investigation of a prototype industrial gas turbine combustor using ...

3. Experimental setups
plied using gas bottles, measured using Coriolis mass flow meters and
controlled using needle valves. The air flow was heated with the same
heating system that was used for the atmospheric setup. The flame inside
the RPL was ignited using a spark plug placed in the bottom of the
RPL. The RPL could be ignited with the igniter for all fuels at all tested
pressures.
Figure 3.6: The connection piece for the high pressure facility. To the
left, the two sections of the connection piece are placed next to each other
and show the distribution holes for cooling of the RPL. To the right, the
two sections are welded together.
The RPL connection piece was mounted to the liner of the high pressure
facility in the plenum (Figure 3.7). The liner, after the burner, had
a square cross section with the dimensions 100×100×135 mm. The liner
was equipped with quartz windows for laser diagnostics. After the liner,
there was a step-contraction to a 60 mm cylindrical section. In this section,
temperature could be measured or emission samples taken. After
the cylindrical section, there was a water cooled pressure regulating valve.
The exhaust gases were then cooled by water sprays and led out to the
atmosphere.
The measurements in the pressurized central burner setup were conducted
with preheated air, at 650 K. The gases tested in this investigation
were the same as in the atmospheric experiments (Table 3.2). The pressures
were 3, 6 and 9 bar.
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