Mesoscale Burner Arrays for Gas-Turbine Reheat Applications

Investigation of NO production and flame structure in plasma enhanced premixed combustion

“…As expected, the discharge generated a significant level of NO, typically 80-100 ppm at a height of 10 mm above the discharge and 10 mm towards the cathode side from the center of the discharge. This amount of NO production is large when compared to that generated by combustion in this meso-scale burner ($10 ppm at an equivalence ratio, / = 0.72) [15]. However, it is noteworthy that the NO concentration resulting from the discharge is highly localized and hence non-uniform, and its spatially burner-averaged level is estimated to be as low as 5 ppm.…”

The role of in situ reforming in plasma enhanced ultra lean premixed methane/air flames

“…A detailed description of this particular meso-scale burner is given in Ref. [18]. The burner flow velocity is determined by measuring the pressure and volume flow rate while the control of equivalence ratio is carried out by use of critical flow orifices.…”

“…1 is a schematic diagram of the experimental setup. A premixed methane/air mixture is delivered to a swirl stabilized mesoscale array burner [18] containing thirty six 2.4 mm diameter swirlers. The diameter of the individual burner elements is 4.5 mm and the overall burner diameter is 44 mm.…”

RP of Si3N4 burner arrays via assembly mould SDM

“…For example, low NO x emissions (less than 10 ppm in dry, fully‐premixed conditions) and a correspondent pressure drop of 6.3 percent in the peak power density condition were achieved. The result of further analysis has provided valuable information on the performance improvements via future design iterations (Lee et al , 2002).…”

“…A novel approach has been proposed to improve the engine efficiency by introducing a reheat combustor between conventional turbine stages, to increase the gas temperature in the secondary stage before the gas expands to the exit conditions (Lee et al , 2002). This concept uses highly distributed, millimeter‐scale (mesoscale) combustion in the reheat burner.…”