Alcohol combustion chemistry

Recent progress in the development of diesel surrogate fuels

http://engine.princeton.edu/Publications/Effect%20of%20cylindrical%20confinement.pdf

Effect of cylindrical confinement on the determination of laminar flame speeds using outwardly propagating flames

A comprehensive review of measurements and data analysis of laminar burning velocities for various fuel+air mixtures

A physics-based approach to modeling real-fuel combustion chemistry - I. Evidence from experiments, and thermodynamic, chemical kinetic and statistical considerations

Laminar burning speed measurement and flame instability study of H2/CO/air mixtures at high temperatures and pressures using a novel multi-shell model

Laminar burning speed of ethanol/air/diluent mixtures have been measured over a wide range of temperature, pressure, fuel air equivalence ratio and diluent. Experimental facilities include a cylindrical vessel with two large end windows and a spherical vessel with capability to withstand pressures up to 425 atm. Both of these vessels are heated for having initial temperatures of unburned gas up to 500 K. A shadowgraph system with a CMOS camera capable of taking pictures up to 40,000 frames/s is used to observe structure of propagating flames. Pressure rise due to combustion in both vessels is used to calculate laminar burning speed of the mixture. A thermodynamic model is used to calculate burning speed from combustion pressure. Laminar burning speeds of ethanol/air premixed mixtures have been measured at high temperatures and pressures. A mixture of 86% nitrogen and 14% carbon dioxide, which simulate heat capacity of residual gases in internal combustion engines, is used to determine the effect of diluent on burning speed. A correlation for laminar burning speed as a function of temperature, pressure, equivalence ratio and extra diluent gas (EDG) has been developed. The range of temperature and pressure are 300–650 K and 1–5 atm, fuel air equivalence ratio 0.8–1.1 and extra diluent gases of 5% and 10%. The measured values compare very well with available data and extend the range many folds.

Laminar burning speeds of ethanol/air/diluent mixtures

On the flame stability and laminar burning speeds of syngas/O2/He premixed flame

The burning speed and flame structure of Jet Propellant (JP)-10 fuel-air mixtures have been studied using two similar constant volumes: a cylindrical vessel with end windows and a spherical chamber. Both vessels are equipped with a central ignition, pressure transducer for measuring pressure rise during combustion process and ionization probes for monitoring flame arrival time. Both spherical and cylindrical chambers can be heated up to 500 K. The spherical vessel can withstand 425 atm pressures while the maximum allowable pressure for cylindrical chamber is 50 atm due to the two windows at end caps. A thermodynamic model has been developed to calculate burning speed using dynamic pressure rise in the spherical vessel. The model considers a central burned gas core of variable temperature surrounded by a preheat zone, an unburned gas shell with uniform temperature and a thermal boundary layer at the wall. The model also includes losses associated with thermal radiation from burned gas to the wall ...

Hameed Metghalchi

Papers

Laminar burning speed measurement and flame instability study of H2/CO/air mixtures at high temperatures and pressures using a novel multi-shell model

Laminar burning speeds of ethanol/air/diluent mixtures

On the flame stability and laminar burning speeds of syngas/O2/He premixed flame

Flame structure and burning speed of jp-10 air mixtures

On flame kernel formation and propagation in premixed gases