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Application of a Channel Design Method to High-solidity Cascades and Tests of an Impulse Cascade with 90° of Turning

出版	National Advisory Committee for Aeronautics, 1952
URL	http://books.google.com.hk/books?id=mOiH13MICRQC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋A technique is developed for the application of a channel design method to the design of high-solidity cascades with prescribed velocity distributions as a function of arc length along the blade-element profile. The technique applies to both incompressible and subsonic linearized compressible (ratio of specific heats equal to -1.0), nonviscous, irrotational, fluid motion. An impulse cascade with 90 degree turning was designed for incompressible flow and was tested at the design angle of attack over a range of downstream Mach number from 0.2 to choke flow. To achieve good efficiency, the cascade was designed for prescribed velocities with maximum allowable blade loading according to limitations imposed by considerations of boundary-layer separation.