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在低压涡轮导叶设计中采用三种不同前掠叶型,与原子午型线匹配具有不同分离程度,提出两种子午型线设计方法,采用N-S方程全三维CFD软件对每种方法的多个方案与各种叶型匹配情况下进行数值模拟;研究了大子午扩张涡轮过渡段在不同分离情况下的子午型线优化设计特点。结果表明,通过优化子午型线能够明显提高气动性能,并针对不同分离程度,其提高的限度不同,其子午型线设计的特点也有所不同。
In the design of low-pressure turbine guide vanes, three different types of forward-swept-leaf blades are used, which have different degrees of separation from the meridian-shaped line. Two meridional profile design methods are proposed. NS equations are used for all three-dimensional CFD software for each method The numerical simulation of the meso-meridian line with different leaf profiles is carried out. The optimum design features of the meridional profile line under the condition of different separation are studied. The results show that, by optimizing the meridian profile can significantly improve the aerodynamic performance, and for different levels of separation, the increase of the different limits of its meridian profile design characteristics are also different.