高空低雷诺数二维抗分离叶型研究

在高空、低速、低雷诺数下,进行具有较强抗分离能力的新叶型研究,探索叶型设计的新概念和新方法,并发展相应的低雷诺数压气机叶片二维设计技术是十分关键的。文中进行了低雷诺数条件下二维压气机叶栅流场计算与对比,在探索高空、低速、低雷诺数对压气机叶型性能影响的基础上,以发展适应低雷诺数流动,具有较强抗分离能力的新叶型为最终目标,进行叶型设计新理论和新方法的探索,为最终突破低雷诺数下叶型设计的关键技术提供了可行的途径,并为三维叶片优化造型打下了基础。

Exploring New Ideas and New Methods in 2D Fan/Compressor Cascade Profile Optimization Design for Low Reynolds Number and High Altitude

In section 1 of the full paper,we introduce briefly the traditional ideas and methods in two dimensional cascade profile design.In section 2,we explore,through a numerical example,some new ideas and new methods in 2D cascade profile optimization design for low Reynolds number and high altitude.Section 2 is divided into four subsections.In subsection 2.1,we perform the numerical caculation and constrast of the flow fields of a 2D fan/compressor cascade profile for low Reynolds number.In subsection 2.2,we present the effects of high altitude and low Reynolds number on the performance of the fan/compressor cascade profile.Then we develop a new cascade profile that can maintain the satisfactory flow for low Reynolds number and has the rather strong capability of resisting flow separation.Finally,we use the ground conditions(0 km) and the high altitude of 20 km for low Reynolds number to carry out the optimization design of a cascade profile.In section 3,we summarize three preliminary conlusions as the results of our exploration of new ideas and new methods.