Correction to Experimental Measurement of Laminar Burning Velocity and Flammability Limits of Landfill Gas at Atmospheric and Elevated Pressures

In the proposed paper for this conference, three typical mixtures of H2, CO, CH4, CO2 and N2 have been considered as representative of the producer gas (syngas) resulting from biomass gasification. Syngas is being recognized worldwide as a viable energy source, particularly for stationary power generation. However, there are gaps in the fundamental understanding of syngas combustion characteristics, particularly at elevated pressures that are relevant to practical combustors. In this work, constant volume spherical expanding flames of three typical syngas compositions have been employed to measure the laminar burning velocity for pressures ranges between 1.0 and 20 bar. Over the ranges studied, the burning velocities are fitted by the functional formula of Metghalchi and Keck. Conclusion can be drawn that the burning velocity decreases with the increase of pressure. In opposite, the increase of temperature induces the increase of burning velocity. The higher burning velocity value is obtained for the downdraft syngas. This result is endorsed to the higher heat value, lower dilution and higher volume percentage of hydrogen in the downdraft syngas.

Download Full-text

Measurements of laminar burning velocity and Markstein length in outwardly-propagating spherical SNG-air premixed flames at elevated pressures

Fuel ◽

10.1016/j.fuel.2020.117952 ◽

2020 ◽

Vol 275 ◽

pp. 117952

Author(s):

Jun Ho Song ◽

Seo Hee Cho ◽

Kee Man Lee ◽

Jeong Park

Keyword(s):

Burning Velocity ◽

Premixed Flames ◽

Laminar Burning Velocity ◽

Markstein Length ◽

Elevated Pressures

Download Full-text

Experimental and Computational Determination of LBV of Hydrogen Enriched Methane Mixtures

SAMRIDDHI A Journal of Physical Sciences Engineering and Technology ◽

10.18090/samriddhi.v5i1.1518 ◽

2015 ◽

Vol 5 (1) ◽

Author(s):

Vinod Kumar Yadav ◽

Ranjeet Singha ◽

Abhishek Kumar Pandey ◽

Saumya ◽

Ashish Kumar Singh ◽

...

Keyword(s):

Coming Out ◽

Burning Velocity ◽

Laminar Burning Velocity ◽

Flammability Limits ◽

Ambient Temperatures ◽

Gaseous Fuels ◽

Wide Range ◽

Hydrogen Enrichment ◽

Institute Of Technology ◽

Set Up

One of the major causes of environmental pollution and ozone layer depletion is the emissions coming out of the combustion devices including industrial burners, automobile vehicles and household appliances. Most of the conventional fuels used now days have high GWP and ODP. So the greatest challenges among the combustion researchers and scientists are to develop some sustainable and non conventional sources of energy that possesses capability to replace the conventional ones. One of the important gaseous fuels in non conventional category is hydrogen, which is a cleaner fuel and reduces pollution enormously. In the present work, experimental & computational analysis of laminar burning velocity (LBV) of premixed gaseous fuels (primary focus on Hydrogen enrichment) was carried out. For experimental investigation the experimental set up available in Fuel and pollution lab of Indian Institute of Technology Delhi is used. Experiments were carried out on mixtures of methane- Air and Methane-Hydrogen-Air for wide range of equivalence ratios and compared with the computational results of PREMIX with full GRI-Mech 3.0 mechanism. Most of the experiments available in literature were carried out at 298 K. In the present work it has been tried to relate the effect of low temperatures on laminar burning velocity of mixtures. The experiments have been conducted at 1 bar pressure and around 292 Kelvin with equivalence ratio ranging from 0.8 to 1.2. Methane gas is enriched with hydrogen in varying proportions and the effect of hydrogen enrichment on its laminar burning velocity studied. The objective of the addition of hydrogen to methane was to increase its laminar burning velocity as well as to extend its lean flammability limits at lower ambient temperatures.

Download Full-text