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首页> 外文会议>US Combustion Meeting; 20070325-28; San Diego,CA(US) >On the controlling mechanisms in multicomponent droplet gasification
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On the controlling mechanisms in multicomponent droplet gasification

机译：多组分液滴气化的控制机理

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摘要

The relative roles of liquid-phase mass diffusional resistance and volatility differential in multicomponent droplet gasification is re-visited, recognizing that the liquid-phase mass diffusivities can be substantially increased as the droplet is progressively heated upon initiation of gasification. Such an increase could substantially weaken the diffusional resistance, hence rendering volatility differential having an increased influence on the gasification sequence. Calculations performed by using realistic and temperature-dependent thermal and mass diffusivities indeed substantiate this influence. In particular, the calculated results agree with the literature experimental data. Further computation was performed for gasification at elevated pressures, recognizing that the liquid boiling point and hence the attainable droplet temperature would increase with increasing pressure, leading to further weakening of the liquid-phase diffusional resistance and hence increased influence of volatility differentials. This possibility was again verified through calculated results, suggesting that volatility differentials could have a stronger influence on multicomponent droplet gasification at high pressures.
机译：重新认识到在多组分液滴气化中液相质量扩散阻力和挥发度差的相对作用，认识到随着液滴在气化开始时逐渐加热，液相质量扩散率可以大大提高。这种增加可能会大大削弱扩散阻力，从而使挥发性差异对气化顺序的影响增加。通过使用实际的和温度相关的热和质量扩散率进行的计算确实证实了这种影响。特别是，计算结果与文献实验数据一致。认识到液体沸点和可达到的液滴温度会随着压力的升高而增加，从而进一步提高了气化的计算能力，从而导致液相扩散阻力的进一步减弱，从而增大了挥发性差异的影响。通过计算结果再次验证了这种可能性，表明挥发性差异可能会对高压下的多组分液滴气化产生更大的影响。

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