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首页> 外文期刊>Journal of Energy Resources Technology >Influence of Swirl and Primary Zone Airflow Rate on the Emissions and Performance of a Liquid-Fueled Gas Turbine Combustor
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Influence of Swirl and Primary Zone Airflow Rate on the Emissions and Performance of a Liquid-Fueled Gas Turbine Combustor

机译：旋流和主要区域气流率对液体燃气燃气轮机燃烧器排放和性能的影响

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摘要

This paper presents the results of an experimental study on the influence of swirl number (S) and primary zone airflow rate on the temperature, emission indices of the pollutants, and combustion efficiency in an atmospheric pressure liquid-fueled gas turbine (GT) combustor, equipped with a swirling jet air blast atomizer and operated with Jet A1 fuel. Experiments were conducted at three primary zone air flow rates and three swirl numbers (0.49, 0.86, and 1.32). For all the cases, it was found that the NOx emissions were very low ( 2 g/kg of fuel). At all the swirl numbers, an increase in primary zone airflow led to a nonmonotonous variation in CO while minimally affecting the NOx emissions. However, increase in the swirl number generated relatively higher NOx and lower CO owing to higher temperature resulting from efficient combustion caused by a superior fuel-air mixing. Also, the unburnt hydrocarbons (UHC) was quite high at S = 0.49 because of the unmixedness of fuel and air, and zero at S = 0.86 and 1.32. The combustion efficiency was very low (around 60%) at S = 0.49 while almost 100% at S = 0.86 and 1.32. The study conducted demonstrates a significant dependence of emissions and GT performance on the swirl number governed by the convective time scales and the residence time of the combustible mixture in the combustion zone.
机译：本文介绍了对涡旋数和初级区气流率对污染物温度，排放索引的影响的实验研究的结果，以及大气压液 - 燃气燃气轮机（GT）燃烧器中的燃烧效率，配备旋转喷射空气喷射雾化器，并用喷射A1燃料操作。实验在三个主要区域空气流速和三个涡流（0.49,0.86和1.32）进行。对于所有情况，发现NOx排放量非常低（<2g / kg燃料）。在所有漩涡数字中，主要区域气流的增加导致CO的非单调变化，同时最小地影响NOx排放。然而，由于由优异的燃料空气混合引起的有效燃烧产生的更高温度，涡流数产生相对较高的NOx和更低的CO。而且，由于燃料和空气的未激活，燃料和空气的未混合，UNBurnt烃（UHC）非常高，S = 0.86和1.32。燃烧效率在S = 0.49处非常低（约60％），而S = 0.86和1.32则近100％。该研究进行了通过对流时间尺度和可燃混合物在燃烧区中的可燃混合物的停留时间来证明发射和GT性能的显着依赖性。

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