Experimental Investigation of Fuel Vaporization on Combustion Efficiency. Quarterly Progress Report, October-December 1979 PDF Download

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Book Description
The initial set of experiments have been performed in the test stand with the basic configuration described in the last progress report. With this experimental set-up, the temperature measurements on the firing tube (and oil evaporation surface) indicated insufficient and a much too low heating rate with the preheat nozzle (0.75 gph). A number of remedies were attempted to increase the gas temperature in the recirculation region around the firing tube. These remedies were intended to increase the flame angle and consisted of various size discs, washers and flame impellers located relative to the nozzle. A qualitative picture of the flow flame-configuration pattern is also shown. These were not successful in increasing the evaporization surface temperature. Moreover sooting was enhanced. To significantly reduce the heat-up time with the preheat nozzle, the contribution from the various heating modes are assessed here. An element of the firing tube and evaporation surface is shown. The various heat transfer modes to this surface with and without vaporization spray are indicated.