Abstract—Producer gas is a biomass derived gaseous fuel which is extensively used in internal combustion engines for power generation application. Unlike the conventional hydrocarbon fuels (Gasoline and Natural gas), the combustion properties of producer gas fuel are much different. Therefore, setting of optimal spark time for efficient engine operation is required. Owing to the fluctuating ten...

Flame ignition by short-duration (≈ 50 ns) transient plasma, or corona, discharges was investigated for methane-air, propane-air and butane-air mixtures at atmospheric and elevated pressures. Such discharges produce a larger fraction of high-energy electrons, yield more spatially distributed energy and deposit energy in the gas more efficiently than conventional arc discharges do. We show that ...

The aviation industry is expected to grow at a rate of 4-5% in the next 20 years. Such a growth rate may have important impacts on local air quality, climate change and community noise. This work assesses selected technologies and operational procedures aimed at improving the environmental performance of future airplanes. Two different studies are presented: estimating turbine durability benefi...

Introduction Combustion in excess oxygen, as in dieseland lean-burn engines, significantly improves the fuel economy, i.e. reducing the CO2 emissions. However, the lean environment in the exhaust gas obstructs the NOx reduction ability of the three-way catalyst, thus emphasizing the need for alternative techniques, where one promising is selective catalytic reduction with hydrocarbons (HC-SCR)....

Hydrogen is considered to be a suitable supplementary fuel for Spark Ignition (SI) engines. The energy and exergy analysis of engines important provide theoretical fundaments the improvement efficiency. However, few studies on balance engine working under Direct Injection (HDI) plus Gasoline Port (GPI) mode lean-burn conditions are reported. In this paper, effects two different modes SI present...

As the most reliable alternative energy source for traditional fuel engines, natural gas has been widely used in inland river marine engines. The engine is faced with problem of increased cyclic variations under condition lean combustion. In this paper, a multi-point injection spark ignition tested different burn degrees to investigate correlation between parameters and variation, including acc...

The stringent regulations set by the International Maritime Organization on pollutant emissions combined with rise in fuel prices have stimulated research cleaner fuels and new propulsion systems. This study describes a method for evaluating alternative technologies that can be utilised marine sector to replace heavy oil diesel engines, thus improve their performance while lowering carbon dioxi...

Aggressive fuel burn and carbon dioxide emission reduction goals for future gas turbine engines will require higher overall pressure ratio, and a significant increase in turbine inlet temperature. These goals can be achieved by increasing temperature capability of turbine engine hot section materials and decreasing weight of fan section of the engine. NASA is currently developing several advanc...