2016/06/20 by M. Werler, Werler, Marc, Robert Schießl +3
Chemical Engineering · Engineering · Physics and Astronomy · #Advanced Combustion Engine Technologies #Advanced Control Systems Optimization #Advanced Thermodynamics and Statistical Mechanics #Carbon Dioxide Capture Technologies #Chemical Physics (physics.chem-ph) #Combustion and flame dynamics #FOS: Physical sciences #Heat transfer and supercritical fluids
paper · pdf · doi:10.48550/arxiv.1606.06095
openalex publication_date 2016/06/20 · openalex created_date 2022/10/01 · openalex updated_date 2026/07/28
A novel extension of a rapid compression machine (RCM), namely a Rapid\nCompression Expansion Machine (RCEM), is described and its use for studying\nchemical kinetics is demonstrated. Like conventional RCMs, the RCEM quickly\ncompresses a fuel/air mixture by pushing a piston into a cylinder; the\nresulting high temperatures and pressures initiate chemical reactions. In\naddition, the machine can rapidly expand the compressed gas in a controlled way\nby pulling the piston outwards again. This freezes chemical activity after a\npre-defined reaction duration, and therefore allows a convenient probe sampling\nand ex-situ gas analysis of stable species. The RCEM therefore is a promising\ninstrument for studying chemical kinetics, including also partially reacted\nfuel/air mixtures. The setup of the RCEM, its experimental characteristics and\nits use for studying chemical reactions are outlined in detail. To allow\ncomparisons of RCEM results with predictions of chemical reaction mechanisms, a\nsimple numerical model of the RCEM process is described. As a first\napplication, ex-situ measurements of the temporal evolution of species in\npartially reacted dimethyl ether/methane-mixtures are presented, and the\nresults are compared to predictions of a reaction mechanism.\n