为研究静叶弯、扭、掠联合造型对流场结构的影响，以某高压透平首级叶片为研究对象，借助计算流体力学与正交优化方法，基于动静叶最佳匹配原则（即对于每种静叶构型，动叶都进行了相应的扭转规律变化，使得动静叶气动性能处于最佳匹配状态），研究了静叶不同复合构型方式对流场结构的影响。结果表明：在合理的静叶弯曲规律下，静叶扭转改型对透平性能有较大影响，掠改型对透平性能影响有限；在一定的扭转规律下，对静叶进行掠改型对轮周效率的影响较小，仅后掠改型会提高透平的轮周效率；对弯扭掠静叶匹配扭动叶进行联合优化，得到的最佳透平的轮周效率为87.12%，与原始透平相比，轮周效率提高了2.09%。

To study the influence of stator blades bending, twisting and sweeping combined modeling on the flow field structure, this paper took first stage blade of a high pressure turbine as the research object, using computational fluid dynamics (CFD) and the orthogonal optimization method, based on the best matching principle of stator and rotor blades (i.e. for each kind of stator blade configuration, the rotor blade carried out the corresponding twisting rule changes, making the stator and rotor blades aerodynamic performance in the best matching state), the influence of different composite configurations of stator blades on the flow field structure was studied. The results show that under the reasonable bending law of stator blades, the twist modification of stator blades has a great influence on turbine performance, while the sweep modification has a limited influence on turbine performance; under a certain twisting law, the sweepback modification of stator blades has little effect on the turbine wheel efficiency, and only the sweep modification can improve the turbine wheel efficiency; the joint optimization of the bending, twisting and sweeping stator blade matched with the twisting rotor blade shows that the optimal turbine has a wheel efficiency of 87.12%, which is increased by 2.09% compared with the original turbine.

TK472

国家科技重大专项（J2019-II-0010-0030Y2019-Ⅰ-0002-0003）