Journal
FUEL
Volume 90, Issue 4, Pages 1476-1486Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2010.11.020
Keywords
JP-8; Laminar burning speed; Combustion instability; Diluent
Categories
Funding
- Army Research Office (ARO) [W911NF0510051]
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Experimental studies have been performed to investigate the flame structure and laminar burning speed of JP-8/oxidizer/diluent premixed flames at high temperatures and pressures. Three different diluents including argon, helium, and a mixture of 14% CO2 and 86% N-2 (extra diluent gases), were used. The experiments were carried out in two constant volume spherical and cylindrical vessels. Laminar burning speeds were measured using a thermodynamics model based on the pressure rise method. Temperatures from 493 to 700 K and pressures from 1 to 11.5 atm were investigated. Extra diluent gases (EDG) decrease the laminar burning speeds but do not greatly impact the stability of the flame compared to JP-8/air. Replacing nitrogen in the air with argon and helium increases the range of temperature and pressure in the experiments. Helium as a diluent also increases the temperature and pressure range of stable flame as well as the laminar burning speed. Power law correlations have been developed for laminar burning speeds of JP-8/air/EDG and JP-8/oxygen/helium mixtures at a temperature range of 493-700 K and a pressure range of 1-10 atm for lean mixtures. (C) 2010 Elsevier Ltd. All rights reserved.
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