scholarly journals NUMERICAL RESEARCHING THE COMBUSTION AND HEAT TRANSFER WHILE HAYDITE BURNING IN A ROTARY KILN

2016 ◽  
Vol 2 (1) ◽  
pp. 170-174
Author(s):  
Кузнецов ◽  
Valeriy Kuznetsov
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Natural Gas ◽  
Rotary Kiln ◽  
Diffusion Flame ◽  
Gas Combustion ◽  
Thermal Operation ◽  
Natural Gas Combustion

A mathematical model has been elaborated and a computer simulating program has been made up with the help of which a numerical researches were fulfilled for natural-gas combustion and the heat transfer in a rotary kiln while haydite burning. Its thermal operation was considered to find the best conditions of heat transfer from the diffusion flame to expanding calcined granules.

Single Pellet Heating in Natural Gas Combustion Products in Mixture with Air and Oxygen

2020 ◽  
Vol 989 ◽  
pp. 480-485
Author(s):  
German V. Voronov ◽  
Il'ya V. Glukhov
Keyword(s):  
Heat Transfer ◽  
Natural Gas ◽  
Radiant Heat ◽  
Combustion Products ◽  
Physical Parameters ◽  
Radiant Heat Transfer ◽  
Gas Combustion ◽  
Single Pellet ◽  
Natural Gas Combustion ◽  
Pellet Heating

Single pellet heating was considered at natural gas combustion product movement with oxidant flow coefficient of α=1.0 with air and oxygen in unconstrained volume. Physical parameters (density, dynamic and kinematic viscosity) and heat transfer properties (temperature, heat capacity, thermal conductivity, thermal diffusivity) of combustion products correspond to the average composition of gas delivered to the Ural region. Iron-ore pellet average properties were evaluated, based on major pellet plant data. Convection and radiant heat transfer coefficients were determined at pellet heating in natural gas combustion products in a mixture with air and oxygen. It was noted that, at switching to gas burning with oxygen radiant heat transfer to the pellet surface increases significantly, as compared to the convection one.

scholarly journals Optimization of natural gas combustion in furnace of steam boilers

2020 ◽  
Vol 216 ◽  
pp. 01155
Author(s):  
Murot Tulyaganov
Keyword(s):  
Mathematical Model ◽  
Natural Gas ◽  
Electric Drive ◽  
Combustion Process ◽  
Combustion Control ◽  
Gas Combustion ◽  
Asynchronous Electric Drive ◽  
Steam Boilers ◽  
Natural Gas Combustion

The issues of natural gas combustion control in the furnace based on the compile mathematical model to optimize the combustion process using a frequency-controlled asynchronous electric drive of blow fans are considered in this article.

Research of pressure influence in the gas supply system on the energy consuption level of gas devices

2019 ◽  
Vol 6 (2) ◽  
pp. 56-63
Author(s):  
L. D. Pylypiv ◽  
І. І. Maslanych
Keyword(s):  
Natural Gas ◽  
Residential Buildings ◽  
Supply System ◽  
Normal Operation ◽  
Gas Combustion ◽  
Efficient Operation ◽  
Gas Consumption ◽  
Natural Gas Combustion ◽  
Gas Supply

There are investigated the influence of operating pressures in the gas supply system on the level of such energy indicators as efficiency, gas flow and gas overrun by gas equipment in residential buildings. There is established a relationship between the values of operating pressures in the gas supply system and the gas consumption level of household appliances. The causes of insufficient pressure in the gas networks of settlements are analyzed in the article. There is also developed an algorithm for calculating the change in the efficiency of gas appliances depending on the operational parameters of the gas network. It has been found that the most efficient operation of gas appliances is observed at an overpressure at the inlet of gas appliances of about 1200 Pa.To ensure the required quality of natural gas combustion among consumers and minimize gas consumption there are justified the following measures in the article: coordinating a domestic regulatory framework for assessing the quality of natural gas with international norms and standards; improving the preparation of gas coming from local wells before supplying it to gas distribution networks; auditing low pressure gas pipelines and reconstructing areas affected by corrosion; ensuring standard gas pressure in the network for the normal operation of domestic gas appliances; stating quality indicators of natural gas combustion by gas sales organizations.

Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion

2002 ◽  
Vol 125 (1) ◽  
pp. 40-45 ◽  
Author(s):  
K. P. Vanoverberghe ◽  
E. V. Van den Bulck ◽  
M. J. Tummers ◽  
W. A. Hu¨bner
Keyword(s):  
Natural Gas ◽  
Combustion Chamber ◽  
Gas Flow ◽  
State Transition ◽  
Gas Combustion ◽  
Bifurcation Phenomena ◽  
Major Species ◽  
Partially Premixed ◽  
Natural Gas Combustion ◽  
Low Nox Emission

Five different flame states are identified in a compact combustion chamber that is fired by a 30 kW swirl-stabilized partially premixed natural gas burner working at atmospheric pressure. These flame states include a nozzle-attached tulip shaped flame, a nonattached torroidal-ring shaped flame (SSF) suitable for very low NOx emission in a gas turbine combustor and a Coanda flame (CSF) that clings to the bottom wall of the combustion chamber. Flame state transition is generated by changing the swirl number and by premixing the combustion air with 70% of the natural gas flow. The flame state transition pathways reveal strong hysteresis and bifurcation phenomena. The paper also presents major species concentrations, temperature and velocity profiles of the lifted flame state and the Coanda flame and discusses the mechanisms of flame transition and stabilization.

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