Limit load represents the maximum tangential velocity or blade force that can be generated within a transonic turbine blade. Its accurate prediction is therefore extremely important if the expected thermal efficiency and power output from the turbine is to be obtained. This report presents methods of calculating limit load for typical transonic turbine blading. Comparisons are made between predictions and test data from: (a) two-dimensional stationary cascade and (b) model low pressure turbine with dry steam. Satisfactory agreement is shown between the predictive techniques and the test values of maximum tangential velocity.

This content is only available via PDF.