Fluid Mechanics and Thermodynamics of Turbomachinery, 5e

Axial-flow Compressors and Fans 159
FIG. 5.8. Mean work done factor in compressors (Howell and Bonham 1950).
(Courtesy of the Institution of Mechanical Engineers.)
FIG. 5.9. Traverse measurements obtained from a 12-stage compressor (Smith 1970).
(Courtesy of the Elsevier Publishing Co.)
Smith also provided curves of the spanwise variation in total temperature, Figure
5.9b, which shows the way losses increase from midpassage towards the annulus walls.
An inspection of this figure shows also that the excess total temperature near the end
walls increases in magnitude and extent as the flow passes through the compressor.
Work on methods of predicting annulus wall boundary layers in turbomachines and