Large-Eddy Simulation of Turbulent Combustion in Multi Combustors for L30A Gas Turbine Engine
Large-Eddy Simulation of Turbulent Combustion in Multi Combustors for L30A Gas Turbine Engine
复制标题
L30A燃气轮机多燃烧室湍流燃烧大涡模拟
DOI：
10.1115/gt2015-42545
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
R. Kurose
中科院分区：
文献类型：
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作者：
K. Hirano;Yoshiharu Nonaka;Y. Kinoshita;Masaya Muto;R. Kurose
在设计燃烧室时，应采用数值分析来有效地预测不同的性能，如火焰温度、排放和燃烧稳定性。然而，即使使用数值分析，也不能通过研究单个燃烧室来解决一些问题，因为在实际发动机中，多个燃烧室之间发生相互作用。因此，为了评估实际燃烧室中的详细现象，在任何数值分析中都应该考虑所有燃烧室之间的相互作用。另一方面，这种类型的分析需要大量的计算成本。在这里，采用火焰/进步变量的方法大涡模拟应用于工业燃烧室的数值分析。本研究中使用的燃烧室是川崎重工业株式会社的L30 A。计算是在RIKEN高级计算科学研究所的超级计算机（称为“K计算机”）上进行的。模拟了L30 A发动机中的所有燃烧室（从压气机出口到涡轮机入口），包括燃油歧管。该发动机有八个通过燃料歧管和压缩空气壳体单元连接的罐式燃烧器。元素总数约为1.4亿。每个燃烧室的流型在所有罐中是相似的。来自主燃烧器的旋流由辅助燃烧器形成并加速。在辅助燃烧器之前存在高温区域。充分模拟了实际燃烧室与其它燃烧室筒相互作用时的流场和温度分布。空气的质量流率和燃料的质量流率对于每个罐均匀分布。因此，每个罐的出口温差也非常小。Copyright © 2015 by ASME
When designing a combustor, numerical analysis should be used to effectively predict different performances, such as flame temperature, emission, and combustion stability. However, even with the use of numerical analysis, several problems cannot be solved by investigating single combustors because, in an actual engine, interactions occur between multiple combustors. Therefore, to evaluate the detailed phenomenon in an actual combustor, the interactions between all combustors should be considered in any numerical analysis. On the other hand, a huge amount of computational cost is required for this type of analysis. Here a large-eddy simulation employing a flamelet/progress variable approach is applied to the numerical analysis of industrial combustors. The combustor used for this study is the L30A from Kawasaki Heavy Industries, Ltd. Computations are conducted with a supercomputer (referred to as the “K-computer”) in the RIKEN Advanced Institute for Computational Science. All combustors in the L30A engine (from the compressor outlet to the turbine inlet) are simulated, including the fuel manifold. This engine has eight can combustors that are connected through the fuel manifold and compressed air housing unit. The total number of elements is approximately 140 million. The flow patterns for each combustor are similar in all cans. A swirling flow from the main burner is formed and accelerated by the supplemental burner. There is a high-temperature region before the supplemental burner. The flow field and temperature distribution in an actual combustor interacting with other combustor cans are simulated adequately. The mass flow rate of the air and those of the fuels are distributed equally for each can. Therefore, the outlet temperature difference for each can is also very small.Copyright © 2015 by ASME