【摘要】 在暂冲式跨音速平面透平叶栅风洞上对某叶栅进行了吹风试验。通过数值预估实验叶栅流场,提供了流场大体结构,设计了实验方案。为选择压力传感器量程和布置测点位置提供了依据。实验测量得到了设计安装角及变工况下叶片表面压力、叶片表面等熵马赫教及波系结构随叶栅进口气流角的变化,并对叶栅内部及出口流场进行了纹影照相。数值预测与试验结果相比较,在大部分情况下,吻合得很好,说明了计算程序的可靠性。反过来,试验结果又可用于检验和改进N.S方程计算程序。更多还原

【Abstract】 An air blowing experiment is done on a cascade of a pulse trans-sonic plane turbine cascade tunnel. By the numerical prediction of blade flow field, structure of flow field is proposed and the experimental scheme is designed. This offers the basis for selection of pressure sensor and distribution of measuring points. The designed fixing angle, surface pressure of blade under varing working conditions, the iso-entropy Mach number and the variation of waves structure with air intake’s flow angle are obtained through experiments. Photos of internal blade and outlet Sow field are taken. The numerical prediction results are compared with experimental results. They fit well in most cases. The experimental data can be used to verify and improve the N. S equations program.更多还原