| 张晏通，周安宇，孟德君.强预冷风扇气动设计及数值仿真[J].航空发动机,2025,51(6):26-33 |
| 强预冷风扇气动设计及数值仿真 |
| Aerodynamic Design and Numerical Simulation of a Strongly Pre-Cooled Fan |
| |
| DOI： |
| 中文关键词: 强预冷风扇 气动设计 高通流 1维等熵 前加载叶型 大弯度静子 航空发动机 |
| 英文关键词:strongly pre-cooled fan aerodynamic design high through-flow one-dimensional isentropic fore-loaded profile high-
camber stator aeroengine |
| 基金项目:国防工业重点研究项目资助 |
|
| 摘要点击次数: 2049 |
| 全文下载次数: 453 |
| 中文摘要: |
| 为探究航空发动机强预冷风扇的工作特性、寻求适应宽速域多工况风扇的设计方案，通过理论分析了风扇低换算转速
下高通流能力，利用 1维等熵假设推导了低换算转速工况下风扇末级静子攻角与进口气流角之间的关系，提出前加载大弯度末级
静子设计方法，完成了3级风扇的气动方案设计，采用Numeca数值仿真软件建立了风扇宽速域下的气动仿真。结果表明：全新设
计的3级强预冷风扇各工况效率及喘振裕度均满足风扇设计指标要求；对比相同设计指标常规设计风扇工作特性，强预冷风扇在
55%相对换算转速下堵点相对流量更大，流量-压比特性更优，匹配工作点流量提高了2.25%；数值仿真结果验证了1维等熵推导
的合理性，表明采用前加载大弯度末级静子设计，在“过负”攻角工况下减小损失20%。 |
| 英文摘要: |
| To investigate the operating characteristics of a strongly pre-cooled fan for aeroengines and seek a fan design scheme
capable of operating under various conditions with a wide speed range, this study focuses on achieving high through-flow capacity of the
fan at low corrected speeds through theoretical analysis. By utilizing the one-dimensional isentropic hypothesis, the relationship between
the incidence of the final stage stator vane and the inlet flow angle under low corrected speed conditions was derived. A design method for a
fore-loaded, high-camber profile for the final stage stator vane was proposed. Subsequently, the aerodynamic design of a three-stage fan
was completed, and its performances under a wide speed range were established using the Numeca numerical simulation software. The
simulation results indicate that the newly designed three-stage strongly pre-cooled fan meets the efficiency and surge margin requirements
across all operating conditions. Compared to a conventional fan design with the same design requirements, the strongly pre-cooled fan
exhibits a higher relative flow rate at the 55% relative corrected speed choking point, a superior flow-pressure ratio characteristic, and a
2.25% increase in flow rate at the matching operating point. These numerical simulation results not only validate the rationality of the one-
dimensional isentropic derivation but also demonstrate that the design with fore-loaded, high-camber final stage stator vanes reduces
losses by 20% under the "over-negative" incidence condition. |
| 查看全文 HTML 查看/发表评论 下载PDF阅读器
|