A constant-pressure model for the overlap of chambers in rotary internal combustion engines

LÓPEZ, EZEQUIEL JOSÉ; LÓPEZ, EZEQUIEL JOSÉ; WILD CAÑÓN, CARLOS; WILD CAÑÓN, CARLOS; SARRAF, SOFÍA SOLEDAD; SARRAF, SOFÍA SOLEDAD

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME

ASME-AMER SOC MECHANICAL ENG

Lugar: New York; Año: 2016 vol. 138 p. 112808 - 112808

0742-4795

In this work, a constant-pressure model capable to simulate the overlap of chambers inrotary internal combustion engines is proposed. It refers as a chamber overlap when twoadjacent chambers are in communication through the same port, which could occur insome rotary internal combustion engines. The proposed model is thermodynamic (orzero-dimensional (0D)) in nature and is designed for application in engine simulatorsthat combine one-dimensional (1D) gasdynamic models with thermodynamic ones. Sincethe equations of the proposed model depend on the flow direction and on the flow regime,a robust and reliable solution strategy is developed. The model is assessed using a twodimensional(2D) problem and is applied in the simulation of a rotary internal combustionengine. Results for this last problem are compared with other common approachesused in the simulation of rotary engines, showing the importance of effects such as theinteraction between overlapping chambers and the dynamics of the flow.