Estimation of NOx and soot emission from a constant volume n-butanol/n-dodecane blended spray using unsteady flamelet model based on n-dodecane/n-butanol/NOx/PAH chemistry
Wakale, Anil Bhurao and Banerjee, S. and Banerjee, Raja (2020) Estimation of NOx and soot emission from a constant volume n-butanol/n-dodecane blended spray using unsteady flamelet model based on n-dodecane/n-butanol/NOx/PAH chemistry. Journal of the Energy Institute, 93 (5). pp. 1868-1882. ISSN 17439671
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A 246 species and 1062 reactions containing skeletal n-dodecane/n-butanol/NOx/Polycyclic Aromatic Hydrocarbon (PAH) combustion mechanism (Mix246) was developed for n-dodecane/n-butanol blend combustion under diesel engine-like conditions. The Mix246 mechanism was validated using ignition delay and species concentration profile data from various n-dodecane and n-butanol combustion experiments as well as by comparisons with predictions from the parent mechanisms. Subsequently, the Mix246 mechanism was coupled with a 3D Computational Fluid Dynamic (CFD) solver to simulate turbulent combustion of n-butanol/n-dodecane blended sprays in a constant volume combustor using an unsteady flamelet model. The CFD model for the 100% n-dodecane case was benchmarked against the non-reacting and reacting Spray-A conditions of the Engine Combustion Network (ECN). Finally, a parametric study was conducted to investigate the effects of various diesel engine-like conditions such as fuel injection pressure, initial ambient pressure and temperature conditions and varying n-butanol/n-dodecane blend ratios on NOx and soot emissions. Simulations show that the turbulent spray combustion evolves through distinct temporal stages and that the fully developed flame have spatially separated zones of reactive physics. Combustion properties and emission profiles for pure n-dodecane and blends with up to 20% n-butanol were seen to be nearly identical suggesting that n-butanol is a suitable alternative biofuel for CI engine combustion.
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| Item Type: | Article | ||||
| Uncontrolled Keywords: | Combustion chemical kinetics,n-Butanol/n-dodecane blends,NOx and soot emissions,Turbulent diffusion combustion modelling, Unsteady flamelet model | ||||
| Subjects: | Physics > Mechanical and aerospace > Transportation Science & Technology Physics > Pneumatics Physics > Sound, light and Heat Physics > Magnetism Physics > Modern physics |
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| Divisions: | Department of Mechanical & Aerospace Engineering | ||||
| Depositing User: | . LibTrainee 2021 | ||||
| Date Deposited: | 28 May 2021 05:09 | ||||
| Last Modified: | 28 May 2021 05:09 | ||||
| URI: | http://raiithold.iith.ac.in/id/eprint/7857 | ||||
| Publisher URL: | http://doi.org/10.1016/j.joei.2020.04.002 | ||||
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