Abstract
This paper details experimental and numerical studies on the secondary flow losses generated in two types of LPT (Low -Pressure Turbine) cascades. Secondary flow loss in LPT significantly contributes to its overall loss, especially in increased stage loading and high-lift airfoil cases. Hence it becomes more important to understand the secondary flow loss production mechanisms. The purpose of this study is to clarify the detail of secondary flow losses generated in LPT cascade and to investigate effects of load distributions on the secondary flow loss using two loading types (Front Loading vs Mid Loading). This study also investigates effects of change of Reynolds number on the secondary flow loss. Detailed experiments using a 5-hole pitot tube are carried out around endwall regions. In addition, a commercial software, ANSYS CFX is intensively used for the simulation of the flow fields to enhance the understanding of loss mechanism.
