双环预混旋流与单、双环腔燃烧室性能对比

将中心分级的双环预混旋流(TAPS)燃烧室、单环腔燃烧室(SAC)及双环腔燃烧室(DAC)采用相同的扩压器尺寸、外机匣最大直径以及燃烧室出口尺寸,采用相同的数理模型,对TAPS燃烧室,SAC,DAC进行三维数值模拟.对比研究了TAPS燃烧室,SAC,DAC的总压恢复系数、燃烧效率、燃烧室出口温度分布系数、污染排放等性能参数.研究结果表明:采用TAPS燃烧室,可获得比SAC和DAC更高的总压恢复系数及燃烧效率;比SAC和DAC更低的燃烧室出口温度分布系数及NO_x等污染的排放,尤其是设计工况下出口NO_x排放.从研究结果来看中心分级的TAPS燃烧室的技术优势十分明显,是一种很有发展前景的高温升、低污染燃烧室. 

Capability compare of twin annular premixing swirler with the single annular and dual annular combustor

Diffuser,outer case and exit dimensiom kept the same with single annular combustor(SAC)and dual annular combustor(DAC),redesigned the combustor from a single annular structure into twin annular premixing swirler(TAPS)combustor in central classified.Taking the same physical models(including the turbulence,radiation,spray and emission model),three-dimensional reaction flow simulation in TAPS combustor,SAC and DAC were developed in the fluent code.The total-pressure recovery coefficient,combustion efficiency,temperature distribution of the combustor exit and NO_x/CO emission profiles were calculated.Finally,the capability of TAPS combustor,SAC and DAC were campared.The results show that,by using the TAPS combustor,the total-pressure recovery coefficient,combustion efficiency was improved compared with the SAC and DAC,the temperature distribution coefficient of the combustor exit and NO_x emission is lower than SAC and DAC.So the conclusion could be drawed that the technical advantages of TAPS combustor is obvious,and the TAPS combustor is a good high temperature rise and low emission combustor.