基于四象限法的跨声速压气机非设计点损失分析

基于流线曲率法发展了一种适用于跨声速压气机性能预测的高精度模型,对最小损失攻角及非设计点损失预测模型进行了修正.提出了一种非设计点损失分析方法——四象限法,结合该方法对跨声速压气机的损失构成进行了重新定义,对不同工况的损失特点开展了深入分析,在一定程度上揭示了跨声速压气机的损失分布和增长规律.采用新发展的模型对某高负荷跨声速转子进行了详细的计算,并与实验数据进行对比.结果表明,发展的性能预测模型和损失分析方法能够较为可靠地预测全流量工况下跨声速转子的总体性能与气动参数沿展向的分布,为跨声速压气机的特性预测提供了新的思路,具有较强的借鉴意义和工程实用价值.

Off-Design Performance Prediction in a Transonic Axial Compressor Using Four-Quadrant-Analysis

Abstract： Highly accurate performance prediction models based on the streamline curvature method for the through-flow analysis of transonic compressors was developed, of which the minimum loss incidence and off-design loss prediction model were modified. In addition, four-quadrant -analysis, an original method for off-design loss analysis, was proposed to redefine the composite of transonic compressor loss, to make a further exploration on the characteristic of loss at multiple operating conditions, and to reveal the loss distribution and growth law of transonic compressors to a certain extent. Detailed calculations of a highly loaded transonic compressor rotor with the newly developed model was conducted. The results show that the newly developed model and the four-quadrant-analysis method can reliably predict the overall performance and spanwise distribution of aerodynamic parameters at both design and off design operating conditions, providing a new idea for off-design performance prediction. In general, the newly developed model and analysis method can be of great service to engineering.