Experimental observations on the influence of hydrogen atoms diffusion on laminar and turbulent premixed burning velocities

Burluka, Alexey, Gaughan, R. G., Griffiths, J. F., Mandilas, C., Sheppard, C. G. and Woolley, R. (2017) Experimental observations on the influence of hydrogen atoms diffusion on laminar and turbulent premixed burning velocities. Fuel, 189. pp. 66-78. ISSN 0016-2361

[img]
Preview
Text
Experimental observations.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (1MB) | Preview
Official URL: http://dx.doi.org/10.1016/j.fuel.2016.10.088

Abstract

Measurements of the laminar and turbulent burning velocity of premixed hydrogen–air, n-hexane–air and n-octane–air flames were made and compared to corresponding measurements of deuterium–air, n-hexane-d14–air and n-octane-d18–air flames performed at identical initial conditions. Experiments were conducted in a constant volume, optically accessed vessel, at elevated initial pressure and temperature of 0.5 MPa and 360 K, for a range of equivalence ratios. Burn rate data was determined via schlieren imaging of flames. It was found that the isotope effect accounted for an average reduction of 20% in the laminar burn rate of alkanes. Similarly, deuterium was measured to burn around 30% slower than hydrogen at the range of equivalence ratios explored. The isotope effect on burn rate was significantly reduced under turbulence. The difference between the turbulent burn rates of the deuterated alkanes and their normal alkane counterparts were measured to be approximately 10%. The difference between the turbulent burn rates of deuterium and hydrogen was even smaller. Nonetheless, the laminar burn rate ranking was maintained under turbulence for all fuels and conditions explored, thus suggesting a degree of influence of radical transport and chemistry under turbulent burning.

Item Type: Article
Uncontrolled Keywords: Laminar flames, Turbulent flames, Burning velocity, Hydrogen combustion, Deuterium combustion, Isotope effect
Subjects: H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 18 Jun 2018 15:20
Last Modified: 09 Apr 2019 09:33
URI: http://nrl.northumbria.ac.uk/id/eprint/34600

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence