NACA Research Memorandums

Abstract

Report presenting an experimental turbine designed for high weight flow per unit frontal area, a high specific work output, a relative critical velocity ratio of 0.82 at the rotor hub inlet, and zero rotor blade suction-surface diffusion. At the equivalent design blade speed and work out put, the brake internal efficiency based on the actual overall total-pressure ratio was 0.889. Results regarding the comparison of overall performance of subject turbine with that of configurations I and II and comparison of rotor blade momentum thickness are provided