The design of three-dimensional turbine
blades combined with profiled endwalls
Abstract: This paper describes a novel design for reducing secondary flow in turbines. The
design builds on previous work on non-axisymmetric profiled endwalls by combining them
with three-dimensional blade design. Profiled endwalls have been shown to effectively
reduce secondary flow but have often been used as a ‘retrofit’ application where the blade
design is left unchanged. In the current paper reverse compound lean is used to prepare the
blade row for the application of profiled endwalls. Computational fluid dynamic predictions
ofthe expected performance show benefits over and above those of applying profiled endwalls
to the blade row alone. The paper describes the design of the novel geometry for the so-called
‘Durham Cascade’ and gives predictions of the expected performance.
Keywords: secondary flow, profiled endwalls, turbomachinery, blade design, turbines, nonaxisymmetric
blades combined with profiled endwalls
结合成型端壁的三维涡轮机(透平)叶片设计
Abstract: This paper describes a novel design for reducing secondary flow in turbines.
摘要:本论文描述了关于减少透平二次回流的新颖设计
The design builds on previous work on non-axisymmetric profiled endwalls by combining them
with three-dimensional blade design.
本设计建立在先前非轴对称成型端壁的工作基础上,结合了三维叶片的设计
Profiled endwalls have been shown to effectively reduce secondary flow but have often been used as a ‘retrofit’ application where the blade design is left unchanged.
成型端壁有效地减少了二次回流,但是常常被用作更新应用,叶片设计却未改变。
In the current paper reverse compound lean is used to prepare the blade row for the application of profiled endwalls.
本文中,为了成型端壁的应用,逆弯扭用来装备叶栅。
Computational fluid dynamic predictions of the expected performance show benefits over and above those of applying profiled endwalls to the blade row alone.
流体动力学计算的预测期望性能比单独使用成型端壁的叶栅要好
The paper describes the design of the novel geometry for the so-called
‘Durham Cascade’ and gives predictions of the expected performance.
本文描述了‘Durham 叶栅’的新几何参数的设计并预测了期望性能。
Keywords: secondary flow, profiled endwalls, turbomachinery, blade design, turbines, nonaxisymmetric
关键词: 二次回流 成型端壁 透平机械
叶片设计 透平 非轴对称
摘要:本文叙述减少透平叶片二次回流的新设计(方法)。该方法是根据先前工作,与三元叶片的设计相结合,建立在非轴对称基础上的。翼型端壁曾显示了可有效地减少二次回流,但是,经常被用来作“改型”使用;其间叶片设计保留没变。本论文采用反向复式曲面,为翼型端壁制成叶列。流体动力学计算,推断出预期的性能;结果表明,采用翼型端壁叶列的性能超过单独采用叶列。本文叙述了,所谓“德兰翼栅”的新的几何学设计,并给出预期的性能。
关键词:二次回流,翼型端壁,透平(涡轮)机械,叶片设计,透平(涡轮机),非轴对称