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Showing 1 to 11 of 11 for “"Premixed fuel"”.
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High load limits of the controlled autoignition engine
… is characterized by a fast, volumetric burn of a premixed fuel and air mixture that is heavily diluted with either excess air or burned gas. One problem that limits the engine's introduction into the market is that the rate of combustion can be fast to the point that it is very loud and is …
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Phase Shift Control: Application and Performance Limitations With Respect to Thermoacoustic Instabilities
Lean premixed fuel-air conditions in large gas turbines are used to improve efficiency and reduce emissions. These conditions give rise to large undamped pressure oscillations at the combustor's natural frequencies which reduce the turbine's longevity and reliability. Active control of the pressure …
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High voltage repetitive pulsed nanosecond discharges as a selective source of reactive species
… that would otherwise be unstable, such as in fuel-lean mixtures which are interesting to reduce NOx production. Additionally, certain regimes might produce pressure waves strong enough to excite uid instabilities, if triggered at the right repetition frequency, and enhance mixing. Experiments …
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Experimental and computational study of soot formation under diesel engine conditions
… diesel combustion, soot is formed in local premixed fuel-rich regions. This project focuses on the fundamentals soot formation under fuel-rich conditions similar to those in diesel engine operation. Since these conditions cannot be easily reproduced in typical laboratory scale experiments, …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… of the furnace was done by varying the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the wake of combustion,focusing on convection, temperature …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… of the furnace was done by varying the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the wake of combustion,focusing on convection, temperature …
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The HCCI Fuel Number - Measuring and Describing Auto-ignition for HCCI Combustion Engines
HCCI is an advanced combustion concept, using premixed fuel and air with a diluted charge. This is thermodynamically favorable, leading to high efficiency and therefore lower CO2 emissions. The well-premixed and diluted fuel charge gives lower cylinder temperatures than conventional diesel …
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Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine
… analyses are generally modeled with perfectly premixed fuel injection and do not capture the effects of improper mixing arising due to discrete injection of fuel and oxidizer into the chamber. To model realistic injection in a 2-D analysis, the current work uses an approach in which, a …
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An Investigation Of The Autoignition Of Power Generation Gas Turbine Fuel Blends Using A Design Of Experiments Approach
Natural gas has grown in popularity as a fuel for power generation gas turbines. However, changes in fuel composition are a topic of concern since fuel variability can have a great impact on the reliability and performance of the burner design. In particular, autoignition of the premixed fuel and …
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Knock mitigation on boosted Controlled Auto-Ignition engines with fuel stratification and Exhaust Gas Recycling
… carried out to understand the mechanism of using fuel stratification and Exhaust Gas Recycling (EGR) for knock mitigation on boosted Controlled Auto-Ignition (CAl) engines. Experiments were first conducted on Rapid Compression Machine (RCM) to profile the ignition characteristic of the specific …
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Fundamental studies of flame propagation in lean-burn natural gas engines
… of ignition can be improved by employing a dual-fuel ignition strategy in which a small quantity of diesel fuel is injected to initiate ignition. Computational studies of n-heptane/methane-air mixing layers are performed to provide insight into the fundamental physics of dual-fuel ignition. The …