周向偏距对串列叶栅气动性能的影响
发布时间：2018-11-14 11:48
【摘要】：周向偏距是压气机串列叶栅设计的一个重要参数,选择合理的周向偏距需要兼顾叶栅设计点和非设计点性能,为此本文采用数值模拟方法,研究五种不同周向偏距的串列叶栅在设计点和近喘点工况下的总体性能和流场细节。研究结果表明,在设计点工况下,增大周向偏距叶栅损失减小,出口气流角随周向偏距的变化相对较小;在近喘点工况下,叶栅损失随着周向偏距的增大先减小后增大,出口气流角随着周向偏距增大而最大有约9°的轴向偏离。因此兼顾压气机设计点和非设计点性能时该叶栅的最佳周向偏距设计值在0.67~0.80之间。
[Abstract]:Circumferential offset is an important parameter in cascade design of compressor. In order to select reasonable circumferential offset, the performance of cascade design point and non-design point should be taken into account. In this paper, numerical simulation method is used. The overall performance and flow field details of five cascades with different circumferential deviations at design point and near panting point were studied. The results show that, at the design point, the loss of the cascade with increasing circumferential offset decreases, and the outlet flow angle changes slightly with the circumferential offset. Under the condition of near panting point, the cascade loss decreases first and then increases with the increase of circumferential deviation, and the outlet flow angle increases with circumferential deviation, and the maximum axial deviation is about 9 掳. Therefore, the optimum circumferential offset design value of the cascade is between 0.67 and 0.80 when the performance of compressor design point and non-design point is taken into account.
【作者单位】： 上海交通大学航空航天学院;
【基金】：国家自然科学基金(No.51576124)
【分类号】：TH45
本文编号：2331068
[Abstract]:Circumferential offset is an important parameter in cascade design of compressor. In order to select reasonable circumferential offset, the performance of cascade design point and non-design point should be taken into account. In this paper, numerical simulation method is used. The overall performance and flow field details of five cascades with different circumferential deviations at design point and near panting point were studied. The results show that, at the design point, the loss of the cascade with increasing circumferential offset decreases, and the outlet flow angle changes slightly with the circumferential offset. Under the condition of near panting point, the cascade loss decreases first and then increases with the increase of circumferential deviation, and the outlet flow angle increases with circumferential deviation, and the maximum axial deviation is about 9 掳. Therefore, the optimum circumferential offset design value of the cascade is between 0.67 and 0.80 when the performance of compressor design point and non-design point is taken into account.
【作者单位】： 上海交通大学航空航天学院;
【基金】：国家自然科学基金(No.51576124)
【分类号】：TH45
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