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针对地面运输用燃气轮机低排放的要求,试验研究了一种双环预混旋流(TAPS)燃烧室在以0号柴油为燃料时的反应特性。结果表明:采用TAPS燃烧室由于空气分配方式的改变,总压恢复系数在0.97以上,高于经典单环燃烧室。由于柴油黏度和燃点的影响,使用柴油为燃料时最低常压点火油气比高于0.05,要比相同结构采用航空煤油为燃料时的点火油气比高,但慢车贫油熄火极限没有明显的变化,维持在0.006~0.008之间。采用压力雾化的预燃级存在燃料混合不均匀的问题,导致燃烧效率只能达到0.99,为要求值的下限,但燃烧室出口温度分布系数小于0.25,达到了所要求的性能指标。由于采用了预混预蒸发燃烧,污染物排放中NO_x的干基体积分数为1.76×10~(-5),明显低于所要求的性能指标,但CO的干基体积分数较高达到了5.02×10~(-4)。综合比较各项性能指标,该燃烧室在点火、贫油熄火、燃烧室出口温度分布和NO_x排放上表现出了一定的优势,但燃烧效率低和CO排放高还是需要解决的问题。
In response to the low emissions requirements of gas turbines for ground transportation, the reaction characteristics of a dual-cycle premixed swirling flow (TAPS) combustor with No 0 diesel fuel were investigated. The results show that the total pressure recovery coefficient of the TAPS combustion chamber is above 0.97, which is higher than the classical single-ring combustion chamber due to the change of the air distribution mode. Due to the influence of diesel viscosity and ignition temperature, the minimum atmospheric pressure gas-oil ratio is higher than 0.05 when using diesel as fuel, and is higher than that of the same structure with aviation kerosene as fuel, but there is no obvious change in the lean limit of slow- Maintain at between 0.006 ~ 0.008. Pre-combustion with pressure atomization has the problem of non-uniform fuel mixture, resulting in combustion efficiency of only 0.99, the lower limit of the required value, but the temperature distribution coefficient of the outlet of the combustion chamber is less than 0.25, to achieve the required performance. Due to the premixed pre-evaporation combustion, the dry basis volume fraction of NO_x in pollutant emissions was 1.76 × 10 ~ (-5), which was obviously lower than the required performance index. However, the dry basis volume fraction of CO reached 5.02 × 10 ~ (-4). After comprehensive comparison of various performance indexes, the combustion chamber showed some advantages in ignition, lean oil flameout, combustion chamber outlet temperature distribution and NO_x emission, but the problems of low combustion efficiency and high CO emission still need to be solved.