ISSN: 2578-4846
Authors: Hajibabaei M, Zehni A* and Raeitabar A
As a result of recent focus on the control of Low Temperature Combustion (LTC) modes, dual-fuel combustion strategies such as Reactivity Controlled Compression Ignition (RCCI) have been developed. In this study, Considering the FIRECHEMKIN algorithm, a numerical approach is devised to assess the temperature and concentration effect of intake methane as a low reactive fuel in the combustion and emission characteristics of RCCI combustion to evaluate the parameters involved in this study, the calculations are performed at full load state at the engine speed of 1400 rpm in which the worst engine condition regarding exhaust gas emissions is occurred. The results demonstrate that the increment of intake temperature does not necessarily lead to a higher cylinder temperature and pressure. Furthermore, the role of equivalence ratio is more dominant compared to the role of intake temperature for the net production of Soot in the EVO. The conclusions can open a new prospect for the future researches. Differential scanning colarimetry (DSC) analyzer gave thermogram curves revealing one glass transition temperature for PMMA/PVAc blends except at (20/80) composition, this indicates that the system is miscible except at (20/80) composition. But, PVC/PS blends showed two glass transition temperatures so the system is immiscible. FTIR analysis for PMMA/PVAc blends depicted a weak interaction between the two polymers and solvent due to the miscibility establishment, whilst for PVC/PS blends, there was no interaction between two polymers to establish the miscibility, this indicates immiscible system. Calculations of Flory –Huggins interaction parameter for two systems was performed and the results pointed to miscible blend for PMMA/PVAc blends and immiscible blend for PVC/PS blends. So there is a good agreement between the experimental results and calculations of interaction parameter based on Flory – Huggins theory.
Keywords: LTC; RCCI; Combustion; NOx; Soot
