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    • Effects of Primary Inlet Hole Parameters on the Flow and Combustion Characteristics of a Two-Stage Axial Swirl Combustor
    DOI：10.13949/j.cnki.nrjgc.2025.03.005
    Key Words:axial swirl combustor  flow field  combustion efficiency  outlettemperature distribution
    Author NameAffiliationE-mail
    CHEN Chuang* State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China chuangchen13@aliyun.com 
    SHEN Shicheng State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China 2022201149@tju.edu.cn 
    FU Xueqing China North Engine Research Institute， Tianjin 300400， China fuxueqing536@163.com 
    AN Yanzhao* State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China yanzhao_an@tju.edu.cn 
    WANG Yuzhang State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China wyz_2023@tju.edu.cn 
    PEI Yiqiang State Key Laboratory of Engines， Tianjin University， Tianjin 300072， China peiyq@tju.edu.cn 
    ZHANG Yan China North Engine Research Institute， Tianjin 300400， China tjuzhangyan@163.com 
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    Abstract:Simulation was carried out based on the experimental condition of two-stage axial swirl combustor fueled with diesel. The influences of primary hole parameters on flow fields and combustion characteristics of swirl combustor were discussed. The results show that primary recirculation zone area is increased when the distance between the central axis of primary holes and combustor inlet is large， while the change in the diameters of primary holes has a relatively minor effect on the recirculation. The combustion efficiency is obviously reduced to below 90%， when the distance between the central axis of primary holes and combustor inlet is short. But it is slightly influenced by the diameters of primary holes. The outlet temperature distribution fraction is significantly affected by the diameter of the primary hole， with a minimum value of 0.423， while the distance between the central axis of the primary hole and the combustor inlet has little effect on the outlet temperature distribution coefficient， especially on the plane near the combustor outlet.
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