Sushant Pandurangi | Swiss Federal Institute of Technology (ETH) (original) (raw)
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Visvesvaraya Technological University
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Papers by Sushant Pandurangi
International Journal of Engine Research, 2016
SAE International Journal of Engines, 2016
SAE International Journal of Engines, 2016
The 4 th Workshop of the Engine Combustion Network (ECN) was held September 5-6, 2015 in Kyoto, J... more The 4 th Workshop of the Engine Combustion Network (ECN) was held September 5-6, 2015 in Kyoto, Japan. This manuscript presents a summary of the progress in experiments and modeling among ECN contributors leading to a better understanding of soot formation under the ECN " Spray A " configuration and some parametric variants. Relevant published and unpublished work from prior ECN workshops is reviewed. Experiments measuring soot particle size and morphology, soot volume fraction (f v), and transient soot mass have been conducted at various international institutions providing target data for improvements to computational models. Multiple modeling contributions using both the Reynolds Averaged Navier-Stokes (RANS) Equations approach and the Large-Eddy Simulation (LES) approach have been submitted. Among these, various chemical mechanisms, soot models, and turbulence-chemistry interaction (TCI) methodologies have been considered.
SAE Technical Paper Series, 2015
Atmospheric Environment, 2015
Traffic-related metal nanoparticle emissions can pose environmental and health concerns. Fe 3 O 4... more Traffic-related metal nanoparticle emissions can pose environmental and health concerns. Fe 3 O 4 nanoparticle agglomerates occur in diesel exhaust. Steel fragments detached from cylinder engine parts can melt in the combustion chamber. A hitherto neglected mechanism of metal nanoparticle formation from internal combustion engines is suggested. a b s t r a c t A wide range of environmental and health effects are linked to combustion-generated pollutants related to traffic. Nanoparticles, in particular, are a major concern for humans since they can be inhaled and have potentially toxic effects. The variability and sources of combustion-related nanoparticle pollutants remain inadequately investigated. Here we report the presence of ca. 5e100 nm large Fe 3 O 4 nanoparticles, in form of agglomerates, in diesel exhaust. The mode of occurrence of these nanoparticles, in combination with their chemical composition matching that of steel indicate that they derive by melting of engine fragments in the combustion chamber and subsequent crystallization during cooling. To evaluate this hypothesis, we applied CFD simulations of material transport in the cylinder of a diesel engine, assuming detachment of steel fragments from various sites of the cylinder. The CFD results show that fragments 20 mm in size dislodged from the piston surface or from the fuel nozzle interior can be indeed transported to such hot areas of the combustion chamber where they can melt. The simulation results concur with the experimental observations and point out that metal nanoparticle formation by in-cylinder melting of engine fragments can occur in diesel engines. The present study proposes a hitherto neglected formation mechanism of metal nanoparticle emissions from internal combustion engines raising possible environmental and health concerns, especially in urban areas.
SAE International Journal of Engines, 2014
Proceedings of the Combustion Institute, 2016
International Journal of Engine Research, 2016
SAE International Journal of Engines, 2016
SAE International Journal of Engines, 2016
The 4 th Workshop of the Engine Combustion Network (ECN) was held September 5-6, 2015 in Kyoto, J... more The 4 th Workshop of the Engine Combustion Network (ECN) was held September 5-6, 2015 in Kyoto, Japan. This manuscript presents a summary of the progress in experiments and modeling among ECN contributors leading to a better understanding of soot formation under the ECN " Spray A " configuration and some parametric variants. Relevant published and unpublished work from prior ECN workshops is reviewed. Experiments measuring soot particle size and morphology, soot volume fraction (f v), and transient soot mass have been conducted at various international institutions providing target data for improvements to computational models. Multiple modeling contributions using both the Reynolds Averaged Navier-Stokes (RANS) Equations approach and the Large-Eddy Simulation (LES) approach have been submitted. Among these, various chemical mechanisms, soot models, and turbulence-chemistry interaction (TCI) methodologies have been considered.
SAE Technical Paper Series, 2015
Atmospheric Environment, 2015
Traffic-related metal nanoparticle emissions can pose environmental and health concerns. Fe 3 O 4... more Traffic-related metal nanoparticle emissions can pose environmental and health concerns. Fe 3 O 4 nanoparticle agglomerates occur in diesel exhaust. Steel fragments detached from cylinder engine parts can melt in the combustion chamber. A hitherto neglected mechanism of metal nanoparticle formation from internal combustion engines is suggested. a b s t r a c t A wide range of environmental and health effects are linked to combustion-generated pollutants related to traffic. Nanoparticles, in particular, are a major concern for humans since they can be inhaled and have potentially toxic effects. The variability and sources of combustion-related nanoparticle pollutants remain inadequately investigated. Here we report the presence of ca. 5e100 nm large Fe 3 O 4 nanoparticles, in form of agglomerates, in diesel exhaust. The mode of occurrence of these nanoparticles, in combination with their chemical composition matching that of steel indicate that they derive by melting of engine fragments in the combustion chamber and subsequent crystallization during cooling. To evaluate this hypothesis, we applied CFD simulations of material transport in the cylinder of a diesel engine, assuming detachment of steel fragments from various sites of the cylinder. The CFD results show that fragments 20 mm in size dislodged from the piston surface or from the fuel nozzle interior can be indeed transported to such hot areas of the combustion chamber where they can melt. The simulation results concur with the experimental observations and point out that metal nanoparticle formation by in-cylinder melting of engine fragments can occur in diesel engines. The present study proposes a hitherto neglected formation mechanism of metal nanoparticle emissions from internal combustion engines raising possible environmental and health concerns, especially in urban areas.
SAE International Journal of Engines, 2014
Proceedings of the Combustion Institute, 2016