Abstract

By setting clear targets for reducing pollutant emissions, the researchers in the field of combustion are pushed lately to find new alternatives for cleaner combustion. The partial or total transition to other types of fuels, such as hydrogen, involves substantial changes in the combustion process and possible necessary constructive changes. In the study of the combustion of CH4-H2mixtures, both numerically and experimentally, preliminary calculations are required, which will help to easily establish the parameters and working regimes and then to use for verifying the results. This paper aims to find an easier method of calculating these parameters, depending on the percentage of gas in the fuel mixture. The calculated values resulted this way will lead to some logical estimates of important aspects of combustion, such as flame field and temperature variation, related to the variation of the amount of hydrogen in the mixture. The method can be a useful tool in the preliminary design of a combustion chamber for CH4-H2mixtures.

Highlights

  • Starting from the environmental problems form the past decades, the scientific world is lately in a constant search for less pollutant and more efficient fuels

  • From wind or solar energy, hydrogen can be produced on site by electrolysis and can be transported with the existing natural gas distribution network and used for different existing or new applications

  • The acquired formulas can be used for obtaining useful values that can be used both as starting data and for verifying the experimental measured results

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Summary

Introduction

Starting from the environmental problems form the past decades, the scientific world is lately in a constant search for less pollutant and more efficient fuels. The new resulting gas, as a mixture of hydrogen and natural gas, depending on the proportions, can change significantly the combustion parameters of the final application, due to the different mixtures properties From this perspective, numerical and experimental investigations are needed. For both numerical simulations and experimental sessions, the preliminary calculations of the input values and nominal regimes are needed. In order to find the main operating parameters of the combustion, formulas and calculations are usually required, based on theory and literature These calculations and the preliminary results obtained can be later used to define the input and output parameters in the numerical simulations and to establish the operating regimes, air and fuel flows, temperatures, pressures and stability limits in the experiments. The acquired formulas can be used for obtaining useful values that can be used both as starting data and for verifying the experimental measured results

Excess air - mixture ratio - gas analysis
Combustion of CH4
Combustion of H2
Adiabatic temperature - mixture ratio
Findings
Conclusions
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