叶片厚度偏差对转子性能影响的不确定性分析  

Uncertainty analysis of impact of blade thickness deviation on rotor performance

作　　者：姬田园 楚武利[1] 张振华 陈华寅 JI Tianyuan;CHU Wuli;ZHANG Zhenhua;CHEN Huayin(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]西北工业大学动力与能源学院,西安710129

出　　处：《航空动力学报》2024年第11期170-183,共14页Journal of Aerospace Power

基　　金：国家自然科学基金(51576162);国家科技重大专项(J2019-Ⅰ-0011)。

摘　　要：为研究叶片厚度偏差对转子性能的影响,以Rotor37为研究对象,采用非嵌入式混沌多项式作为不确定性量化方法,量化评估了叶片厚度偏差对转子气动性能和流场结构的不确定性影响。研究发现:对于厚度偏差概率分布为对称分布且均值为0的叶片组,其气动性能的平均水平较原型叶片变化不大,气动参数的波动程度则与厚度偏差分布的标准差呈正相关;加工精度较高时转子性能改变量与厚度偏差之间为强线性相关。同时,叶片吸、压力面厚度偏差对转子气动性能产生的影响存在明显差异,叶片吸力面厚度偏差对叶片等熵效率以及质量流量的影响程度更大,而压力面厚度偏差对转子总压比特性影响更明显,两者对转子性能单独造成的不确定性影响在其共同作用时会部分相互抵消。In order to study the impact of blade thickness deviation on rotor performance,the Rotor37 was taken as the research object and non-intrusive polynomial chaos was used as uncertainty quantification method to evaluate the uncertainty impact of blade thickness deviation on rotor aerodynamic performance and flow field structure.The results showed that for the blade group with symmetric probability distribution of thickness deviation and mean value of 0,the average level of aerodynamic performance almost unchanged compared with the prototype blade,and the fluctuation degree of aerodynamic parameters was positively correlated with the standard deviation of the thickness deviation probability distribution.The linear correlation between rotor performance change and thickness deviation was strong when machining accuracy was higher.In the meantime,the impact of thickness deviation of blade suction and pressure surface on rotor aerodynamic performance was obviously different.The suction surface thickness deviation had a greater impact on isentropic efficiency and mass flow rate,while the thickness deviation of pressure surface had a more obvious impact on the total pressure ratio characteristics of rotor,and the uncertain impacts of these two on rotor performance alone were partially cancelled out when they worked together.

关 键 词：加工偏差 压气机转子 非嵌入式混沌多项式 不确定性量化 气动性能 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]