通过数值模拟对Stage35和某3.5级轴流压气机进行了缩尺模化，在保证相对叶尖间隙相同条件下研究不同缩尺比例的雷诺数效应，并通过3个典型雷诺数修正公式，对各缩尺条件下的单级和多级压气机性能进行预测。结果表明：随着缩尺比例减小，压气机特性线向左下方移动，在小缩尺比例下性能恶化程度增加。对于峰值效率和其对应的相对流量，Stage35在0.5缩尺比下较原型分别下降了0.95%和0.34%，在0.1缩尺比下分别下降5.75%和2.32%；3.5级轴流压气机在0.5缩尺比下较原型分别下降0.79%和0.22%，在0.1缩尺比下分别下降3.2%和1.2%。Dietmann&Casey修正公式对轴流压机性能预测的精确度较高且适用性强，对于单级和多级均有良好的修正效果，当缩尺比例大于0.2时，相对修正误差均小于1%。

Scale modeling study was carried out on Stage35 and a 3.5stage axial compressor by numerical simulation.The Reynolds number effects of different scale proportions were studied under the same condition of ensuring the relative blade tip clearance,and three typical Reynolds number correction formulas were adopted to predict the performance of singlestage and multistage compressors under various scale conditions.The results show that with the reduction of the scale ratio,the compressor characteristic line moves to the lower left.With a small scale ratio,the degree of performance deterioration increases.For the peak efficiency and its corresponding relative flow rate,the Stage35 decreased by 0.95% and 0.34% respectively compared to the prototype at a scale ratio of 0.5,and by 5.75% and 2.32% respectively at a scale ratio of 0.1.The 3.5stage axial compressor is reduced by 0.79% and 0.22% respectively compared with the prototype at a scale ratio of 0.5,and by 3.2% and 1.2% respectively at a scale ratio of 0.1.The Dietmann&Casey correction formula has high accuracy and strong applicability for the performance prediction of axial flow compressor.It has a good correction effect for both singlestage and multistage.When the scale ratio is greater than 0.2,the relative correction errors are less than 1%.

TK474.8+1

国家科技重大专项（2017-II-0006-0019）