Variation in Convective and Radiative Heat Transfer with Reynolds Number and Temperature in a Backward-Facing Step Combustor

Jennifer Colborn, Jacqueline O’Connor

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

1 Scopus citations

Abstract

Flow fields in gas turbine combustors have a wide variety of flow features near the combustor liner, including recirculation, shear layer separation and impingement, and boundary-layer development. As a result, modeling and predicting the heat transfer to the liner is challenging. The current work seeks to investigate the relative contributions of convective and radiative heat transfer to combustor liners using a backward-facing step combustor. Backward-facing step flows have many features relevant to gas turbines in a two-dimensional geometry, allowing for simpler modeling and easier instrumentation. Reynolds number, air temperature, and temperature of the combustor floor were varied to determine the impact of each parameter on the heat transfer through the different combustor zones: the recirculation, impingement, and recovery zones. Using a heat flux sensor and a radiometer, the total and radiative heat flux in these different zones was measured, respectively. Total heat flux was much higher than radiative heat flux, indicating the importance of convection heat transfer at these conditions. Increases in air and plate temperature increased both total and radiative heat transfer. Additionally, the highest heat flux was observed in the impingement zone and the lowest heat transfer was usually observed in the recirculation zone.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum and Exposition, 2023
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106996
DOIs
StatePublished - 2023
EventAIAA SciTech Forum and Exposition, 2023 - Orlando, United States
Duration: Jan 23 2023Jan 27 2023

Publication series

NameAIAA SciTech Forum and Exposition, 2023

Conference

ConferenceAIAA SciTech Forum and Exposition, 2023
Country/TerritoryUnited States
CityOrlando
Period1/23/231/27/23

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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