噴霧群の振動燃焼

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タイトル別名
  • Combustion Oscillation in Oil Mist Firing
  • フンムグン ノ シンドウ ネンショウ

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This paper deals with the unstable combustion of liquid fuel in a combustor. According to the increase of air-fuel ratio in the range larger than stoichiometric one, combustion becomes unstable, combustion noise increases and the pressure and the temperature in the combustor oscillate at a frequency of 20∼50c/s. Moreover, blow-off phenomena are arisen from this unstable combustion. The results obtained are as follows : (1) The frequency of combustion oscillation changes with air-fuel ratio, fuel flow rate and mean drop size of fuel. (2) The amplitudes of pressure and temperature change increase with the increase of air-fuel ratio and fuel flow rate. (3) The flow rates of fuel and atomizing air oscillate in case of combustion oscillation. (4) The mechanism of combustion oscillation is made clear by high speed photography.

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