| OCR Text |
Show Burner Testing Several burner designs were attempted in the test apparatus shown in Figure 4. The experimental burners were mostly comprised of high-temperature metal alloys like Inconel and 316 stainless steel. These materials were sufficient for the short-term operation necessary to assess the design and also provide quick turnaround for modifications. Design parameters included the manner in which fuel was vaporized, combustion air swirl velocity and swirl angle, and the degree of fuel and air premix. Operational parameters included fuel input, excess air, and combustion air preheat temperature. Measurements for evaluating performance included C O emissions, pressure drop, emitter temperature, and emitter temperature uniformity. All instrument measurements were acquired and electronically stored using a PC-based data acquisition system running LabView software. Initial tests evaluated the burner under quartz tubes so visual assessment of flame stability and flame shape could be made. Subsequent tests operated an optimized burner in a temperature environment that simulated the prototype device. Additional performance criteria pertained to the long-term operation of the device using liquid fuel in a high-temperature burner and included material life and carbon deposition in the burner. Temperature K Figure 3: COMO simulations of the design • * w 1 _ m »• ; : " ' i 1 11 •™ A <x____K ' Hlte<5 « 9 w' _Bi__^__ f JH|j|;|| i ___ •__•»_-*~ _k _R^_M kdB r- I J-|__r^_W___^__L__J _£__ r^^_i_r^_i HL-f Figure 4: Test facility and instrument schematic |
