Details

Autor(en) / Beteiligte

• Kumar, Kamal

Titel

Global combustion responses of practical hydrocarbon fuels: n-heptane, iso-octane, n-decane, n-dodecane and ethylene

Erscheinungsjahr

2007

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The dissertation topic deals with experimental investigations into three distinct global combustion responses for premixed hydrocarbon/oxidizer mixtures, namely laminar flame speed, extinction stretch rate and ignition delay. The emphasis was on the alkane components of practical liquid fuels namely n-heptane, iso-octane, n-decane and n-dodecane. Additionally, ethylene, being one of the key intermediaries in the oxidation of higher hydrocarbons, was also studied. The laminar flame speed and extinction stretch rate are representative of high temperature oxidation, while the ignition delay represents the low-to-intermediate temperature oxidation chemistry. A study to observe the chemical kinetic interactions in binary fuel blends of n-decane/ethylene/air and n-decane/methane/air mixtures was also conducted. Additionally, a comparison of the experimental data with results obtained using numerical simulations was also done. For the purpose of numerical modeling, chemical kinetic models available in literature were used. The results obtained in this work augment the relatively sparse experimental data available for validation of chemical kinetic models intended to model liquid hydrocarbon combustion, especially for the high boiling point fuels. The utility of the experimental results stems from the fact that all of the responses investigated are of relevance to practical devices. The enhancement of mass burning rate under ambient pressures due to mixture preheat has been obtained, which can be associated to combustor power density. The high pressure and low temperature autoignition results are of relevance to emerging internal combustion engine concepts, some of which attempt to achieve a controlled autoignition. The kinetic features observed in the autoignition characteristics of binary blends can also be put to good use.