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首页> 外文期刊>Propulsion and Power Research >Investigating the effect of blade sweep and lean in one stage of an industrial gas turbine?s transonic compressor
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Investigating the effect of blade sweep and lean in one stage of an industrial gas turbine?s transonic compressor

机译：在工业燃气轮机跨音速压缩机的一个阶段研究叶片扫掠和倾斜的影响

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摘要

In this paper, the simultaneous effects of the sweep and lean of the blades in one stage of a transonic compressor on its performance have been investigated. Then, with the help of numerical solution, fluid flows over these two modified geometries generated from the original sample were analyzed. Considering the applied constraints, the two generated rotor geometries have different geometrical characteristics; so that in rotor No. 1, the blade has a backward sweep and it is less affected by lean, while in the modified rotor No. 2, the blade has a forward sweep and it is more affected by lean. In the first sample, it is observed that the stage efficiency increases by 0.5% for operating design, while the stall margin reduces, and the chocking mass flow rate diminishes by 1.5%. Also regarding the second modified blade, the results indicate that the stall margin increases, the choking flow rate at the nominal rotational speed of the stage increases by 0.18% and the stage efficiency increases by 1%. The comparison of numerical results also shows that, in the first modified rotor, the pressure ratio of the stage diminishes by 0.01%; while in the second sample, the pressure ratio of the stage increases by the same amount. These results were then compared with the experimental results, showing a good agreement.
机译：在本文中，研究了跨音速压缩机一级叶片的扫掠和倾斜对其性能的同时影响。然后，借助数值解，分析了从原始样本生成的这两个修改的几何形状上的流体流动。考虑到所施加的约束，两个生成的转子几何形状具有不同的几何特性。因此，在1号转子中，叶片具有向后掠角，并且较少受到倾斜的影响;而在改进型2号转子中，叶片具有向前掠掠度，并且更多地受到倾斜的影响。在第一个样本中，可以观察到操作设计的载物台效率提高了0.5％，而失速裕度却降低了，而塞孔质量流率却降低了1.5％。同样对于第二改进叶片，结果表明失速裕度增加，在级的标称转速下的节流流量增加0.18％，而级效率增加1％。数值结果的比较还表明，在第一改进型转子中，级的压力比减小了0.01％;而第二级的压力比减小了0.01％。在第二个样品中，样品台的压力比增加相同的量。然后将这些结果与实验结果进行比较，显示出很好的一致性。

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