Study and Application on Simulation Software Using KIVA-3V Code

The three dimensional software (KIVA-3V code) is analyzed to calculate turbulent movement and combustion in internal combustion (IC) engines. Other new features in KIVA-3V include a particle-based liquid wall film model, a new sorting subroutine that is linear in the number of nodes and preserves the original storage sequence, a mixing-controlled turbulent combustion model, and an optional RNG k-¿ turbulence model. All features and capabilities of the original KIVA-3 have been retained. The grid generator, K3PREP, has been expanded to support the generation of grids with valves, along with the shaping of valve ports and runners. Graphics output options have also been expanded and the new features are discussed. Since in a real diesel engine the wall temperature are not constant, but varied over the cycle, energy equation in standard K¿VA-code is modified because of effect of wall heat. Since the shape of piston (4JB1) is not on the axis of symmetry, 3600 was modeled which corresponds x-offset 4 mm and y-offset 1 mm. Finally, temperature field are compared with experimental data. It gives the new theory and method about calculating turbulent movement and combustion exactly in IC engine.