. In all cases, flow dynamics associated with moveme...

Flaring of waste gases is a common practice in the processing of hydrocarbon (HC) materials. It is assumed that flaring achieves complete combustion with relatively innocuous byproducts such as CO2 and H2O. However, flaring is rarely successful in the attainment of complete combustion, because entrainment of air into the region of combusting gases restricts flame sizes to less than optimum valu...