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This paper presents the latest development of authors' work on multiple-cylinder engine CFD simulation using Ricardo's engine-focused commercial CFD code, VECTIS. The detailed chemistry-based Ignition Progress Variable Library (IPV-Library) approach has been used for combustion modelling. The simulation is performed on a 4-cylinder in-line Diesel engine, covering the processes of intake, compression, spray, combustion and exhaust. The cyclically converged solution is compared to the engine test data. With a detailed chemistry-based combustion modelling scheme, the approach has the capability to cover a broader range of operating conditions and also different types of engine combustion. Additionally, in terms of computational cost, the use of a combustion reaction library in the framework of cell-based CFD analysis ensures great efficiency.

This paper presents the CFD simulation performed on a 4-cylinder in-line Diesel engine using Ricardo's engine focused commercial CFD code VECTIS. Simulation run through multiple cycles and covered processes of intake, compression, spray, combustion and exhaust. The cyclically converged solution is compare to the engine test data for cylinder pressure, charge distribution and EGR distribution, etc… Technical issues concerning multiple-cylinder analysis are discussed.

This paper explains the principle and advantages of the Ignition Progress Variable Library (IPV-Library) approach and its use in predicting engine related premixed, non-premixed and compression ignited combustion events. The implementation of IPV-Library model in the engine-focused CFD code VECTIS is described. To demonstrate the application of the model in predicting various types of combustion, computational results from a 2-stroke HCCI engine, a premixed spark ignition engine and an HSDI diesel engine are presented, together with some comparisons with engine test data.

The homogeneous mixing flow modelling approach has been incorporated in a CFD framework to study subcooled nucleate boiling heat transfer that may occur in IC engine cooling passages. The approach is based on the assumption that vapour bubbles are small and perfectly mixed with the liquid phase (bubbly boiling flow pattern). A void faction equation has been introduced into the single phase CFD solver to describe the concentration of the vapour phase. Superheated wall heat transfer, fluid evaporation and condensation mass transfer are described by sub-models. Primary validations of the method have been conducted using channel boiling flow data from the literature over a range of flow speed, liquid subcooling and wall superheat conditions. The predicted wall heat flux and vapour concentration distributions are in satisfactory agreement with the experimental measurements.