二連式バルブレスパルスバーナに関する研究 : 第2報,パルス燃焼時の温度分布特性

概要

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Detailed temperature profiles in the twin valveless pulse combustor have been measured using a newly-designed coherent anti-Stokes Raman spectroscopy (CARS) to understand the fundamental pulse combustion processes for the engineering design. Time-averaged and ensemble-averaged temperatures in a combustion chamber were obtained from a constant 20Hz data sampling and a phase locked data sampling, respectively. The CARS successfully demonstrated near real-time, spatially and time-resolved, nonintrusive temperature measurement. Results show that very large temperature oscillations of up to 600 K exist near the wall upstream of the combustion chamber, while stable and homogeneous temperature regions were created in the rest of the combustion chamber. The maximum temperature was found to be 200 to 400 K lower than the adiabatic flame temperature. Also, comparison of one-cycle ensemble data between temperature and heat release rate gives a similar tendency, this indicating that the fuel-air mixing rate affects significantly the ignition delay time.
社団法人日本機械学会の論文
1989-08-25