Conference proceeding
Single-camera Time-Resolved Laser-Induced Incandescence Measurements in a RQL Aeroengine Combustor
03/2023
Appears in Aviation Sustainability Center (ASCENT)
Abstract
Understanding and measuring the formation of non-volatile particulate matter is important for minimizing emissions and improving the design of aeroengines. In rich-burn, quick-mix, lean-burn (RQL) combustors, signifcant quantities of soot are formed near the injectors, some of which is later oxidized downsteam. In order to better understand the soot formation dynamics in RQL burners, diagnostics that can measure both soot volume fraction and estimate soot particle sizes are needed. In this work, we describe the design, construction, and control of a high pressure RQL aeroengine combustor that is operated with Jet A fuel. Next, the development and implementation of two-dimensional single-camera time-resolved laser-induced incandescence (TiRe-LII) technique is described. In this technique, a single laser pulse is formed into a sheet and used to heat the soot inside the combustor. Then, a single ultra-high-speed camera is used to capture both the prompt LII signal and the soot incandescence decay over time at up to 10 MHz. By combining these images with a TiRe-LII model that is validated against soot sampling results from a Jet A fame, it is possible to estimate both the primary soot particle size and the soot volume fraction near the fuel injectors. By combining these measurements, a clearer picture of soot formation can be determined for RQL combustion.
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Details
- Title
- Single-camera Time-Resolved Laser-Induced Incandescence Measurements in a RQL Aeroengine Combustor
- Creators
- Russell McGrath (Author)Ezekiel Bugay (Author)Jeremiah Juergensmeyer (Author)Andy X. Zheng (Author)David Wu (Author)Adam Steinberg (Author)Wenting Sun (Author)Yi Chen Mazumdar (Author)
- Academic Unit
- Aviation Sustainability Center (ASCENT); Emissions
- Grants
- 13-C-AJFE-GIT-080, Federal Aviation Administration (United States, Washington) - FAA
- Identifiers
- 99901389805101842
- Language
- English
- Resource Type
- Conference proceeding