基于NIPC的非轴对称安装角不确定性分析  

Uncertainty analysis of non-axisymmetric stagger angle based on NIPC

作　　者：庄皓琬 曹传军 王琰 滕金芳[2] 朱铭敏[2] 羌晓青[2] Haowan ZHUANG;Chuanjun CAO;Yan WANG;Jinfang TENG;Mingmin ZHU;Xiaoqing QIANG(AECC Commercial Aircraft Engine CO.,LTD,Shanghai 200241,China;School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]中国航发商用航空发动机有限责任公司,上海200241 [2]上海交通大学航空航天学院,上海200240

出　　处：《航空学报》2024年第19期66-82,共17页Acta Aeronautica et Astronautica Sinica

基　　金：国家科技重大专项(2017-Ⅱ-0004-0017);上海市教委专项(2023科技02-7);中央高校基本科研业务费专项资金。

摘　　要：为评估叶片非轴对称安装角分布对压气机气动性能的影响,发展了一种基于非嵌入式多项式混沌法的不确定性量化方法。对具有非轴对称安装角的8通道高压压气机转子气动性能进行了不确定性量化分析,将转子性能变化定量地归因于安装角平均值变化和非均匀性的影响。结果表明,设计点处质量流量和等熵效率主要受到安装角非均匀性影响,占比分别达到65.6%和71.8%,压比则均等地受安装角平均值和非均匀性的影响。在小流量点,安装角非均匀性主要导致了质量流量和总压比的减小,占比分别达到88.2%和66.2%,等熵效率则均等地受安装角平均值和非均匀性的影响。等熵效率径向分布表明,20%以下叶高的等熵效率不确定性主要由安装角平均值变化引入,而30%左右叶高的等熵效率主要受非均匀性影响。对极端方案的性能及流场分析表明,在小流量下非轴对称安装角分布主要影响50%叶高以下的叶片等熵效率分布情况。An uncertainty quantification method based on the non-intrusive polynomial chaos is developed to assess the impacts of non-axisymmetric stagger angle distribution on the aerodynamic performance of compressors.Uncertainty quantification is carried out to analyze the aerodynamic performance of an eight-passage high-pressure compressor rotor with non-axisymmetric stagger angles.The changes of the rotor performance are quantificationally attributed to the variation of the average stagger angle and the nonuniformity.The results show that the mass flow rate and isentropic efficiency at the design point are mainly affected by the nonuniformity,which accounts for 65.6% and 71.8%,respectively,while the pressure ratio is evenly influenced by the average stagger angle and nonuniformity.At the small mass flow point,nonuniformity mainly leads to the decrease of mass flow rate and total pressure ratio,which account for 88.2% and 66.2%,respectively,while the isentropic efficiency is evenly influenced by the average stagger angle and nonuniformity.The radial distribution of isentropic efficiency shows that the uncertainty in isentropic efficiency of radial position below 20% span is mainly caused by the change of the average stagger angle,while the isentropic efficiency at about 30% span is mainly affected by the nonuniformity.The performance and flow field analysis of the extreme cases show that the non-axisymmetric stagger angle distribution mainly affects the isentropic efficiency below 50% span at the small flow rate.

关 键 词：非轴对称 安装角 压气机 气动性能 不确定性量化 

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]