史磊1,林文俊2,黄晨雷3,马龙1,于满1.前缘缺口型损伤风扇转子叶栅流动特性分析[J].航空发动机,2022,48(5):73-79
前缘缺口型损伤风扇转子叶栅流动特性分析
Analysis of Flow Characteristics of Fan Rotor Cascade with Leading Edge Notch Damage
  
DOI:
中文关键词:  风扇转子  叶型前缘  缺口型损伤  平面叶栅  流动特性  航空发动机
英文关键词:fan rotor  airfoil leading edge  notch damage  cascade  flow characteristics  aeroengine
基金项目:中央高校基本科研业务费(3122018Z001)资助
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史磊1,林文俊2,黄晨雷3,马龙1,于满1 1. 中国民航大学中欧航空工程师学院天津3003002. 国家知识产权局专利局专利审查协作北京中心福建分中心福州350108 3. 中国航发商用航空发动机有限责任公司上海 200241 lshi@cauc.edu.cn 
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中文摘要:
      为了研究风扇转子叶片在遭遇外物损伤后所造成的叶片型面形变对压气机性能的影响,针对前缘遭遇缺口损伤型的压 气机叶型开展数值仿真,分析了其整体气动特性及内部流场细节的变化规律。以某小型大涵道比涡扇发动机风扇转子叶片50% 截面叶型为研究对象建立了叶栅模型,假定叶栅中间截面遭遇了球体正向撞击,并在其前缘形成了深度为1.2%相对弦长、宽度为 2.5%相对叶高的表面缺陷。借助NUMECA Fine/Open软件包对前缘缺口型损伤风扇转子叶片50%截面叶型平面叶栅进行全通道 数值模拟,研究区域共计包含6个叶栅通道,定量分析了损伤前后叶栅的气动特性变化及内部流场结构。结果表明:在来流马赫 数为0.6下,前缘缺口型损伤在全攻角范围内增大了叶型总压损失系数,最大相对增大3.11%;扩散因子在前缘损伤后变大,最多 增大13.5%。
英文摘要:
      In order to study the influence of the blade profile deformation on the compressor performance after encountering the foreign object damage on the fan rotor blade,numerical simulation was carried out for the compressor blade with notch damage at the leading edge, the overall aerodynamic characteristics and the variation details of the internal flow field were analyzed. A cascade model was established based on the 50% span airfoil of the fan blade from a small high bypass ratio turbofan engine. It was assumed that the middle section of the cascade was impacted on the leading edge by a spherical particle and a notch damage with a depth of 1.2% chord length and a width of 2.5% blade height was formed at the leading edge. With the help of NUMECA Fine/Open software package,a full-channel linear cascade numerical simulation of the 50% span fan blade airfoil with leading edge notch damage was carried out. The region investigated includes six cascade passages. The changes of aerodynamic characteristics and internal flow field structure of the cascade before and after damage were analyzed quantitatively. The results show that at Mach number 0.6,the leading edge notch damage increases the total pressure loss co? efficient of the airfoil across the whole range of angle of attack,with the maximum of 3.11%. The diffusion factor increases up to 13.5% af? ter leading edge damage.
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