Heat Transfer Characterization of a High Heat Flux Oxy-Fuel Direct Power Extraction Combustor

摘要

The present study presents the analysis of a supersonic open-cycle MHD combustor capable of delivering combustion products exceeding 2800K and 2000m/s. For the analysis, a 60-kW prototype was modeled for steady-state operation at near-stoichiometric conditions for a O_2-CH_4 mixture. A 2-D fully coupled numerical method for heat transfer characterization was developed for the estimation of heat flux and wall temperature parameters. Results show that the use of CFD can provide increased accuracy over semi-empirical or empirical equations when estimating nozzle heat flux. Chamber temperature and heat flux were shown to match experimental results to within 3% at the combustor's maximum operating condition.