高性能高负荷轴流压气机设计参数选取分析

Analysis for Design Parameters of High-performance and Highly Loaded Axial Compressors

高负荷压气机设计参数的选择由于超出了常规负荷压气机设计参数的选择区间,有必要进行系统的分析以确定其关键气动和叶片几何造型参数的选取原则,从而保证其综合性能能够达到较优的状态。本文首先通过数值模拟方法,建立了基于CDA叶型的覆盖高负荷压气机叶型设计参数选择区间的数值数据库,发展了一套高负荷压气机叶型的损失评估模型,并建立了针对高负荷压气机设计参数合理化选取的低维分析方法。在此基础之上,分析了不同负荷水平的压气机基元级关键气动和叶型造型几何参数对基元级性能的影响。重点分析了在确定级负荷水平下,基元级进口预旋、反力度和叶片稠度选择对压气机效率和裕度的影响,并以此为依据初步确定了这些参数在高负荷压气机设计时的合理化选择区间。研究表明,对于超高负荷设计的压气机基元级,静子的设计难度更高,对压气机效率和稳定性的影响更为明显。

Since the selection of design parameters of highly loaded compressor is beyond the range for conventional loaded compressors,it is necessary to carry out systematic analysis to determine the principle how to confirm aerodynamic conditions and blade geometric,so as to ensure that its comprehensive performance can reach a better state.In this paper,the numerical simulation method was used to establish a numerical database based on CDA profile,covering the selection interval of blade profile design parameters for highly loaded compressors,and developed a set of profile loss assessment model for highly loaded compressors,and established a low-dimensional analysis method for rational selection of design parameters for highly loaded compressors.And then,the influence of key aerodynamic and blade profile geometric parameters on the performance of the compressor at different loading levels is analyzed.The effects of inlet flow angle,reaction and blade solidity on compressor efficiency and compressor stall margin were analyzed,and the reasonable selection interval of these parameters in the design of high-load compressor was determined.The results show that the design of stator is more difficult and the influence of stator on compressor efficiency and stability is more obvious.