Oxy-fuel coal combustion with flue gas re-circulation is known to be one of the most promising methods for reducing CO2 emissions from coal combustion power plants. In the oxy-fuel system, the combustion atmosphere consists of only O2 separated from air and flue gas re-circulated from a stack. Therefore, the flue gas is dominated by CO2 without any nitrogen gas. The most attractive potential as...

AbstructCylinder pressure is an important parameter in engine combustion analysis or engine diagnosis. An approach is introduced to estimate cylinder pressure and combustion heat release in multicylinder SI engines based solely on engine speed measurements. Because of the nonlinear nature of engines, this estimation employs a nonlinear observer: the Sliding Observer. In many applications, cylin...

Flameless combustion represents a very appealing combustion technology due to its potential of coupling very high combustion efficiency with low NOx combustion emissions. However, due to its young character, the numerical modeling of flameless combustion is still characterized by open research questions, in particular related to the choice of the combustion model and of the kinetic mechanism. I...

Even if the goal of reducing NOx emissions pushes towards the use of premixed combustion, moderately swirling turbulent non-premixed flames are still widely employed in both industrial furnaces and gas turbines, because of their stable and safe behaviour in a wide range of fuels and operating conditions. Computational Fluid Dynamics (CFD) has become in recent years a key tool for the design of ...

For large and complex reacting systems, computational efficiency becomes a critical issue in process simulation, optimization and model-based control. Mechanism simplification is often a necessity to improve computational speed. We present a novel approach to simplification of reaction networks that formulates the model reduction problem as an optimization problem and solves it using geneti...

Fuel injection is systems for supplying high pressurize fuel to maximum mixing of fuel with air in an internal combustion engine. Direct Injection (DI) Systems as used in DI engines, in which the fuel is injected directly into a combustion chamber formed in the clylinder itself. The fuel injector directly injects fuel into the direct fuel injection system. The injector is a very complicated par...

Using low price heavy fuel oil (HFO) in high-speed diesel engines is a practical way to reduce running costs. However, most high-speed diesel engines’ fuel systems and combustion systems cannot adapt to HFO. This causes the problem of deterioration of combustion performance. In order to solve this problem, the authors have modified the fuel injection system and combustion system of a high-speed...

Fire prevention, detection, and suppression requirements for spacecraft have been developed primarily from established terrestrial and aircraft systems aided by the experience gained from previous space operations. However, the most important factor distinguishing spacecraft fire protection from terrestrial systems is the low-gravity environment that dominates fire and particulate behavior and ...

 This paper presents a mathematical model of the cylindrical particle combustion in a fluidized bed reactor. This particle is composed of sewage sludge. The model performs a mathematical description of the physical and chemical phenomena that occur during particle combustion. The uniform particle model without ash accumulation is proposed. Sewage sludge is considered composed of three fractio...