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为了更好地对压气机流动进行模拟,在课题组自行开发的结构化有限体积解算器上实现了用于压气机流场计算的混合平面法、谐波平衡法及相滞后法.以NASA Stage 35为例,对3种方法的计算结果进行了比较分析.结果表明:相滞后法的计算精度最高,混合平面法的计算精度最低;相滞后法与半环的双时间推进法结果相近,计算速度提高了20倍;相比混合平面法,谐波平衡法能准确地模拟动静叶间的非定常干涉及进出口参数变化;在谐波阶数达到5阶后,谐波平衡法计算得到的结果不随阶数变化,且与相滞后法的结果基本吻合;混合平面法的计算效率远高于另外两种方法,相滞后法与谐波平衡法在谐波阶数为5阶时的计算效率相当.
In order to simulate the compressor flow well, a hybrid planar method, a harmonic balance method and a phase delay method are implemented on the structured finite volume solver developed by the research group.According to NASA Stage 35 as an example, the results of the three methods are compared and analyzed.The results show that the accuracy of the phase delay method is the highest, and that of the mixed plane method is the lowest.The phase delay method is similar to the half- Compared with the hybrid planar method, the harmonic balance method can accurately simulate the unsteady interference between the moving and static blades and the change of the import and export parameters. After the harmonic order reaches the fifth order, the harmonic balance method calculates The results of mixed phase method are much better than those of the other two methods. The phase lag method and the harmonic balance method when the harmonic order is 5 orders Efficient.