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首页> 外文会议>ASME turbo expo >DYNAMIC ADAPTATION OF AERODYNAMIC FLAME STABILIZATION OF A PREMIX SWIRL BURNER TO FUEL REACTIVITY USING FUEL MOMENTUM
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DYNAMIC ADAPTATION OF AERODYNAMIC FLAME STABILIZATION OF A PREMIX SWIRL BURNER TO FUEL REACTIVITY USING FUEL MOMENTUM

机译：燃油动量使前混合旋流燃烧器的气动火焰稳定对燃油反应性的动态适应

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Due to the expected increase in available fuel gas variants in the future and the interest in independence from a specific fuel, fuel flexible combustion systems are required for future gas turbine applications. Changing the fuel used for lean premixed combustion can lead to serious reliability problems in gas turbine engines caused by the different physical and chemical properties of these gases. A new innovative approach to reach efficient, safe and low-emissions operation for fuels like natural gas, syntheses gas and hydrogen with the same burner is presented in this paper. The basic idea is to use the additionally available fuel momentum of highly reactive gases stemming from their lower Wobbe index (lower volumetric heating value and density) compared to lowly reactive fuels. Using fuel momentum opens the opportunity to influence the vortex dynamics of swirl burners designed for lowly reactive gases in a favorable way for proper flame stabilization of highly reactive fuels without changing the hardware geometry. The investigations presented in the paper cover the development of the optimum basic aerodynamics of the burner and the determination of the potential of the fuel momentum in water channel experiments using particle image velocimetry (PIV). The results show that a proper usage of the fuel momentum has enough potential to adjust the flow field to the different fuels and their corresponding flame behavior. As the main challenge is to reach flashback safe fuel flexible burner operation, the main focus of the study lies on avoiding combustion induced vortex breakdown (CIVB). The mixing quality of the resulting injection strategy is determined applying laser induced fluorescence (LIF) in water channel tests. Additional•Address all correspondence to this author.OH* chemiluminescence and flashback measurements in an atmospheric combustion test rig confirm the water channel results for CH_4, CH4/H2 mixtures, H_2 with N_2 dilution and pure H_2 combustion. They also indicate a large operating window between flashback and lean blow out and show expected NO_X emission levels. In summary, it is shown for a conical four slot swirl generator geometry that the proposed concept of using the fuel momentum for tuning of the vortex dynamics allows aerodynamic flame stabilization for different fuels in the same burner.
机译：由于未来可燃气体变型的预期增加以及对独立于特定燃料的兴趣，未来的燃气轮机应用需要燃料柔性燃烧系统。改变用于稀薄预混燃烧的燃料可能会导致燃气涡轮发动机出现严重的可靠性问题，这是由这些气体的不同物理和化学性质引起的。本文提出了一种新的创新方法，可在同一燃烧器上实现天然气，合成气和氢气等燃料的高效，安全和低排放运行。基本思想是使用高反应性气体的附加动量，该动量源于其与低反应性燃料相比较低的沃泊指数（较低的体积热值和密度）。利用燃料动量可以以有利的方式影响为低反应性气体设计的旋流燃烧器的旋涡动力学，从而在不改变硬件几何形状的情况下适当地稳定高反应性燃料的火焰。本文介绍的研究内容涵盖了燃烧器的最佳基本空气动力学的发展以及使用粒子图像测速仪（PIV）在水道实验中确定燃料动量的潜力。结果表明，正确使用燃料动量具有足够的潜力来调整流场以适应不同的燃料及其相应的火焰行为。由于主要的挑战是要实现闪回安全的燃料灵活的燃烧器运行，因此研究的主要重点在于避免燃烧引起的涡流破坏（CIVB）。在水通道测试中，使用激光诱导荧光（LIF）来确定最终注入策略的混合质量。额外的 •解决所有与该作者的往来信件。 在大气燃烧试验台上进行的OH *化学发光和反闪测量结果确认了CH_4，CH4 / H2混合物，N_2稀释的H_2和纯H_2燃烧的水通道结果。它们还表明在回火和稀薄喷出之间有一个较大的运行窗口，并显示出预期的NO_X排放水平。总而言之，对于锥形四槽涡旋发生器的几何形状表明，使用燃料动量来调节涡旋动力学的所提出的概念允许同一燃烧器中的不同燃料的空气动力学火焰稳定化。

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