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本文对一高负荷跨音转子采用掠技术进行了改型设计,并通过数值模拟对原型以及前、后掠转子分别进行了流场分析。结果发现掠叶片效率和压比与原型叶片相差不大,但是前掠叶型的失速裕度得到了大幅提高。同时前掠叶型的堵塞流量比原始叶型增大,而后掠叶型却明显减小。叶片采用掠之后一方面前缘位置变化所引起的径向压力输运改变了入口来流条件,另一方面气动掠还直接影响到了叶片吸力面附面层内低能流体的径向输运以及在叶尖区域的集聚,从而使流场内部的激波强度及相对位置明显变化,并最终导致叶片不同叶高载荷分布规律的改变。
In this paper, a modified design of a high-load transonic rotor using grazing technology was carried out, and the flow field analysis of the prototype and the front and back swept rotor were carried out respectively by numerical simulation. The results show that the efficiency and pressure ratio of the swept blades are similar to that of the prototype blades, but the stall margin of the swept swept blades has been greatly improved. At the same time, the clogging flow rate of the former swept leaf type increased than the original leaf type, while the swept leaf type was significantly reduced. The radial pressure transport caused by the change of the leading edge position of the blade after sweeping changes the inlet and outlet conditions. On the other hand, the aerodynamic sweeping directly affects the radial transport of low-energy fluid in the suction surface of the blade, The concentration of the tip region, so that the shock wave intensity and relative position within the flow field significantly change, and eventually lead to leaf leaf height and load distribution changes.