A parametric study of microjet assisted methane/air turbulent flames

Chouaieb, Sirine; Kriaa, Wassim; Mhiri, Hatem; Bournot, Philippe

doi:10.1016/j.enconman.2017.02.079

Cited by 12 publications

(12 citation statements)

References 32 publications

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“…Increasing the combustion efficiency and reducing emissions are the goals being pursued by researchers. With the advancement of technology, more and more advanced combustion technologies have been proposed, such as flameless combustion, , low temperature combustion, , hydrogen enriched combustion, , and microjet assisted flames, − etc. Air microjet is defined as air injection from a small diameter nozzle .…”

Section: Introductionmentioning

confidence: 99%

“…With the advancement of technology, more and more advanced combustion technologies have been proposed, such as flameless combustion, , low temperature combustion, , hydrogen enriched combustion, , and microjet assisted flames, − etc. Air microjet is defined as air injection from a small diameter nozzle . The microjet structure was first tested by Ganguly et al and Sinha et al in coaxial nonpremixed flames.…”

Section: Introductionmentioning

confidence: 99%

“…The judicious microjet velocity was beneficial to combustion without an emissions penalty. After that, the microjet was introduced to the Brookes and Moss configuration by Chouaieb et al , The numerical results presented that an inner flame was generated because of the microjet. The increase of hydrogen percentage of the CH 4 –H 2 mixture, resulted in mixing enhancement and lower soot emission.…”

Section: Introductionmentioning

confidence: 99%

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Combustion Characteristics of Bluff-Body Turbulent Swirling Flames with Coaxial Air Microjet

et al. 2017

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The interaction between the coaxial air microjet structure and the swirling flow is investigated numerically based on the nonpremixed bluff-body stabilized swirling SM1 flame. The effects of microjet velocity and swirl number on flame combustion characteristics are analyzed. The modified standard k–ε model and the realizable k–ε model are considered for the turbulent model using FLUENT software. The flamelet model is used with the GRI 2.11 detailed kinetic mechanism. In addition, the discrete ordinate model and the weighted-sum-of-gray-gases model are used together to deal with the radiative heat transfer in the combustion process. Results of the modified standard k–ε model are in better agreement with the experimental data than the realizable k–ε model. Results show that the inner flame generates due to the existence of a microjet configuration. High microjet velocity (such as 50 m/s) can reduce the soot formation and keep the inner flame high temperature region away from the microjet nozzle. The structure of the inner flame depends on the microjet velocity and is independent of the swirl number. Swirl number increases from 0.3 to 0.6, the primary peak temperature is enhanced by 48 K, and the peak soot volume fraction is increased by 49% along the axis centerline.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combustion Characteristics of Bluff-Body Turbulent Swirling Flames with Coaxial Air Microjet

et al. 2017

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“…Örneğin, Chouaieb vd. [2] tarafından yapılan bir çalışmada, ön-karışımsız bir metan alevi mikrojet desteği ile sayısal olarak yakılmış ve yanma sonu parametreleri araştırılmıştır. Bahsi geçen çalışmada mikrojet olarak hava kullanılmıştır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Bu çalışmada, yanma sonu ürünlerinden olan NOX kirletici emisyonunun azaltılması için bu seyrelticilerin etkilerinin araştırılması amaçlanmıştır. CO2, N2 ve su buharı, literatürde yapılan bir çalışmada [2] kullanılan yanma odasına benzer bir yanma odası için mikrojet şeklinde yanma odasına beslenmiş ve bu seyrelticilerin yanma sonu NOX emisyonlarına olan etkileri sayısal olarak araştırılmıştır. 3.…”

Section: Gi̇ri̇ş (Introduction)unclassified