复合掠弯轴流增压设计技术  

Design technique of swept and bowed axial compressor

作　　者：曹志鹏 王永明 赵龙波 关朝斌 牛潇 陈晨 CAO Zhipeng;WANG Yongming;ZHAO Longbo;GUAN Chaobin;NIU Xiao;CHEN Chen(AECC Gas Turbine Establishment,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《航空学报》2024年第5期317-335,共19页Acta Aeronautica et Astronautica Sinica

基　　金：国家科技重大专项(J2019-I-0021-0020)。

摘　　要：提高增压比是未来涡扇发动机实现低耗油率需求的关键途径,而级数少、重量轻、长度短的高负荷轴流增压系统一直是研究重点。小展弦比复合掠弯能够有效控制超声速流动损失以及大折转角下的流动分离,是高负荷设计技术的重点发展方向。本文在大前掠带箍风扇基础上,开展了高负荷两级风扇超跨声速级间流动匹配研究,发展了全新的小展弦比、三维掠弯设计方法;基于试验结果完成了一维、二维特性模型修正,采用优化方法建立了全工况性能匹配调节规律,并完成了优化调节试验验证。以此为基础,为进一步提高负荷,开展小展弦比串列叶片前段减速增压、后段折转增压概念原理设计和试验验证;运用数值模拟方式进行了动叶自循环吸附验证;完成了低反力度气动布局设计和静叶吸附的试验验证。最后,初步讨论了可变流量Flade叶片构型面临的高效率全超声速动叶设计、环内壁低损失超声速流动控制等技术挑战,以及柔性叶片和智能材料相融合的造型设计方法。To increase the pressure ratio is the key for future fuel-efficient turbofan engines,and the compact lightweight high-capacity axial compression system has always been the focus.Composite swept bending,with a low as⁃pect ratio which can efficiently control the supersonic flow losses and flow separation at substantial turning angles,re⁃mains the core of high-capacity design exploration.Based on a forward-swept rim-driven fan,we develop a whole new design method of low aspect ratio and 3D swept,centering on the alignment of flows in high-capacity two-stage fan su⁃personic segments.The refinement of one-dimensional and two-dimensional characteristic models is accomplished ac⁃cording to test results.Optimization techniques are employed to establish a performance alignment protocol that spans all operational scenarios,effectively verified through empirical experiments.To further elevate performance,the study pioneers the concept design and experimental verification of low aspect ratio cascaded blade front-stage deceleration compression and rear-stage turning compression.Validation through numerical simulations confirmed the dynamic blade adsorption within a self-recirculation system.Ultimately,the paper discusses the challenges in designing highly efficient,fully supersonic dynamic blades,especially within variable-flow Flade configurations.It also explores the complex management of low-loss supersonic flow along the annular inner wall and the potential integration of flexible blades and smart materials in shape design methodologies.

关 键 词：小展弦比 复合掠弯 串列叶片 自循环吸附 低反力度 Flade叶片 柔性叶片 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程]