马赫角与马赫数关系的点源推导法

本文建立了压强扰动波的点状波源模型,阐述了压强扰动波的传播机理,写出了扰动源所满足的波动方程及其推迟势的解.并采用点源的坐标变换法导出超声速物体产生的马赫波的马赫角与马赫数所满足的关系式.

马赫角与马赫数关系的简洁推导

根据物理学的理论，建立出了超声速小扰动传播的波动方程中与相互作用力相对应的项．采用频谱分析法得到了速度势的付里叶变换式，由此证明了超声速物体产生的马赫波的马赫角与马赫数所满足的关系式，并可得到与实验相符合的激波特性．

Influences of attack angle and mach number on aerodynamic characters of typical sections of extra-long blade in a steam turbine

On super-sonic or trans-sonic planar cascade wind tunnel of free jet intermittent type, wind blowing experiments were performed on the typical sections of stator and rotor blades in the last stage of ultra-ultra-critical steam turbine with extra-long blade of 1200mm. The influences of attack angle and Mach number on the aerodynamic performances of these sections of the blade profiles were verified, and their operating ranges were also specified.