Temperature Estimates of Exhaust Plumes from a Turbine Driven by Pulsed Detonations

摘要

Phase- and time-averaged gas temperatures of unsteady exhaust plumes exiting from a turbine driven by pulsed detonation combustion are estimated using a unique combination of radiation intensity imaging measurements acquired with a calibrated highspeed infrared camera and inverse radiation analysis. The effects of operating frequency, equivalence ratio, fuel/air fill fractions, and air purge fractions on the temperatures are quantified and discussed. The results demonstrate that calibrated high-speed imaging of the radiation intensity from hot carbon dioxide coupled with inverse radiation analysis is an effective nonintrusive technique for estimating gas temperatures in low-luminosity, unsteady high-speed flows such as the exhaust plumes exiting from the turbine driven by pulsed detonation combustion.