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附面层吸除对带间隙的高负荷压气机叶栅流动特性影响的实验研究

ISSN号：0253-231X
期刊名称：工程热物理学报
时间：2013
页码：1645-1648
分类：TK474.7[动力工程及工程热物理—动力机械及工程]
作者机构：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001
相关基金：国家自然科学基金（No.51206035）;国家自然科学基金创新研究群体项目（No.51121004）
相关项目：附面层吸除抑制压气机内流动分离的机制及控制策略优化研究

关键词：高负荷压气机, 平面叶栅, 附面层吸除, 间隙, 流动特性, highly-loaded compressor, plane cascade, boundary layer suction, clearance, flow char- acteristic

中文摘要：

将附面层吸除技术应用于带间隙的高负荷压气机叶栅中，并在低速平面叶栅风洞里，实验研究了附面层吸除对带间隙的高负荷压气机叶栅流动特性的影响。实验采用五孔气动探针测量了叶栅出口截面参数，得到了该截面的二次流速度矢量分布，并对叶栅壁面进行了墨迹流动显示。结果表明，采用恰当的附面层吸除设置可以大幅改善流动，降低损失；在吸力面附近和间隙内采用附面层吸除（本文的方案1、2和4）都将削弱间隙泄漏流动的动能，从而影响吸力面再附线和端壁分离线的长度和位置，达到对相应区域三维流动分离的控制，并大幅降低总损失，其中方案1的损失下降达到20．8％。

英文摘要：

Boundary layer suction is applied to stator cascade with clearance in a highly-loaded compressor. In a low-speed plane cascade wind tunnel, effects of boundary layer suction on the flow characteristic in a highly-loaded compressor cascade with stator clearance were studied. The exit section aerodynamic parameters were measured by five-hole aerodynamic probe, and the distributions of the exit secondary flow vector were obtained. Also, the ink-trace flow visualizations on the cascade surface and lower endwall were performed to show the boundary layer development. The results show that three-dimensional separated flow can be greatly improved and flow loss was decreased when boundary layer suction was adopted appropriately. Boundary layer suction was applied to the regions of low endwall which is near suction surface of blade and in the gap （case 1, case 2 and case 4 in this paper）. Thus, the kinetic energy of the leakage flow got weakened and then the length and position of suction surface＇s reattachment line and endwall separation line were influenced. In the corresponding region, three-dimensional separated flow got in control. As a consequence, the total loss was greatly decreased, especially case I＇s loss declined by 20.8%.