Technical gazette, Vol. 26 No. 3, 2019.
Original scientific paper
https://doi.org/10.17559/TV-20190129032154
Research on Effects of Incidence to Turbine Guide Cascade Aerodynamic Performance
Zi-ming Feng
; School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing high-tech development zone university street No. 99, Daqing, Heilongjiang, China
Rui Sun
orcid.org/0000-0002-3142-3036
; School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing high-tech development zone university street No. 99, Daqing, Heilongjiang Province, China
Wei Cui
; School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing high-tech development zone university street No. 99, Daqing, Heilongjiang, China
Jiangtao Xu
; College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin Engineering University, Harbin, China, 163000
Abstract
When steam turbine set runs, the changes of incidence angle could cause the change of the flow loss in the cascade passages. It was necessary to research the flow performance in steam turbine passages by changing incidence angle. With the help of hydrodynamic software CFX, we could conduct numerical simulations at three incidence angles of 20°, 0°, and -20°, respectively. The computation results indicated that the blades with aft-loading profile had a good adaptation to the incidence angle. After changing incidence angle, the incidence angle affected the distribution of static surface pressure less within most of the scope of pressure surface and suction surface than other location. However, incidence angle −20° would decrease pressure loss within a narrow range, and incidence angle 20° would increase pressure loss.
Keywords
incidence angle; nozzle blade cascade; numerical study; secondary flow; steam turbine
Hrčak ID:
220999
URI
Publication date:
12.6.2019.
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