This paper presents analysis of the effect of actuation on combustion dynamics. Two different categories of actuators are examined: flow sources, e.g., acoustic speakers, and heat sources, e.g., fuel injectors. These sources are modeled in the conservation equations and a finite dimensional model is obtained. Two methods of analysis are used to gain insight into the physics of actuation, and it...

The effect of nozzle number on the combustion and emission characteristics diesel engines operating at high altitudes was investigated in this study. A three-dimensional computational fluid dynamics model developed to simulate spray spatial distribution, which is closely related number. intake pressure identified as dominant factor under varying altitudes, while fuel mass, injection timing temp...

A sensor for carbon monoxide detection based on broadband absorption spectroscopy with a gas correlation filter is developed using a miniaturized light source and detector without the need of a mechanical chopper to alternate between two gas correlation cells into the optical path. Measurements were conducted using calibrated CO/N2 mixtures and sampled combustion products from a diffusion flame...

The development and implementation of a diesel engine combustion system simulation model is described. The model is a crank angle based combustion model, which uses the conditions in the intake and exhaust manifolds together with the fuel injection signal from the engine control unit to estimate the in-cylinder pressure throughout a complete combustion cycle. The model is implemented in Matlab....

The control of a class of combustion systems, suceptible to damage from self-excited combustion oscillations, is considered. An adaptive stable controller, called Self-Tuning Regulator (STR), has recently been developed, which meets the apparently contradictory challenge of relying as little as possible on a particular combustion model while providing some guarantee that the controller will cau...