Abstract

The main results of VTI’s investigations into low-emission combustors for gas-turbine units (GTU) are presented. In recent years, the combustion of a premixed fuel-air mixture (FAM) in a swirling flow in a limited space has been under development for this purpose to attain more complete combustion, stable fluctuation-free operation of a combustor in a wide range of parameters, and compliance with environmental protection requirements. To solve the problems encountered in this field, a procedure has been developed for assessing the effect of temperature in the combustion zone, flow velocity, combustor pressure, and other factors on the combustion stability. A review is presented of a comprehensive approach employed by VTI’s specialists to study the processes in combustors using numerical and experimental methods enabling them to cut down the cost and time of activities on development of low-emission combustors. For example, a relationship is presented between the numerically estimated quality of the produced fuel-air mixture and the experimental nitrogen oxide concentrations. A design parameter relating the process conditions in a flame tube with the vibration combustion amplitude is proposed. The experiments demonstrated a good correlation of the proposed parameter with measured pressure fluctuation amplitude. Of real interest are the presented examples of changes in the velocity and temperature fields with an increase in the working pressure, which should be considered in designing and bench testing the combustor. The low-emission combustors (LEC) developed for large- and medium-power GTUs are presented. The potential for scaling the combustors for other GTUs is examined.

中文翻译：

---

用于发电 GTU 的低排放燃烧器的开发

摘要

介绍了 VTI 对燃气轮机装置 (GTU) 低排放燃烧器的研究的主要结果。近年来，为了使燃烧器在大范围内燃烧更完全、稳定无波动运行，在有限空间内以旋流形式燃烧预混燃料空气混合物（FAM）得到了发展。参数，符合环保要求。为了解决该领域中遇到的问题，已经开发了一种程序来评估燃烧区温度、流速、燃烧室压力和其他因素对燃烧稳定性的影响。介绍了 VTI 专家采用的综合方法来研究燃烧器中的过程，使用数值和实验方法使他们能够减少开发低排放燃烧器活动的成本和时间。例如，给出了所产生的燃料空气混合物的数值估计质量与实验氮氧化物浓度之间的关系。提出了将火焰管中的工艺条件与振动燃烧幅度相关联的设计参数。实验证明所提出的参数与测量的压力波动幅度具有良好的相关性。真正有趣的是所呈现的速度和温度场随着工作压力的增加而变化的例子，在设计和台架试验燃烧器时应考虑这一点。介绍了为大中功率 GTU 开发的低排放燃烧室 (LEC)。检查了缩放其他 GTU 燃烧器的潜力。