4.7 Article

Effect of N2 dilution on combustion instabilities and emissions in biogas flame

Related references

Note: Only part of the references are listed.
Article Thermodynamics

Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures

Xing Li et al.

Summary: The experimental study compared the combustion characteristics of CH4/CO2 and CH4/N-2 non-premixed jet flames, showing that CO2 dilution leads to higher lift-off heights and lower blowout limits in turbulent flames. Additionally, elevated air temperature significantly increases the range of stable lifted flames. Pre-mixed flame models were used to analyze liftoff heights and blowout velocities, revealing a linear relationship between non-dimensional liftoff height and fuel jet velocity, as well as between non-dimensional blowout velocity and Reynolds number.

ENERGY (2021)

Article Energy & Fuels

Effects of N2 dilution on laminar burning velocity, combustion characteristics and NOx emissions of rich CH4-air premixed flames

Huaqiang Chu et al.

Summary: Experimental and numerical results showed that as the equivalence ratio increased, the laminar burning velocity, intermediate radicals, and NOx emissions exhibited a trend of increasing first and then decreasing. Under the same equivalence ratio, increasing the N-2 doping ratio resulted in a decrease in the mole fraction of intermediate radicals and NOx.
Article Chemistry, Physical

Effect of ignition position and inert gas on hydrogen/air explosions

Wen Yang et al.

Summary: The study analyzed the effects of inert gas and ignition position on flame dynamics in a half-open duct with an aspect-ratio of 10, showing that flame propagation is dominated by different stability mechanisms at different ignition positions. Flame stability has a significant impact on the sensitivity of explosion parameters, and chemical kinetic calculations help clarify flame stability.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Energy & Fuels

Experimental investigation of the emission behaviour and flame stability of the oxygen and hydrogen enriched methane under acoustic enforcement

Bugrahan Alabas et al.

Summary: This study investigates the instability changes of oxygen-enriched fuel mixtures under acoustic enforcement in a premixed and swirl supported system. Experimental results show that increasing oxygen enrichment up to 24% ratio can increase stability by enhancing the laminar flame speed, but stability decreases at 26% oxygen content in the oxidizer. Additionally, the addition of oxygen increases NOx emissions due to higher adiabatic temperature, while reducing CO emissions.
Article Chemistry, Multidisciplinary

Effects of CO2 and N2 Dilution on the Combustion Characteristics of H2/CO Mixture in a Turbulent, Partially Premixed Burner

Yu Liu et al.

Summary: In this study, the effects of CO2 dilution, N-2 dilution, and CO2/N-2 dilution on the combustion characteristics of a turbulent, partially premixed CO/H-2-air flame were investigated. It was found that CO2 dilution results in longer flame length and larger main chemical reaction zone compared to N-2 dilution. Additionally, CO concentrations in CO2 diluted flames are higher than in CO/H-2 flames, and infinitively points confirm that CO2 dilution leads to lower intensities and rates of chemical reactions than N-2 dilution.

ACS OMEGA (2021)

Article Chemistry, Physical

Analysis of the effect of H2O content on combustion behaviours of a biogas fuel

Murat Sahin et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2020)

Article Thermodynamics

Experimental study of radiative heat transfer from laminar non-premixed methane flames diluted with CO2 and N2

I. M. Machado et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

Article Chemistry, Physical

Experimental study on flame stability of biogas / hydrogen combustion

Zhunqing Hu et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Article Energy & Fuels

3D numerical modelling of turbulent biogas combustion in a newly generated 10 KW burner

Mustafa Ilbas et al.

JOURNAL OF THE ENERGY INSTITUTE (2018)

Article Green & Sustainable Science & Technology

Experimental investigation on emission and stability of dual feed biogas swirl combustor

Marija Zivkovic et al.

JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY (2016)

Article Thermodynamics

First and second thermodynamic-law comparison of biogas MILD oxy-fuel combustion moderated by CO2 or H2O

Yaming Liu et al.

ENERGY CONVERSION AND MANAGEMENT (2015)

Article Thermodynamics

On the stability of a turbulent non-premixed biogas flame: Effect of low swirl strength

Meghdad Saediamiri et al.

COMBUSTION AND FLAME (2014)

Article Engineering, Mechanical

ANALYSIS OF RECIRCULATION ZONE AND IGNITION POSITION OF NON-PREMIXED BLUFF-BODY FOR BIOGAS MILD COMBUSTION

M. M. Noor et al.

INTERNATIONAL JOURNAL OF AUTOMOTIVE AND MECHANICAL ENGINEERING (2013)

Article Thermodynamics

Impact of CO2, N2 or Ar diluted in air on the length and lifting behavior of a laminar diffusion flame

Jiesheng Min et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2011)

Article Chemistry, Physical

The effect of hydrogen addition on biogas non-premixed jet flame stability in a co-flowing air stream

T. Leung et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2008)