Mixing of Multiple Jets with a Confined Subsonic Crossflow: Part III--The Effects of Air Preheat and Number of Orifices on Flow and Emissions in an RQL Mixing Section

摘要: Summary This study was motivated by a goal to understand the mixing and emissions in Rich-burn/Quick-mix/Lean-burn (RQL) combustor scheme that has been proposed minimize formation of oxides nitrogen (NO x ) gas turbine combustors. The reported herein reacting jet-in-crossflow experiment at atmospheric pressure. jets were injected from perimeter cylindrical duct through round-hole orifices into fuel-rich mainstream flow. number investigated this gave over- optimum under-penetrating jet-to-mainstream momentum-flux ratio J = 57. size individual decreased as increased maintain constant total area; mass-flow MR 2.5. experiments focused on effects inlet air preheat conducted facility provided capability for independent variation jet main temperature. found have significant effect distributions species, but very little overall NO