Effects of percentage of blockage and flameholder downstream counterbores on lean combustion limits of premixed, prevaporized propane-air mixture
María A. Bosque Fernández, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Science - 8 pages
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73 percent 85 percent blockage 9 meters ambient conditions blockage and counterbore blockage from 63 blowout equivalence ratios caused the equivalence center hole combustion zone counterbore diameter counterbore sizes counterbored flameholders diameter thru hole different flameholder different percentages EFFECTS OF PERCENTAGE faster mixing rates Figure 11 flame tube combustor Flameholder blockage flameholder configurations flameholder geometry flameholder plates flameholders with counterboring flameholders with different flat plate flame flowmeters fuel flow fuel injector Globe valve grams per second hole and four Hole diameter 1.0 Improved stability increase in percentage Increases in mixture inlet air velocity inlet velocities Lean combustion limits lean stability limits Lewis Research Center limits with inlet measured blowout limits meters per second mixture velocity caused Nine flameholder percent blockage flameholder percentage of blockage percentages of flameholder Performing Organization premixed-prevaporized propane-air mixture propane richer mixtures smaller residence stabilize the flame temperature Thermocouple thru hole diameter Variations of measured velocities for different