Constrained reaction volume approach for studying chemical kinetics behind reflected shock waves

Abstract
We report a constrained-reaction-volume strategy for conducting kinetics experiments behind reflected shock waves, achieved in the present work by staged filling in a shock tube. Using hydrogen-oxygen ignition experiments as an example, we demonstrate that this strategy eliminates the possibility of non-localized (remote) ignition in shock tubes. Furthermore, we show that this same strategy can also effectively eliminate or minimize pressure changes due to combustion heat release, thereby enabling quantitative modeling of the kinetics throughout the combustion event using a simple assumption of specified pressure and enthalpy. We measure temperature and OH radical time-histories during ethylene-oxygen combustion behind reflected shock waves in a constrained reaction volume and verify that the results can be accurately modeled using a detailed mechanism and a specified pressure and enthalpy constraint. © 2013 The Combustion Institute.

Citation
Hanson RK, Pang GA, Chakraborty S, Ren W, Wang S, et al. (2013) Constrained reaction volume approach for studying chemical kinetics behind reflected shock waves. Combustion and Flame 160: 1550–1558. Available: http://dx.doi.org/10.1016/j.combustflame.2013.03.026.

Acknowledgements
The authors acknowledge Tamour Javed from KAUST for his assistance in the operation of the shock tube. This work was supported by the Army Research Office, with Dr. Ralph Anthenien as Contract Monitor.

Publisher
Elsevier BV

Journal
Combustion and Flame

DOI
10.1016/j.combustflame.2013.03.026

Permanent link to this record