Numerical Investigations of the Efficiency of Circulation Control in a Compressor Stator
Numerical Investigations of the Efficiency of Circulation Control in a Compressor Stator
复制标题
DOI：
10.1115/1.4003286
复制
发表时间：
2010-10
影响因子：
1.7
通讯作者：
A. Vorreiter;S. Fischer;H. Saathoff;R. Radespiel;J. Seume
中科院分区：
文献类型：
--
作者：
A. Vorreiter;S. Fischer;H. Saathoff;R. Radespiel;J. Seume
翼型主动流动控制在过去已经尝试过，以便增加燃气涡轮机部件中的边界层的容许载荷。本文提出了一种用于高速压气机的主动流动控制静叶，在静叶尾缘附近采用柯恩达表面来抑制附艾耶尔分离。设计目的是减少叶片数量，同时确保与下游转子的良好匹配，使气流转向角保持恒定。本文首先对一个采用循环控制的压气机叶栅进行了数值模拟。附壁面位于翼型吸力面上喷射槽的后面。小的B速率导致与静压上升相关的效率增益。在第二步中，将该结果转移到4级高速研究压缩机，其中在第一定子中应用循环涡轮机。设计方法和初步结果是基于稳态数值计算。这些结果的分析表明，性能优势的概念。对于叶栅和研究压气机或两者，压力增益和效率显示为吹风率和射流功率比的函数。比较是基于考虑功率损失变化的无因次效率进行的。
Airfoil active flow control has been attempted in the past in order to increase the permissible loading of boundary layer s in gas turbine components. The present paper presents a stator with active flow control for a high speed compressor using a Coanda surface near the trailing edge in order to inhibit boundary l ayer separation. The design intent is to reduce the number of vane s while ‐ in order to ensure a good matching with the downstream rotor ‐ the flow turning angle is kept constant. In a first step, numerical simulations of a linear compressor cascade with c irculation control are conducted. The Coanda surface is locat ed behind an injection slot on the airfoil suction side. Small b rates lead to a gain in efficiency associated with a rise in sta tic pressure. In a second step, this result is transferred to a 4- stage high speed research compressor, where the circulation cont rol is applied in the first stator. The design method and the first results are based on steady numerical calculations. The analy sis of these results shows performance benefits of the concept. F or both, the cascade and the research compressor, the pressure gain and efficiency are shown as a function of blowing rate and jet power ratio. The comparison is performed based on a dimensionless efficiency which takes into account the change of po wer loss.