Mathematical Modeling of Knocking Combustion and Created Pressure Inhomogeneity Inside the Combustion Chamber in HCCI Engines Via Multi Zone Model

2020 ◽  
Vol 105 (1) ◽  
pp. 213-236
Author(s):  
Mohsen Asghari ◽  
Rahim Khoshbakhti Saray ◽  
Elaheh Neshat
Keyword(s):  
Mathematical Modeling ◽  
Combustion Chamber ◽  
Zone Model ◽  
Hcci Engines

The Mathematical Modeling of Utility Boilers at IST

2000 ◽  
Author(s):  
P. J. Coelho ◽  
J. L. T. Azevedo ◽  
L. M. R. Coelho
Keyword(s):  
Mathematical Modeling ◽  
Combustion Chamber ◽  
Difficult Problem ◽  
The Other ◽  
Utility Boilers ◽  
Coal Reburning ◽  
Physical Phenomena

Abstract The mathematical modeling of utility boilers is a difficult problem due to the multiplicity of physical phenomena involved and to the interaction between different phenomena. However, reliable models are extremely useful since they can be used to design new equipment, and to optimize and retrofit units in operation. In this paper a survey of the work carried out at Institute superior Técnico (IST) in Lisbon is reported. Only the work based on comprehensive models, i.e., those accounting for all the relevant physical phenomena taking place in the combustion chamber is addressed. The models employed are briefly outlined. Then, four examples of application are given, two of them for coal-fired boilers where the effect of low NOx burners and coal over coal reburning is investigated, and the other two for oil-fired boilers where parallelization of the code and simulation of the convection chamber are reported.

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