小型涡轮平面叶栅试验段设计  

Design of a Small Scall Linear Turbine Cascade Test Section

作　　者：季正鑫 龙启运 祁明旭 杨长茂 Zheng-xin;Ji Qi-yun Long;Ming-xu Qi;Chang-mao Yang(Beijing Institute of Technology)

机构地区：[1]Beijing Institute of Technology

出　　处：《风机技术》2024年第2期17-23,61,共8页Chinese Journal of Turbomachinery

摘　　要：Performance improvement of the high-load transonic turbine is the key method of improving the thrustto-weight ratio or the power density of gas turbine engines. In order to investigate the flow behaviors inside the high load turbine cascades, a linear turbine cascade test section is designed, which enables the Schlieren photography and static pressure measurement along the cascade profile can be conducted. Variable pitch is realized in the test section to achieve different Zweifel coefficients. Due to the capability limitation of the air supplier, the test section is designed to have only5 blade channels with shortened blade height to achieve high Mach number flow conditions. Numerical investigations were carried out to investigate the wall effect and its in fluences on the flow fields inside the test section. The result indicates that the shape of the connecting part of the test section has a significant influence on the flow similarity among different blade passages. With the proper design, a good repetition flow is achieved between neighbored blade passages.

关 键 词：High-load Turbine Linear Cascade Variable Pitch Test Section 

分 类 号：V263.3[航空宇航科学与技术—航空宇航制造工程]