VELOCITY, TEMPERATURE, AND SPECIES CHARACTERISTICS OF THE FLOW IN A GAS-TURBINE COMBUSTOR

The isothermal and combusting flow characteristics of a model can-type gas-turbine combustor are reported. In isothermal flow a laser-Doppler velocimeter was used to measure the longitudinal and tangential velocity characteristics, and the mean concentration of a tracer of helium gas, injected through the fueling device, was used to obtain the mixture fraction distribution. In combusting flow, with propane as fuel, the velocimeter measured density weighted velocity characteristics, thin digitally compensated bare-wire thermocouples measured unweighted temperature characteristics, and a sampling probe transported gas samples to various instruments which measured near density weighted concentrations of O//2, UHC, H//2, CO//2, CO, and NO//x.