ガスタービン燃焼器における噴霧粒径と粒子速度計測

概要

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Droplet size and velocity of fuel spray in a gas-turbine combustor have been measured by Aerometrics PDPA/RSA in order to clear spatial variations of droplets on spray combustion. Distribution of Sauter mean diameter, velocity and volume flux in some cross sections of a combustion chamber were examined in this paper. Those were also compared by changing atomizing air flow in order to estimate the effect of initial Sauter mean diameter. The following results have been obtained. 1) Correlation between droplet size and velocity in the main flow of the injected spray is opposed to that far from the main flow. 2)Sauter mean diameters in combustion field are larger than those without combustion due to preferential vaporization of small droplets. 3) Some droplets exist in the postflame region and at the exit of the combustion chamber. 4) Sauter mean diameters decrease and the evaporation rates of the spray increase intensely with increasing of atomizing air flow rate.
社団法人日本ガスタービン学会の論文
1999-05-20