目前叶轮机械气动设计方法多基于定常流动模型，而叶轮机械中转子和静子的相对运动决定了其流动为本质非定常的。如何在设计阶段就能将非定常影响纳入考虑，发展非定常设计体系，是研究人员一直试图解决的问题之一。本项目意图结合先进的非定常计算技术和三维粘性反方法，发展成为非定常反方法，建立叶轮机械非定常设计体系。首先申请者提出了基于谐波平衡法和反方法有机集成的思想，并据此建立非定常反方法的基本理论框架；进而分步研究在多种非定常效应影响下时间平均压力载荷的加载策略；最后考虑依据能够考虑上下游非定常流场影响的“尾迹”匹配理念，优化空间积叠线形式，从而构建非定常叶片设计体系。

Most current turbomachinery aerodynamic design methods are based on steady flow model, however the relative movement between the rotor and the stator in a stage environment determines that the flow in turbomachinery is inherently unsteady. So how to take the unsteady effects into consideration under the design phase is one of the problems pursued by the researchers all the time. In the present project, an attempt is made to combine the advanced unsteady calculation method and the inverse method, so as to formulate an unsteady inverse method and develop an unsteady design system for turbomachines. First an effect integration of the harmonic balance method and the inverse method based on virtual movement is proposed, and the fundamental theory of unsteady design framework can be established. Then loading strategies of time-averaged pressure loading under coupled influences of different unsteady sources will be investigated. Finally according to the so called “wake matching” concept, which can takes upstream and downstream unsteady flow fields in to consideration, an optimized 3D stacking line can be obtained, so that a fully unsteady 3D blade design system can be constructed initially.