In the previous report, authors confirmed the effects of the mixed ratio O
2/C
2H
2, tip distance and plate thickness to the thermal efficiency of oxy-acetylene flame.
In this report, continuously, the effects of the supplied heat quantity, numbers of nozzle in tip as shown in Fig. 1 and heating time to the thermal efficieney are measured with aforesaid apparatus and method.
The test results revealed that ;
1 The thermal efficiency of oxy-acetylene flame is decreased according to the increase of tip size and heating time, as shown in Fig. 6.
2 The thermal efficiency is increased according to the increase of numbers of nozzle, in case the same heat quantity is supplied, as shown in Fig. 7.
3 In case the heating is done till the center of plate surface, just below the white cone only, is melted, the total heat quantity which was absorbed in plate is decreased according to the increase of tip size and numbers of nozzle in tip.
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