Browsing by Author "Umyshev D."

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    A NOVEL VORTEX COMBUSTION DEVICE Experiments and Numerical Simulations with Emphasis on the Combustion Process and NOx Emissions
    (2022-01-01) Dostiyarov A.; Hristov J.; Umyshev D.; Yamanbekova A.; Ozhikenova Z.
    Experimental and numerical studies of combustion process in a vortex flow device have been developed. The modelling part of the study has been performed by means of ANSYS Fluent package. Fuel droplet trajectories and the flow pattern on their motions have been modeled by the function “injection”. The combustion process utilized the k-ε turbulence model. A special trend on the effect of the vortex gener-ator blade orientation on the gross process has been developed. It has been estab-lished that optimal process performance (high air excess ratio and low NOx emis-sions) could be attained with an angle of the vortex generator blade orientation, especially with respect to the minimization of NOx emissions.
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    METALLIC PLATE HEATING BY A FLAT BURNER Experiments and CFD Simulations
    (2022-01-01) Dostiyarov A.; Umyshev D.; Duisenbek Z.; Hristov J.; Musayeva Z.
    Metal plate heating by new microflare burner has been studied experimentally and by CFD simulations, additionally, concentrations of NOx were measured to compare conventional and microflare burners. In addition, the article provides a numerical simulation of the combustion of a microflame burner. It has been demonstrated that microflare burners are more efficient and allows more uniform heating of metal plates. The comparison of NOx concentrations of conventional and microflare burners indicate better performance of the latter.