Preliminary communication
Numerical Analyses of Combustion Methane-Hydrogen Mixtures in Cylinder for Different Spark Timing
Bilge CEPER
orcid.org/0000-0001-5556-5170
; Departmen of Mechanical Engineering, Erciyes University, Kayser, Turkey
Nafiz KAHRAMAN
; Departmen of Mechanical Engineering, Erciyes University, Kayser, Turkey
Selahaddin Orhan AKANSU
; Departmen of Mechanical Engineering, Erciyes University, Kayser, Turkey
Kadir AYDM
; Departmen of Mechanical Engineering, Çukurova University, Adana, Turkey
Abstract
In this study, numerical simulations of combustion characteristics using pure
methane and 70 % CH4-30 % H2 blends were investigated in a spark ignition
engine. The numerical calculations were performed using the finite volume CFD
code FLUENT with standard k-ε model using the compression ratio and the
engine speed are 10 and 2000 rpm respectively. Excess air ratios were selected as
1, 1.2 and 1.4. The spark timings were started at 45, 30 and 15 degree crank angle
(CA) before top dead center (BTDC). The results of the combustion process were
investigated as a function of crank angle. The maximum cylinder pressures and
temperatures were obtained with 70 % CH4-30 % H2 mixture. It is observed that
peak pressure values are decreased when the excess air ratio increased.
Keywords
Cylinder pressure; Excess air ratio; Methane-Hydrogen; Spark timing
Hrčak ID:
66568
URI
Publication date:
29.10.2010.
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