Lean Limit Combustion Analysis for a Spark Ignition Natural Gas Internal Combustion Engine
| Autor: | Michael J. Brear, Pedro J. Orbaiz, Harry C. Watson, Payman Abbasi Atibeh, Peter A. Dennis |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
General Chemical Engineering
Nuclear engineering Homogeneous charge compression ignition General Physics and Astronomy Energy Engineering and Power Technology Naturally aspirated engine General Chemistry Diesel cycle Fuel Technology Internal combustion engine Spark-ignition engine Environmental science Ignition timing Engine knocking Combustion chamber |
| Zdroj: | Combustion Science and Technology. 185:1151-1168 |
| ISSN: | 1563-521X 0010-2202 |
| DOI: | 10.1080/00102202.2013.769785 |
| Popis: | This article presents a study of the performance and combustion characteristics of a lean burn, natural gas fuelled, naturally aspirated, spark ignition engine, particularly toward the lean limit. Engine performance and emissions (NO, CO, and UHC) are first discussed. An energy balance of the engine operating at different loads and air–fuel ratios is then presented, and used to explain why engine efficiency varies with air–fuel ratio. The modeled in-cylinder turbulence and turbulent flame speeds are plotted on the Bradley diagram as well, showing that at all operating conditions, leaner combustion moves combustion progressively deeper into the quench region. This is consistent with the observed UHC emissions and combustion variability with increased λ. It also shows that the peak engine efficiency at some λ is the result of a trade-off between engine heat losses and flame quenching. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|