Stirling engine as an external combustion with high efficiencies and able to use any types of heat source is the best candidate recover waste exhausted gas by converting it into power. Thus, in this study was introduced evaluate possibility recovering from biomass produce For reason, Computational Fluid Dynamic (CFD) simulation test performed design initial computational model for low temperatu...

The effective power of an internal combustion engine is determined by the amount air that drawn into cylinder. One basic requirements for intake even filling all cylinders. This paper deals with design airbox 4-cylinder 2.2 liter naturally aspirated SI engine. CFD simulation flow through serial was performed. showed uneven With help simulations, shape optimized to improve uniformity cylinders f...

For a certain type of direct injection diesel engine, three-dimensional model single-cylinder complete combustion chamber and in-take/exhaust port was established. Three-dimensional Computational Fluid Dynamics (CFD) analysis software CONVERGE used for simulation. The effects fuel strategy geometry on emissions engine were studied while the volume, compression ratio, total quantity duration kep...

Water injection strategy is considered a promising technique to improve the performance of boosted engine and reduce NOx emission via latent heat water vaporization. Numerous research on has been conducted in-cylinder intake port injection. However, focusing spark ignition (SI) exhaust system still lacking. This study proposed pre-turbocharger turbine (PTWI) concept inlet temperature. was done ...

There are a number of systems in which supercritical cryogenic fluids are used as coolants or propellant fluids. In some modern military aircraft, the fuel is pressurized above its critical point and used as a coolant to remove heat from the aircraft engine. Accurate prediction of heat transfer coefficients to turbulent flows of supercritical fluids is essential in design of such systems. One o...

Stability against capsizing is one of the most fundamental requirements to design a ship. In this research, for the first time, CFD is performed to predict main modes of capsizing. CFD first is conducted to predict parametric rolling for a naval ship. Then CFD study of parametric rolling is extended for prediction of broaching both by using CFD as input to NDA model of broaching in replacement ...

Computational fluid dynamics (CFD) is a popular tool in the water industry for assessing ultraviolet (UV) reactor performance. However, due to the size of open-channel-type UV reactor systems, the CFD model requires significant computational time. Thus, most evaluations have been conducted using very simplified models. In order to ensure the reliability of this simplified CFD model, precise num...

Large eddy simulation is a promising advancement for IC engine modeling. This requires appropriate models for a many physical processes. This paper classifies and briefly describes the major types of models for turbulence, combustion, and sprays. Representative references are listed with an emphasis on engine applications. Recommendations for modeling approaches to use in engine LES are also pr...

Computational analysis of nucleate boiling occurring in liquid cooled applications, such as internal combustion engines is often implemented within a single phase Fluid Dynamics (CFD) framework, owing to low vapor fractions involved. With increase specific power and the resulting higher thermal loads, accounting for presence using multiphase framework required certain conditions, despite comput...

Purpose Aerodynamic shape optimisation is complex because of the high dimensionality problem, associated non-linearity and its large computational cost. These three aspects have an impact on overall time design process. To overcome these challenges, this paper aims to develop a method for transonic aerodynamic with reduction multifidelity techniques. Design/methodology/approach The developed me...