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Effect of swirl on the performance and combustion of a biogas fuelled spark ignition engine
, Porpatham E, Ramesh A, Nagalingam B.
Published in
2013
Volume: 76
   
Pages: 463 - 471
Abstract
The influence of swirl on the performance, emissions and combustion in a constant speed Spark Ignition (SI) engine was studied experimentally. A single cylinder diesel engine was modified to operate as a biogas operated spark ignition engine. The engine was operated at 1500 rpm at throttle opening of 25% and 100% at various equivalence ratios. The tests covered a range of equivalence ratios from rich to lean operating limits and also at an optimum compression ratio of 13:1 with normal and masked intake valve to enhance swirl. The spark timing was set to MBT (Minimum advance for Best Torque). It was found that masked valve configuration enhanced the power output and brake thermal efficiency at full throttle. The lean limit of combustion also got extended. Heat release rates indicated enhanced combustion rates with masked valve, which are mainly responsible for the improvement in thermal efficiency. NO level increased with masked valve as compared to normal configuration. The spark timings were to be retarded by about 6 CA and 4 CA when compared to normal configuration at 25% and 100% throttle respectively.
About the journal
JournalEnergy Conversion and Management
ISSN01968904
Open AccessNo
Concepts (14)
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    Brake thermal efficiency
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    EMISSIONS AND COMBUSTION
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    Engine performance
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    Equivalence ratios
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    Heat release rate (hrr)
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    SI ENGINES
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    SINGLE-CYLINDER DIESEL ENGINE
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    SPARK-IGNITION ENGINE
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    Biogas
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    Compression ratio (machinery)
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    Diesel engines
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    Electric sparks
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    Engines
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    Ignition