The test results show that,for this static cascade,using the aft-loaded profile and curved blade can not only reduce the profile loss,but also weaken the secondary flow.

With the aid of a large database of measured profile losses,including in-house results and recent cases from the open literature,the profile loss predictions of Kacker and Okapuu have been improved.

Further,the impact of boundary layer separation and wake vortices on profile loss were analyzed.

In view of the discrepancy of current loss models of centrifugal compressor,the way of adopting polytropic coefficient instead of adiabatic exponent in the process of calculating parameters of all sections was put forward on the basis of summarizing impeller loss models of centrifugal compressor.

On the basis of summarizing the current ways of performance forecast for centrifugal compressor,put forward the way of adopting polytropic coefficient instead of adiabatic exponent in the process of calculating the compressor s energy loss models and parameters of all sections.

The paper provides a suit of loss models about calculating design and off-design points.

Based on the experimental data of a 99 mm rotor,various losses and loss models of the stator of variable geometry radial inflow turbine(VGT) was analyzed.

This article does focus on the type of loss covered by the unit limitation of liability on the basis of relative provisions of international conventions.