... transients health monitoring gas turbines The analysis of gas turbine behavior represents a challenging task due to the nonlinear system dynamics and component complexity which impedes the identification of exact model parameters [( 1 )]. The system operation typically exhibits transitions...

... and efficiency of heavy duty spark ignition engines. With stoichiometric conditions, a three way catalyst can be used, which keeps the regulated emissions at very low levels. The Lambda window, which results in very low emissions, is very narrow. This issue is more complex with transient operation, resulting...

.... To investigate the transient behavior five open loop simulations are carried out changing different model inputs, as well as all model inputs applying a 30% load change according to the operating curve. The simulated behavior reveals that the inputs should be changed with specific care to avoid critical...

... criteria, e.g., fuel economy, emissions, and acceleration. These methods, however, are not efficient in capturing transient engine operation designated by common driving habits, e.g., stop-and-go driving, rapid acceleration, and braking. An alternative approach was developed recently, which makes...

...Xavier Tauzia; Pascal Chesse; Jean-François Hetet; Nicolas Thouvenel During the last decades, pollutant emissions from internal combustion engines used for transportation have become a major concern. Today, not only steady state emissions but also emissions during transients are regulated and have...

... and damper contact locations, and exposure to high-pressure hydrogen. The blades are also subjected to extreme variations in temperature during start-up and shutdown transients. The most prevalent high-cycle fatigue (HCF) failure modes observed in these blades during operation include crystallographic crack...

... combustion engines noise transients modelling signal processing time-frequency analysis Internal combustion (IC) engine noise has been drawing significant attention from automotive manufacturers. To effectively reduce the noise level, the first step is the identification of noise sources, which...

... adapted to any kind of plant configuration. Simulation tests of the transients after load rejection have been carried out for a single-shaft heavy-duty gas turbine and a double-shaft aero-derivative industrial engine. Time plots of the main variables that describe the gas turbine dynamic behavior...