Abstract
The mixing of jet air into hot, fuel-rich products of a gas-turbine primary zone is a critical step in staged combustion.Often referred to as quick quench, themixingoccurs instead with chemical conversion and substantial heat release. An experiment has been designed to simulate and study this process. The geometry is a cross ow con ned in a cylindrical duct with a sidewall injection of jets issuing from round holes. A specially designed reactor, operating on propane, presents a uniformmixture to a module containing jet-air-injection ori ces that can be varied in geometry. Temperature and species concentrations of O2 , CO2, CO, and HC are obtained upstream, downstream, and within ori ce planes. From this information,penetration of the jet, the spatial extent of chemical reaction, and mixing can be deduced. Results are presented for a mixing module containing 10 round holes that is operated at a momentum- ux ratio of 57 and a jet-to-mainstreammass- ow ratio of 2.5.
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