微型燃气轮机燃油燃烧室燃烧特性的模化试验研究

Experimental Study of the Modeling of the Combustion Characteristics of a Micro Gas Turbine Oil-fired Combustor

基于模化试验方法,对设计的100kW级微型燃气轮机燃油燃烧室在额定工况下的性能以及在保持微型燃气轮机燃烧室出口排气温度不变的情况下,改变进口空气温度对燃烧室燃烧特性的影响进行了研究。结果表明,燃烧室燃烧效率达到99%以上,总压恢复系数达到94.5%,出口温度最大不均匀度低于20%,NOx排放指标低于9g/kg,火焰筒壁面温度分布均匀。此外,随着燃烧室进口温度的升高,燃烧效率增大,出口温度最大不均匀度减少,CO和UHC的排放指标明显降低,但总压恢复系数有所降低,NOx排放指标有所升高。

On the basis of modeling test methods,a study was conducted of the performance of a 100 kW class micro gas turbine oil-fired combustor at the rated operating condition. Also the influence of the inlet air temperature change on the combustion characteristics of the combustor was studied under the condition of maintaining its outlet exhaust temperature unchanged. It has been found that the combustion efficiency of the combustor can reach more than 99%,and the total pressure recovery coefficient will amount to 94.5% with the maximal unevenness of the outlet temperature being less than 20% and NOx emission index being below 9 g/kg. The burner liner wall surface temperature will assume a uniform distribution. In addition,with an increase of the inlet temperature of the combustor and enhancement of the combustion efficiency,the maximal outlet temperature non-uniformity will decrease and the emission indexes of CO and UHC (unburned hydrogen carbon),conspicuously drop. The total pressure recovery coefficient,however,will somewhat decrease and the NOx emission index,somehow increase.