单级低速模拟轴流压气机实验台改进设计

为了使单级低速台能够更好地模拟高压压气机后面级流动,采用导叶+静子+转子+静子+导叶的五排叶片布局,适当提高轮毂比,以及采用3D打印树脂叶片,对常规三排叶片单级低速模拟大尺寸轴流压气机实验台进行了改进设计研究,并与四级重复级低速大尺寸压气机实验台的第三级结果进行了对比。结果表明:改型设计的单级低速大尺寸压气机的设计点效率达到了89.1%,流量裕度达到了32.9%,与四级重复级实验结果基本一致,而且实现了基本相似的级间参数分布,比传统单级实验台更接近高压压气机后面级的典型流动,从而可以利用该实验台成本低和周期短的优势,开展更多更深入的关于高压压气机后面级流动机理和设计方法的实验研究。

Optimization design of a single stage low speed simulation axial compressor test facility

In order to obtain a better representation of the rear stage flow field of high pressure compressor, the optimization design of a conventional three-row-blade single stage was performed. A novel five-row-blade configuration (including an inlet guide vane (IGV), an inlet stator (S1), a rotor (R), an outlet stator (S2) and an outlet guide vane(OGV)) was adopted and the hub-to-tip ratio was increased properly. Three-dimensional (3D) printing technique was employed to produce the blades. Experimental results were compared with those of a repeating four-stage large scale low speed axial compressor (LSLSAC,the third stage). It was demonstrated that the efficiency of the redesigned compressor reached 89.1% and the stall margin was 32.9%, which agreed with the repeat stage compressor. Similar inter-stage performance parameters were also achieved. The redesigned test facility had a stronger ability to reproduce the rear stage flow field of high pressure compressor compared with conventional low-speed large scale compressor test facilities. Owing to its advantages of low financial and time costs, the design method has the prospect to be utilized into more compressor rear-stage investigations.