Affiliation:
1. Taizhou Vocational College of Science & Technology, Taizhou, China P.R.
2. Vehicle Engineering Center-CAE Technology Development, Geely Automobile Research Institute, Ningbo, China P.R.
3. College of Energy Engineering, Zhejiang University, Hangzhou, China P.R.
Abstract
Adding methane to methanol can solve the problem of difficult cold starts of
methanol engines. Therefore, it is important to understand the combustion of
methane and methanol fuel blends. Because of this, this study explores the
effect of methane addition on the laminar burning velocity and Markstein
length of methanol/methane premixed flames under stoichiometric conditions
at the initial temperatures of 353 K, 373 K, and 393 K, initial pressures of
1 bar, 2 bar, and 4 bar, using methane addition ratios of 0%, 25%, 50%, 75%
and 100% in a constant volume combustion chamber. The results show that the
laminar burning velocity decreases linearly with the increase of methane
addition ratio due to the linear decrease of the Arrhenius factor. The
sensitivity analysis revealed that the kinetic effect is the main reason for
the inhibition of laminar burning velocity, which is insensitive to initial
temperature but enhanced at a high initial pressure. The Markstein length
decreases with the addition of methane and the increase of initial pressure,
which is mainly caused by the high mass diffusivity of methane and the
decrease of flame thickness due to the increase of initial pressure.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment