首页> 外文会议>Proceedings of the Combustion Institute >SHORT-FLAME/QUICK-QUENCH: A UNIQUE ULTRALOW EMISSIONS COMBUSTION CONCEPT FOR GAS TURBINE COMBUSTORS
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SHORT-FLAME/QUICK-QUENCH: A UNIQUE ULTRALOW EMISSIONS COMBUSTION CONCEPT FOR GAS TURBINE COMBUSTORS

机译:短焰/快速熄火:燃气轮机燃烧器的独特超低排放燃烧概念

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This paper describes the emission characteristics of model combustors employing a unique low-emissions gas turbine combustion concept named short-flame/quick-quench combustion. Its potential for ultralow NO_x emissions and complete combustion has previously been successfully demonstrated by testing in an engine. This concept combines lean premixed combustion in a short reaction zone generated by many small flames stabilized on a perforated plate flame holder, and quick quenching of NO_x formation by injecting dilution air immediately downstream of the reaction zone. Multiple tubes penetrate through the flame holder and extend into the combustion chamber, and dilution air is injected from holes on the tubes at an axial position where major combustion reactions have been completed, to achieve both ultralow NO_x emissions and complete combustion. Measurements of gaseous emissions from the model combustors were made for natural gas at combustor inlet air temperatures ranging from 300 to 900°C and pressures of 0.1 to 0.7 MPa. Modulation of combustion and dilution air split resulted in NO_x emissions of 3-4 ppm (corrected at 15% O_2) or 0.3-0.4 EINO_x (g NO_2/kg fuel) over the range of overall equivalence ratios required in simple- and regenerative-cycle gas turbine operations. The NO_x concentrations in parts per million correlated well by the Arrhenius expression with the adiabatic flame temperature in the reaction zone, T_p, over a wide range of pressure, temperature, and air split between combustion and dilution. It is shown that NO_x ∝ exp( - (50 +- 2) x 10~3/RT_p), where R is the universal gas constant in cal/mol K.
机译:本文介绍了采用独特的低排放燃气轮机燃烧概念(短焰/快速骤冷燃烧)的模型燃烧器的排放特性。先前已经通过发动机测试成功证明了其具有超低NO_x排放和完全燃烧的潜力。该概念结合了在短反应区中的稀薄预混燃烧,该燃烧区是由许多稳定在多孔板火焰保持器上的小火焰产生的,并且通过在反应区的下游直接注入稀释空气来快速淬灭NO_x的形成。多个管子穿过火焰保持器并延伸到燃烧室中,稀释空气从已完成主要燃烧反应的轴向位置处的管子孔中注入,从而实现了超低的NO_x排放和完全燃烧。在燃烧器入口空气温度为300至900°C,压力为0.1至0.7 MPa的情况下,对天然气进行了模型燃烧器气体排放的测量。在简单循环和再生循环所需的总当量比范围内,燃烧和稀释空气分流的调节导致NO_x排放量为3-4 ppm(校正为15%O_2)或0.3-0.4 EINO_x(g NO_2 / kg燃料)燃气轮机运行。在很宽的压力,温度以及燃烧和稀释之间的空气分配范围内,通过Arrhenius表达式,反应区中的绝热火焰温度T_p与百万分之几的NO_x浓度相关性很好。结果表明,NO_x ∝ exp(-(50 +-2)x 10〜3 / RT_p),其中R为以cal / mol K为单位的通用气体常数。

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