The combustor is 6.06” (\~154 mm), radially fed with air, has a channel gap width of 0.3” (7.62 mm) making the inner diameter 5.46” (\~139 mm), and an air gap slot height of 0.022” (0.56 mm). The auxiliary fuel plenum consists of 80 discrete injection points that are 0.035” (\~.89 mm) in diameter and impinge axially on the radially fed air as to assist in mixing. Coal particles have been injected into the combustor through the oxidizer line acting as a solid-gas phase premixture, where hydrogen has been utilized to support the detonation structure. A concentration ratio of coal to hydrogen was created and varied such that the detonation wave(s) were sustained through the entire event, where quenching limits were discovered when the concentration of particles did not allow for proper mixing with the auxiliary hydrogen. Measurements inside of the multiphase Rotating Detonation Engine have been investigated where wave direction and cycle averaged velocities have been quantized with high-speed backend imaging using FFTs. Carbon black and sub-bituminous coals were injected into the combustor having particle sizes ranging from 30nm - 20µm, volatility ranges from 1-30%, and carbon concentrations ranging from 65-99%. These results were validated against Computational Fluid Dynamics using the exact same injection rates and geometry provided by Georgia Tech.


Multiphase Rotating Detonation Engine

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

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