| Summary: | 碩士 === 國立中興大學 === 機械工程學系 === 86 === ABSTRACT The purpose of this project is to investigate the
effects of area and deep of a flame hole for Burner Heads. The
performance of combustion for study are lifting flame, flash
back, yellow tip and so on. According to the above performance
of combustion, the effect of area and deep of a flame hole with
Burner Heads are study. Also, the photographs of flame with
various parameters are investigated to judge the performance of
combustion for Burner Heads. We also want to find the reasons
and determine the des In order to control the heat input, the
chosen fuels in this experiment are C3H8 and C4H10. The deep of
a flame hole is classify into five ranks, such as 2mm, 4mm, 6mm,
8mm, and 10mm.The area of a flame hole is classify into three
ranks, such as 6.09mm2, 5.58 mm2, 4.59 mm2 .In the test of heat
efficiency, the fuel pressure is among 230 mmH2O to 330mmH2O.
From the experimental results show that the better desirable
combustion range for the deep of a flame hole is located between
4mm to 6mm. In the same heat load per unit flame hole area, the
primary air ratio is increased with the increased of per unit
flame hole area. The better combustion efficiency of per flame
hole area is located at 5-6 Kcal/mm2-hr.Keywords： Heat Input ,
Lifting flame , Yellow Tip , Flash Back.
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