刘浩,张雷,冀世军,吴文征,李霄琳.叶片难抛光区域粗糙度对压气机性能的影响[J].湖南大学学报:自然科学版,2015,42(8):8~14
叶片难抛光区域粗糙度对压气机性能的影响
Influence of Roughness in Difficult-to-polished Blade Region on the Performance of Compressor
  
DOI:
中文关键词:  压气机  叶片抛光  表面粗糙度  叶顶  叶根倒圆  下端壁
英文关键词:compressor  blade polishing  surface roughness  blade tip  blade fillet  hub
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作者单位
刘浩,张雷,冀世军,吴文征,李霄琳 (1. 吉林大学 机械科学与工程学院吉林 长春1300252. 富奥汽车零部件股份有限公司 研发中心吉林 长春130013) 
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中文摘要:
      研究压气机转子中叶片叶顶、叶根倒圆、下端壁这类难以自动抛光区域的表面粗糙度对转子气动性能的影响规律,旨在为叶片抛光加工表面粗糙度目标的制定提供指导.基于计算流体动力学(CFD)对跨音速转子rotor37进行气动计算,分析了98%阻塞流量工况不同转速下各部位表面粗糙度对转子的损失系数和出口总压的影响规律.结果表明,在设计转速下,叶片各部位的表面粗糙度增加均使转子损失增加,叶顶的表面粗糙度使出口总压升高,而叶根倒圆和下端壁表面粗糙度使出口总压降低;表面粗糙度15 μm是一个转折点,大于15 μm时表面粗糙度对气动性能的影响程度开始变大;下端壁表面粗糙度对性能的影响最大,在60%设计转速下,下端壁表面粗糙度使损失降低,但是在80%和100%设计转速下,则使损失增加.
英文摘要:
      The influence of surface roughness in the difficult-to-polished blade regions, such as blade tip, blade fillet and hub, on the aerodynamic performance of the compressor rotor was investigated in order to define the required roughness in these regions for blade polishing. How the roughness in the above-mentioned regions of the rotor affects pressure loss coefficient and outlet total pressure on conditions of 98% choke mass flow in different design speeds was analyzed with the numerical aerodynamic calculation of rotor 37 based on computational fluid dynamics (CFD) tools. The results show that the rotor losses increase with the roughness in the difficult-to-vlished regions of the blade, and the outlet total pressure increases with the roughness of blade tip but decreases with the roughness of blade fillet and hub. The surface roughness value 15 μm is considered as a turning point, because it affects the aerodynamic performance more significantly when it is greater than 15 μm. The aerodynamic performance is most affected by the hub roughness. The hub roughness reduces the rotor losses at 60% of the design speed, but increases the rotor losses at 80%, 100% of the design speed.
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