Unsteady flow within the intake system of a hydrogen–air pulse detonation engine (PDE) has been analyzed using a quasi-one-dimensional (Q1D) computational fluid dynamic (CFD) code. The analysis provides insight into the unsteady nature of localized equivalence ratios and their effects on PDE performance. For this purpose, a code originally configured to model the PDE tube proper was modified to include a 6.1 m long intake with a single fuel injector located approximately 3.05 m upstream of the primary intake valve. The results show that constant fuel mass flow rate injection from the injector creates large local variations in equivalence ratio throughout the PDE within a cycle. The effect of fill fraction on the engine performance is better described with the presence of the inlet model. However, the effect of ignition delay is shown to be better predicted with a model without the inlet.
Intake Flow Analysis of a Pulsed Detonation Engine
Contributed by the Aircraft Engine Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received October 15, 2015; final manuscript received August 7, 2016; published online October 18, 2016. Assoc. Editor: Eric Petersen.
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Strafaccia, J. A., Ölçmen, S. M., Hoke, J. L., and Paxson, D. E. (October 18, 2016). "Intake Flow Analysis of a Pulsed Detonation Engine." ASME. J. Eng. Gas Turbines Power. April 2017; 139(4): 041201. https://doi.org/10.1115/1.4034635
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