Theoretical Researches on Axial-Flow Compressors (Part I)

Abstract

With the development of axial flow compressors for gas turbines, the other flow patterns are investigated in addition to free vortex type, for the purpose of increasing pressure rise in a stage and decreasing the diameter and number of stages. This paper describes the expressions for (1) inlet solid vortex flow pattern, (2) outlet solid vortex flow pattern, (3) mean value solid vortex flow pattern, (4) whirl constant flow pattern, in the case of pressure rise at rotor is constant for all radii. We can obtain arbitrary velocity profils combining the stages having the above described flow pattern and the stages in which pressure rise is not constant at all radii. Finally, an example for the all radii 50% reaction type is presented.