Influence of Piston Initial State on HCCI Combustion in Micro Free-Piston Engine Using Experiment Images and CFD Analysis

Abstract:

The visualization experimental setup of micro free-piston engine has been built, the process of single shot compression combustion in micro combustion chamber has been observed by the high-speed digital camera; Based on the propane combustion kinetics, the numerical calculation method for combustion process coupling with the free-piston movement was put forward, through editing the dynamic mesh subroutine in STAR-CD, the process of homogeneous charge compression ignition (HCCI) in the micro chamber was studied; The influence of piston initial state on HCCI combustion process was analyzed , indicating that the piston mass directly affects the homogeneous gas compression ratio, ignition time, single combustion process cycle and the changes of combustion pressure and temperature, all this research can be the basic theories for designing the micro free piston engine .

• Periodical: Advanced Materials Research (Volumes 724-725)
• Pages: 1350-1354
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.724-725.1350
• Online since: August 2013
• Authors: Jin Bai, Qian Wang, Zhi Xia He, Peng Gang Zhang
• Keywords: Free Piston, HCCI, Micro Engine, Numerical Simulation, Visualization

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