12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics
This paper examines the perspective design solutions for the secondary flows intensity reduction in the root and peripheral areas of the vane cascade. Increase of the aerodynamic efficiency is achieved by the special finning of internal shroud surface of the vane passage with curvilinear fins having a small height. A study was conducted to analyze the different types of finning on the basis of three-dimensional simulation (CFD). It considers variations with different number, height and shape of used curvilinear fins. In the process of optimization, the best case, which allows to reduce the secondary flow losses by 10-15 %, was obtained. Experimental studies of two vane cascade models were carried out on the aerodynamic test bench. First model was a vane base-type; second model was based on the optimal geometry obtained according to the results of three-dimensional simulation. Experimental studies make possible to confirm the proposed solution efficiency.