Abstract
Experimental studies are carried out to investigate the performance of various pulse detonation engine (PDE) driven ejector configurations. In particular the effects of detonation tube length and ejector-to-PDE diameter ratio (DR) are studied. This research employs a H2-air PDE at 25 Hz operating frequency. Performance was quantified by thrust measurements. It was found that decreasing the detonation tube length increases the ejector thrust augmentation. An optimum ejector-to-PDE diameter ratio was found to exist in the range DR=3 to DR=3.67. The specific impulse of the PDE increases from the baseline no ejector value of 3400 s to approximately 6080 s with an ejector installed.
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