A three-dimensional linear analysis of rotating stall is carried out to clarify the effects of spanwise distribution of cascade characteristics. A semi-actuator disk model of annular cascade is employed. Linear spanwise distributions of the local performance slope are considered to examine the effects of the three-dimensionality in the cascade characteristics. Many eigenvalues were found corresponding to various kinds of radial mode. It was found that the 0th order radial mode is more unstable than higher order modes. It was also found that uneven spanwise distribution of cascade characteristics makes the 0th mode more unstable, and makes the amplitude of the disturbance larger at radial locations where the positive slope of the performance is larger.
JSME international journal. Ser. 1, Solid mechanics, strength of materials
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing