Ap. Weiss et L. Fottner, THE INFLUENCE OF LOAD DISTRIBUTION ON SECONDARY FLOW IN STRAIGHT TURBINE CASCADES, Journal of turbomachinery, 117(1), 1995, pp. 133-141
This paper describes an experimental study of the three-dimensional fl
ow within two highly loaded turbine cascades subjected to the same ove
rall load but different load distributions. Data were obtained using p
neumatic probes, pressure tappings, and a surface flow visualization t
echnique. It is found that the general nature of the flow is similar f
or both cascades. In the exit plane the cascades show different spanwi
se loss distributions. However, the averaged secondary loss is quite s
imilar in this plane. Examining the measurements farther downstream an
d also by comparing the calculated mixed-out values, if becomes clear
that a higher magnitude of secondary loss is generated by the front-lo
aded cascade.