Examination of Oscillating Frequencies Generated by Combustion Oscillation Considering Temperature Distribution in a Combustor Tube Fueled by Natural Gas and Hydrogen Mixture
Examination of Oscillating Frequencies Generated by Combustion Oscillation Considering Temperature Distribution in a Combustor Tube Fueled by Natural Gas and Hydrogen Mixture
复制标题
考虑天然气和氢气混合物燃料的燃烧器管中的温度分布，检查燃烧振荡产生的振荡频率
DOI：
10.1115/pvp2020-21231
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Kaneko Shigehiko
中科院分区：
文献类型：
--
作者：
Uemichi Akane;Mitani Kan;Yamasaki Yudai;Kaneko Shigehiko
进行了以氢气和天然气为燃料的燃烧振荡实验。结果显示，仅在城镇燃气的情况下，振荡频率约为350赫兹，而在含氢燃料的情况下，振荡频率约为200和400赫兹。我们假设由于混合燃料燃烧条件的不同而引起的管内温度分布的改变可能会引起振荡频率的偏移。结果，得到的可能振荡频率不仅在350 Hz左右，而且在200和400 Hz左右。虽然我们在之前的研究中获得了三种可能的振荡频率，但为了阐明燃料混合成分变化的影响，应该考虑更详细的温度分布。本文将相应燃料混合物燃烧管内的实测温度分布与计算温度分布相结合，形成具有代表性的一维温度分布。为了包含详细的温度分布，声学网络模型被划分为足够小的单元来表示温度分布，其中每个单元由传递矩阵连接。然后，考虑温度分布的影响，计算了可能的振荡频率。
A combustion oscillation experiment fueling a mixture of hydrogen and natural gas was performed. The results showed oscillating frequencies of around 350 Hz in the case of the town gas only, whereas oscillating frequencies of around 200 and 400 Hz were observed in the hydrogen-containing fuel case. We hypothesized that the oscillating frequencies shift may occur by changing the temperature-distribution inside the tube, which was caused by different combustion conditions with the fuel mixture. As a result, the possible oscillating frequencies of not only around 350 Hz but also around 200 and 400 Hz were obtained. Although three types of possible oscillating frequencies were obtained in our previous study, more detailed temperature distributions should be considered to clarify the effect of the changing fuel mixture composition. In this paper, representative one-dimensional temperature distributions were formed by the combination of measured and calculated temperature distributions in the combustion tube for the corresponding fuel mixture. To include the detailed temperature distributions, the acoustic network model was divided into enough small elements to express the temperature distributions, where each element was connected by the transfer matrix. Then, the possible oscillating frequencies were calculated, taking account of the influence of the temperature distributions.