Reduction methods of secondary flow losses in stator blades: numerical and experimantal study

Arkady Zaryankin; Andrey Rogalev; Vladimir Kindra; Valentina Khudyakova; Nikolay Bychkov

doi:10.29008/ETC2017-158

12^th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2017-158

Main Topic:

Axial Turbines

https://doi.org/10.29008/ETC2017-158

Authors

Arkady Zaryankin - Moscow Power Engineering Institute (MPEI, National Research University)
Andrey Rogalev - Moscow Power Engineering Institute (MPEI, National Research University)
Vladimir Kindra - Moscow Power Engineering Institute (MPEI, National Research University)
Valentina Khudyakova - Moscow Power Engineering Institute (MPEI, National Research University)
Nikolay Bychkov - Moscow Power Engineering Institute (MPEI, National Research University)

Abstract

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.