摘要
用单斜丝详细测量了单转子压气机设计状态和近失速状态转子出口的三维素流流场。结果表明，设计状态叶尖泄漏涡和端壁附面层的掺混是造成尖部流动损失、气流阻塞和亲流脉动的主要原因。近失速状态流动三维性和非定常性较强；尖部吸力面角区轴向速度最低、相对动能损失最大；吸力面附面层径向潜移、叶尖吸力面角区低能团周向潜移及其输运的低能物质在尖部通道中部与叶尖泄漏流、泄漏涡、刮削涡发生掺混，造成尖部大范围的高损失区；根部和尖部吸力面阻面层局部发生分离。
Detailed measurements of three-dimensional turbulellt flow field at the exit of an axial-flow compressor were made in both design and near stall conditions. The flow structurewas surveyed using single-slant hot wire probe. In design condition, substantial blockage,loss and turbulence mainly exist in the tip mid- passage, wake and the corner between thesuction surface and the hub, and the tip leakage vortex exists in the mid passage at the exit,where the turbulent level is the highest. When the mass flow reduces, the flow becomes moreturbulent and three-dimensional, resulting in more fiow mixing. In near stall condition, theradial migration of the blade suction surface bollndary layer and the tangential migrationof the endwall flow are notable, which prompt the flow miring among the leakage flow, thethickened casing boundary layer and the developed suction surface boundary layer at the tip,while fiow separations of the boundary layer on the suction surface occur at 0.2 span and 0.8span.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1997年第2期153-158,共6页
Journal of Engineering Thermophysics
基金
国家攀登计划资助
关键词
压气机
转子
三维
紊流
流场
three-dimensional turbulent flow field, compressor, rotor
