Computational Analysis of Rotating Detonation Engine Exhaust Interacting with a Turbine Vane

Stephen P. Lynch, Matthew R. Boggio

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

3 Scopus citations

Abstract

Rotating detonation engines (RDEs) are of interest because of the potential for high thermodynamic efficiency relative to a steady-flow Brayton cycle. In general, RDE combustion may appear as nearly steady flow to the turbomachinery since the detonation wave passing is so rapid. However, this has not been investigated in detail. For this study, Computational Fluid Dynamics (CFD) analyses using unsteady Reynolds Averaged Navier Stokes (RANS) were conducted on the effects of pulsed exhaust generated by a Rotating Detonation Engine (RDE) on a downstream turbine vane. A two-dimensional section of a public first stage turbine vane nominally designed for steady flow, was simulated with an incoming total pressure and temperature wave representative of the outflow of a rotating detonation engine combustor. The wave was modeled as an exponentially decaying pulse, with wave frequency, amplitude, and decay time constant varied to determine the impact on time average and unsteady behaviors in the vane passage. The results indicate that the instantaneous total pressure pulses of a detonation wave can propagate through the vane throat and influence the behavior of the trailing edge vortex shedding, which contributes to higher time-average total pressure loss. Furthermore, the vane surface pressure and convective heat transfer coefficient have much higher unsteadiness levels which could impact vane durability, and the turbine blade incidence angle can fluctuate significantly.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum 2022
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106316
DOIs
StatePublished - 2022
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022 - San Diego, United States
Duration: Jan 3 2022Jan 7 2022

Publication series

NameAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
Country/TerritoryUnited States
CitySan Diego
Period1/3/221/7/22

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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