Abstract

The effect of the velocity distribution at the inlet to blade cascades on the kinetic energy of secondary flows is treated on the basis of a simple mathematical model of an ideal fluid flow. The kinetic energy of secondary flow in reaction turbine blades is found to be very small, compared with that in impulse and compressor blades. The influence of blade spacing is also considered. By comparison with experimental data and with practical experience, the present results demonstrate the importance of separation of the three-dimensional, viscous fluid flow in blade cascades of finite length.

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