Investigation of the exhaust flow of a pulse detonation combustor at different operating conditions based on high-speed schlieren and piv

Mohammad Rezay Haghdoost, Daniel Edgington-Mitchell, Christian Oliver Paschereit, Kilian Oberleithner

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The exhaust flow of a Pulse Detonation Combustor (PDC) is investigated for different operating conditions. The PDC consists of two units, the deflagration to detonation transition section and the exhaust tube with a straight nozzle. High-speed high-resolution schlieren images visualize the shock dynamics downstream of the nozzle. The flow dynamics during one full PDC cycle is examined via high-speed Particle Image Velocimetry. The investigated operating conditions differ in fill-fraction, which is the percentage of the tube filled with a reactive mixture. With increasing fill-fraction, the flow features grow in size and strength as the propagation velocity of the leading shock increases. The blow down process of the PDC is characterized by several exhaust and suction phases. An increase in fill-fraction results in a stronger first exhaust phase, while the subsequent suction and exhaust phases remain almost unaffected.

Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics
ISBN (Print)9781624105784
DOIs
Publication statusPublished - 1 Jan 2019
EventAIAA Scitech Forum 2019 - San Diego, United States of America
Duration: 7 Jan 201911 Jan 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum 2019
CountryUnited States of America
CitySan Diego
Period7/01/1911/01/19

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