论文部分内容阅读
为了探究造成叶栅风洞栅前测点处流动不稳定性的主要原因,以某平面叶栅风洞实验段为模型,使用数值模拟技术对叶栅实验器进行全场仿真,考察影响栅前测点处流动不均匀性的主要因素。结果表明,实验器上部角区产生的严重的流动分离会引起栅前测点来流产生大的偏转,通过加装叶片和测点下移的方法使得栅前测点处的流动得到很大改善。
In order to explore the main cause of the instability of flow at the measuring point in front of the grid of wind tunnel in a cascade wind tunnel, a numerical simulation technique was used to simulate the cascade wind tunnel experiment with the experimental section of a flat cascade wind tunnel. The main factor of the flow inhomogeneity at measuring point. The results show that the serious flow separation in the upper corner of the experimental device will lead to a large deflection of the flow from the pre-grid measuring point, and the flow at measuring points in front of the grid is greatly improved by adding the blades and moving the measuring point downwards .