THEORETICAL DESCRIPTION OF THE PROCESS OF HEATING THE GAS-AIR MIXTURE IN THE BODY OF THE BURNER WITH A THERMAL DIVIDER

The main thermal processes occurring during the operation of a gas burner device for household use are considered. One of the important functions performed by the gas burner device is the preparation of fuel for subsequent combustion. The efficiency and quality of the combustion process directly depends on the temperature of the gas-air mixture. Since an increase in the temperature of the mixture contributes to the intensification of the combustion process, when designing gas burner devices, it is useful to determine the temperature of the gas-air mixture inside the burner body. We have proposed a solution that makes it possible to increase the efficiency of the gas burner device by intensifying the preheating from the thermal divider to the gas-air mixture inside the body of the gas burner. It has been established that the placement of the thermal divider in the central part on the inner side of the cover allows one to reduce the stagnant zone area when the flow of the gas-air mixture moves, and the conical shape of the thermal divider provides minimal resistance to the movement of the gas-air mixture flow inside the gas burner, in addition, the side surface of the thermal divider additionally increases the area heat transfer. An expression is obtained for calculating the average temperature of the gas-air mixture at the outlet from the firing holes of the gas burner.

Procedure for Simulation of Combustion in the Burner Device of the Low-Emission Combustion Chamber

This article discusses the problems of gas dynamic processes modeling in the design of burner devices of low-emission combustion chambers of gas turbine engines. Characteristic features of existing physical and mathematical combustion models, turbulence and radiant heat exchange are analyzed. The necessity of developing a technique that allows developing a final model based on existing physical and mathematical models of turbulence, combustion, radiant heat exchange, and chemical kinetics mechanisms, that accurately reflects gas dynamic processes in burner device of low-emission combustion chamber and allows performing practical calculations with a given accuracy, is identified and justified.To achieve this goal, the authors suggest the following:- to conduct filed tests of the burner device under study;- to perform three-dimensional gas dynamic calculations of the burner device under study using the most used models of turbulence, combustion and radiation;- based on the results of calculations and field tests, to perform validation and select the most appropriate models for the formation of the final physical and mathematical model of the burner device under study;- using the final physical and mathematical model to solve a practical problem in order to test the developed simulation procedure.

Experimental test of Water-Oil Emulsion Combustion

This report dwells on the scientific study of the vortical device. The device is designed for efficient combustion of fossil fuels. Oil-water emulsion was taken as an example of alternative fuel. Although the functionality of the burner device is not limited to this fuel only. The innovative burner device under investigation is based on principal of vortical motion of fuel air mixture. There is a precombustion chamber specially designed, where inflammation and partial combustion of the swirling flow takes place. The article describes experiment on defining the geometric dimensioning of the burner discharge nozzle in relation to a combustion chamber. The position of the outlet nozzle inside of the burner is the main input parameter of this research. The authors analyzed the influence of this parameter on the pressure inside the combustion chamber and the electric load of the fan for the supplying combustion air. The position ranged from 0 to 120%. The optimal position is at 50% of the total length of the burner chamber. The pressure graph has an extremum in this position, and the electric energy consumption by the fan changes less significantly with further deepening of the output nozzle than earlier. The Results are presented for cold (air blowing only) and hot experiment (burning). This experiment proved the need for the design of the inner part of the discharge nozzle, which is a design feature of the burner device for which the European patent was obtained. The patent link is presented in the list of references.

Development of a New Burner Device Based on Injection-Radiation Method for Gas Fuel Combustion

This paper presents the results of designing a promising burner device that combines injection and radiation methods for gaseous fuel combustion. Infrared radiation from the heated surface of nozzle of radiation burner provides intensive heat transfer in furnaces and boilers, specifies their high efficiency at low flue gas temperatures, and very low NOx emissions. Effective gas combustion is facilitated by additional heating of the initial fuel mixture during filtration through the hot walls of porous nozzle. The new design of radiation burner has high performance characteristics, provides effective combustion of gaseous fuel up to 99% and meets high environmental standards and requirements.