CUED Publications database

Investigation of supersonic combustion dynamics via 50 kHz CH∗ chemiluminescence imaging

Allison, PM and Frederickson, K and Kirik, JW and Rockwell, RD and Lempert, WR and Sutton, JA (2017) Investigation of supersonic combustion dynamics via 50 kHz CH∗ chemiluminescence imaging. In: UNSPECIFIED pp. 2849-2856..

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Abstract

The mean heat release characteristics and the dynamic flame behavior occurring within a high-speed premixed ethylene/air combustion environment was studied using high-speed (50 kHz) CH∗ chemiluminescence imaging in a fully premixed cavity- stabilized combustor. The mean CH∗ chemiluminescence which is a representative marker of the heat release from the flame exhibited a spreading angle of 9.5° and the leading edge of the flame was stabilized near the mid- point of the cavity. Fluctuations in the flame brush width resulted in cyclical oscillations in the flame spreading angle which can vary more than 10° over a short (oscillating) time period. The strongest peaks of both the CH∗ signal and flame brush width occur at 340 and 280 Hz which characterize the global unsteadiness of the combustor.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:26
Last Modified: 15 Aug 2017 01:27
DOI: