Fully compressible combustion simulation of RCM in hierarchical cartesian mesh system by immersed boundary method

The combustion of Rapid Compression Machine (RCM) is investigated numerically. All speed compressible flow solver by Roe scheme and 5th order MUSCL coupled with species transport equations is adopted for the flow and temperature fields and density of reacting species. Chemical reaction and combustion is conducted by equilibrium solver of Cantera module, which is used for evaluating the equilibrium state of the reacting flow and merged with the flow solver and G-equation flame front approach. For the treatment of RCM geometry and moving piston, the Immersed boundary method is introduced in Hierarchical Cartesian mesh system. The validation is carried out by the comparison with experimental work. The simulation showed good agreement with experimental data by the quantitative results of chamber pressure and the flow visualization of flame patterns and propagation speed.