TY - GEN
T1 - EVALUATION OF VARIOUS NUMERICAL METHODS FOR BLADE ROW INTERACTION IN TURBOMACHINERY
AU - Liu, Yangwei
AU - Yong, Xiaosong
AU - Tang, Yumeng
N1 - Publisher Copyright:
© 2022 by ASME.
PY - 2022
Y1 - 2022
N2 - The flow within turbomachinery is inherently unsteady, thereby the unsteady rotor-stator interaction usually has a large effect on the performance of multistage turbomachines. However, fully unsteady simulations are still too time-consuming for in the routine design of turbomachinery, thus, the steady simulation with mixing-plane method that neglects the interaction is still widely used. Some reduced-order unsteady methods, such as harmonic balance (HB) method and space-time gradient (STG) method, have been proposed to simulate the unsteady periodic flow for the purpose of reducing CPU time consumption with sufficient accuracy. In this work, four mixing-plane methods, the HB method, and the STG method are implemented into the open source CFL3D solver. Effect of these methods on predicting unsteady rotor-stator interaction are evaluated in two flow cases, including a quasi-three-dimensional radial slice of a turbine stage and a 1.5-stage high-speed axial compressor. Results show that both the high-order HB and STG methods own the similar ability as the conventional unsteady simulation in predicting the wake transmitting from upstream to downstream, while the steady mixing-plane methods fail. Numerical results of the 1.5 stage compressor show that the wake of the first row can reach the third blade row. And this phenomenon can be also clearly captured by HB and STG methods. Fourier analysis method is used to analyze the interaction in different blade rows to evaluate various numerical methods.
AB - The flow within turbomachinery is inherently unsteady, thereby the unsteady rotor-stator interaction usually has a large effect on the performance of multistage turbomachines. However, fully unsteady simulations are still too time-consuming for in the routine design of turbomachinery, thus, the steady simulation with mixing-plane method that neglects the interaction is still widely used. Some reduced-order unsteady methods, such as harmonic balance (HB) method and space-time gradient (STG) method, have been proposed to simulate the unsteady periodic flow for the purpose of reducing CPU time consumption with sufficient accuracy. In this work, four mixing-plane methods, the HB method, and the STG method are implemented into the open source CFL3D solver. Effect of these methods on predicting unsteady rotor-stator interaction are evaluated in two flow cases, including a quasi-three-dimensional radial slice of a turbine stage and a 1.5-stage high-speed axial compressor. Results show that both the high-order HB and STG methods own the similar ability as the conventional unsteady simulation in predicting the wake transmitting from upstream to downstream, while the steady mixing-plane methods fail. Numerical results of the 1.5 stage compressor show that the wake of the first row can reach the third blade row. And this phenomenon can be also clearly captured by HB and STG methods. Fourier analysis method is used to analyze the interaction in different blade rows to evaluate various numerical methods.
KW - Blade row interaction
KW - Harmonic balance method
KW - Mixing-plane method
KW - Multi-stage turbomachinery
KW - Space-time gradient method
KW - Unsteady flow
UR - https://www.scopus.com/pages/publications/85142020467
U2 - 10.1115/GT2022-84388
DO - 10.1115/GT2022-84388
M3 - 会议稿件
AN - SCOPUS:85142020467
T3 - Proceedings of the ASME Turbo Expo
BT - Turbomachinery - Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
Y2 - 13 June 2022 through 17 June 2022
ER -