An atmospheric combustor model with optical access for
confined, non-premixed swirl-stabilized flames was developed
in order to investigate the combustion behaviour of gas turbine
flames fired with low-caloric syngases.
The applied measuring techniques are Particle Image
Velocimetry (PIV) for cold aerodynamic analysis, IR
thermometry in open flame conditions, thermocouple traverses
and global emissions analyzer in confined flame conditions.
Two different fuels were chosen: propane and a synthetic
mixture of CH4, CO, CO2, H2 having a composition typical of
a gas from wood pyrolysis. Thermal powers between ∼5 kW
and ∼20 kW were obtained with two different air flow rates and
equivalence ratio varied in the range φ = 0.2-1.0.
The experimental results constitute a database for the
validation of numerical combustion models. Preliminary
numerical analysis was carried out with STAR-CD software
package.
