CFD modeling of constant-volume Diesel combustionconsidering conventional and alternative fuels
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- Tez No: 786635
- Danışmanlar: PROF. TOMMASO LUCCHINI
- Tez Türü: Yüksek Lisans
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: CFD, Diesel Combustion, OpenFOAM, RIF, TRIF, TWM, ADF, Lib-ICE, DME
- Yıl: 2018
- Dil: İngilizce
- Üniversite: Polıtecnıco Dı Mılano
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
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Özet (Çeviri)
The aim of this thesis is to analyze non-premixed combustion which is also referred to diesel combustion with four different combustion models which are Representative Interactive Flamelet (RIF) Model, Tabulated Well-Mixed (TWM) Model, Tabulated Representative Interactive Flamelet (TRIF) Model and Approximated Diffusion Flamelet (ADF) Model. In addition to this, different chemistry mechanisms and fuels are validated with RIF model. Soot formation prediction is also one of the parts of this study by adapting semi-empirical soot model by Leung et al. into TWM model since tabulation gives benefit on time consideration. CFD simulations are performed under constant volume vessel by using OpenFOAM which is a Linux based open source CFD tool. Lib-ICE application and libraries are developed by Politecnico di Milano Internal Combustion Engine Group and they are used to perform combustion simulations with described models since all solvers are already included in libraries. Validation of the simulations are exercised by experimental data provided by Sandia National Laboratories, Engine Combustion Network. First of all, the behavior of combustion models is tested with n-dodecane fuel under different operating conditions with respect to experimental one in order to understand how models are capable of predicting combustion phenomena accurately in terms of heat release rate and maximum temperature within the vessel. After validation of the combustion models, trend for soot particle formation are exercised with TWM model by changing the particular constants defined in soot model and behavior of DME which is an alternative fuel for diesel engines is investigated with validated RIF combustion model.
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MUSA SARICA
