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Where is the combustion chamber located on a jet engine? 

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The simulation results indicate that the crucial unit is the combustion chamber.
Finally, it may be concluded that the combustion chamber component of the engine should be focused on according to the results obtained.
The paper uses coupled computer-aided engineering and computational fluid dynamics (CFD) simulations to provide better details of the operation of the jet ignition pre-chamber (analysed so far with downstream experiments or stand-alone CFD simulations), thus resulting in a better understanding of the complex interactions between chemistry and turbulence that govern the pre-chamber flow and combustion.
This indicates that the developed combustion model is accurate for developing and validating turbulent jet ignition combustion control strategies.
Open accessProceedings ArticleDOI
Charles J. Trefny, Vance F. Dippold 
01 Nov 2010
8 Citations
These results also reveal the structure of, and interactions between the free-jet and recirculating combustion chamber flows.
It is also shown that there is an optimal distance between injectors for combustion characteristics and that the optimal distance increases as the jet-to-crossflow momentum flux ratio increases.
Both show significant advantages of utilization of the variable geometry combustion chamber in terms of performance and emissions reduction.
Measurements in fired engine operation demonstrate the influence of the flow field on combustion dynamics.
The features of the flow fields can be used as a reference for combustion chamber design.
The results have verified the similarities between combustion flowfields under different chamber pressures and geometries, with the criterion applied.

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What is the effects of chamber geometry on combustion in a DI diesel engine?5 answersThe effects of chamber geometry on combustion in a DI diesel engine have been studied experimentally and numerically. Different bowl geometries, such as New Combustion Chamber (NCC) and Toroidal re-entrant combustion chamber (TRCC), have been compared to standard combustion chamber (SCC) geometry. The results show that the new bowl geometries improve mixture formation, combustion characteristics, and exhaust emissions. The NCC geometry reduces specific fuel consumption and increases engine torque, while also reducing exhaust emissions such as CO, CO2, and soot. The TRCC geometry improves combustion stability and reduces pollutant emissions, including smoke, HC, and CO, in dual-fuel operations. Numerical analysis shows that the NCCS geometry reduces soot emissions and improves mixture formation, while slightly increasing NO emissions. Changing the combustion chamber geometry significantly affects the concentration of harmful substances in exhaust gases, with changes observed in NOx, CO2, particulate matter, and smoke emissions.
What is the Effects of Chamber Geometries for diesel engine performance?4 answersThe effects of chamber geometries on diesel engine performance have been studied in several papers. Different bowl geometries, such as New Combustion Chamber (NCC), Toroidal re-entrant combustion chamber (TRCC), and new combustion chamber system (NCCS), have been tested and compared to standard combustion chamber (SCC) geometries. These studies have shown that the new bowl geometries improve combustion characteristics and reduce exhaust emissions. The NCC geometry has been found to decrease specific fuel consumption and increase engine torque. The TRCC geometry has been shown to improve combustion performance and reduce pollutant emissions, such as smoke, HC, and CO, in dual-fuel operations. The new combustion chamber designs have also been found to improve mixture formation, decrease emissions of CO, CO2, and soot, and increase in-cylinder pressure and temperature. Overall, changing the combustion chamber geometry has a significant impact on engine performance and emissions, leading to more efficient and environmentally friendly diesel engines.
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