燃料组分差异对贫油熄火边界的影响

In order to promote the diversification of alternative fuels and expand the compositional distribution of aviation fuels, the single-head combustor was adopted to investigate the effects of diesel oil and high-boiling-point Fischer-Tropsch fuel (FT) on the lean blowout of combustor compared with standard jet fuel. The boundaries of lean blowout (LBO) were researched by changing the pressure at the inlet and outlet of the combustor, and the correlation of LBO with physical and chemical properties as well as compositions was discussed. The results showed thatthe LBO of jet fuel was slightly better than that of the alternative fuelsunder the outlet pressure of 220kPa, whilehigh boiling point Fischer-Tropsch fuel's LBO was 5% narrower than that of jet fuel's. At the pressure of 140kPa, the LBO of high boiling point Fischer-Tropsch fuel broadened by 8% than that of jet fuel. The analysis shows that low-boiling alkanes and straight-chain alkanes have a better performance in LBO.