Temperature modes of the active combustion zone of microjet burners with multi-row fuel supply
DOI:
https://doi.org/10.31548/energiya2(84).2026.004Keywords:
microjet burners, temperature conditions, excess air coefficient, jet fuel supplAbstract
The research objective is to study temperature conditions in stabilizer-type burners with a three-row fuel supply system, designed for operation at excess air ratios of 1.1 to 1.5. The study was conducted using CFD modeling with the RANS (Reynolds Averaged Navier-Stokes) approach. The main principles of heat transfer in the microjet burners under consideration were analyzed. Particular attention was paid to the impact of the design and operating parameters of the burner system on various thermal characteristics. Results of CFD modeling of temperature fields in the active combustion zone were obtained when fuel gas was supplied to different rows of gas supply holes. The presented data from the computational studies indicate that the temperature fields differ significantly depending on the row number of the fuel gas supply hole. The results of computational experiments on the fields of root-mean-square temperature pulsations when fuel was supplied to different rows of gas supply holes are presented. Particular attention is paid to analyzing the thermal state of the recirculation zone behind the flame stabilizer. According to the data obtained, extreme temperatures in the recirculation zone occur for the three fuel supply situations considered. Patterns in the temperature non-uniformity coefficient variation along the channel length are examined. It is shown that the highest values of this coefficient are observed when fuel is supplied to the third section, and the lowest values are observed in the first section. A relatively sharp decrease in the temperature non-uniformity coefficient occurs in the zone located near the end of the stabilizer.
The data from these studies can be used in energy engineering practice for the design and modernization of burner devices operating with variable excess air coefficient values and variable thermal performance of heat and power equipment.
Recieved: 17.01.2026.
Recieved: 05.03.2026.
Accepted: 17.04.2026.
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