国际燃烧会议被誉为燃烧届的奥林匹克，每两年举办一次，至今已有八十多年的历史，是国际燃烧学界学者交流、学习以及宣传自己工作的一个国际性会议，在领域内具有很高的地位，学界很多先驱都在此会议上进行自己的学术思想、学术成果发表，因此青年学者，研究生都已在该会议上做口头报告并发表PROCI论文为荣。
由于疫情原因，第38届，39届国内的几乎没有学者线下参与，因此本届为时隔六年后全球学者线下开会，大家热情高涨，因此吸引了世界各地的知名学者前来参会。课题组王睿翔论文《Topology characteristics of liquid ammonia swirl spray flame》经过评审，被组委会选择为口头报告，在本届燃烧学会上宣读。
本论文主要针对液氨旋流燃烧过程中的稳定性问题，进行了氨液滴场，燃烧场的同步诊断，主要发现液氨燃烧过程中呈现出的“分区”特点，即液滴区域和燃烧区域中间有明显的隔离现象，说明在这两个区域之间在存在液氨迅速蒸发区域，由于氨特殊的性质，此区域温度梯度较大，并且波动明显，决定着液氨旋流火焰的稳定性。这个现象在本课题组之后的射流喷雾火焰中也被证实。
论文摘要：
In gas turbines, compared to gaseous ammonia, the utilization of liquid ammonia can reduce energy loss and startup time. However, the flash boiling phenomenon and the high latent heat of liquid ammonia makes the spray flame difficult to stabilize. Increasing the preheated air temperature or adding small amount of hydrogen as a piloted fuel are considered as effective methods to enhance the stability. To understand the flame topological structure, simultaneous Mie scattering and planar laser-induced fluorescence of OH (OH-PLIF) techniques are used to visualize the liquid ammonia spray structure and flame region information. Results show that the liquid ammonia swirl spray flame exhibits the flame topological structure of distinct zoning characteristics without overlap, including the droplet zone, the mixing zone, and the flame zone. Increasing the preheated air temperature accelerates the evaporation of liquid ammonia, leading to an increase in the local equivalence ratio and radial flame splitting. At lower air temperature conditions, increasing the hydrogen blending ratio has minimal impact on the flame topological structure. However, at higher temperature conditions, hydrogen blending significantly promotes reactionintensity upstream and reduces the flame lift-off height, which makes the mixing zone smaller. In general, to achieve better flame stability effect, the two factors need to be reasonably matched, which has important reference value for the development of liquid ammonia direct injection gas turbine combustor.
