Tandem blade technology has become an effective method to break the load limit of conventional aerodynamic configurations. To expand the application range of tandem blades, the supersonic tandem blade flow characteristic was studied and an optimal design was conducted by using a computational fluid dynamics (CFD) solver, with an inflow Mach number of 1.2. The main conclusions follow: (1) the tandem blade loss is difficult to control because of the complicated flow structures with supersonic inflow; (2) the forward blade loss dominates the tandem blade overall loss in the whole operating conditions; and (3) the tandem blade profile was optimized by considering the aerodynamic interaction between forward and aft blade. The numerical simulation results show that the total pressure loss declines by 20% at the design point, and the incidence range increases by about 0.5°.

中文翻译：

---

跨音速串联转子翼型流动特性分析及优化

串联叶片技术已经成为打破常规空气动力结构负荷极限的有效方法。为了扩大串联叶片的应用范围，研究了超音速串联叶片的流动特性，并使用流入流体马赫数为1.2的计算流体力学（CFD）求解器进行了优化设计。主要结论如下：（1）由于超声速流入的复杂流动结构，使得串联叶片的损失难以控制；（2）在整个操作条件下，前叶片损失占串联叶片总损失的主要部分；（3）通过考虑前，后叶片之间的空气动力学相互作用来优化串联叶片的外形。数值模拟结果表明，总压力损失在设计点下降了20％，