TY - JOUR
T1 - Parametric study on the aerodynamic performance of a ducted-fan rotor using free-form method
AU - Fan, Chengwei
AU - Amankwa Adjei, Richard
AU - Wu, Yadong
AU - Wang, Anjenq
N1 - Funding Information:
The authors gratefully acknowledge and appreciate Mr. Joerg Palluch and Mr. Mike Saroch of FRIENDSHIP SYSTEMS AG for the provision of CAE tool license. Financial support from the Natural Science Foundation of Shanghai (No. 18ZR1418600 ) is greatly acknowledged. We would also like to thank the reviewers for their insightful comments that have helped to improve this paper substantially.
Publisher Copyright:
© 2020 Elsevier Masson SAS
PY - 2020/6
Y1 - 2020/6
N2 - In this paper, the effects of various parameters, especially three engineering parameters (twist, sweep, lean), on aerodynamic and structural performance of the fan blade were investigated. The change of blade geometry was realized by the free-form deformation (FFD) approach, which was more flexible than traditional parametric methods. A coupled iterative loop was used in a multi-objective optimization process considering two operating conditions. Not only the effect of a single parameter, but also the coupled effects of any two of them were studied. From the Design of Experiment (DoE) results, it was found that the twist and sweep have a relatively strong influence on aerodynamic performance compared with the lean. In addition, it's noteworthy that the effect of twist varied at different operating conditions. At a relatively low mass flow rate, an excessive twist caused a sudden drop in the total pressure ratio. Optimization results showed that the maximum blade stress was dominated by the twist, and a backward sweep at mid-span decreased the stress on the blade surface. The design of twist (DoT) and sweep (DoS) provided a significant improvement of total pressure ratio ranging from 5% to 15% approximately throughout the operating range. Although the peak efficiency was increased by about 1.3% for DoT, the strong tip leakage vortex caused a premature rotating instability compared with the baseline design.
AB - In this paper, the effects of various parameters, especially three engineering parameters (twist, sweep, lean), on aerodynamic and structural performance of the fan blade were investigated. The change of blade geometry was realized by the free-form deformation (FFD) approach, which was more flexible than traditional parametric methods. A coupled iterative loop was used in a multi-objective optimization process considering two operating conditions. Not only the effect of a single parameter, but also the coupled effects of any two of them were studied. From the Design of Experiment (DoE) results, it was found that the twist and sweep have a relatively strong influence on aerodynamic performance compared with the lean. In addition, it's noteworthy that the effect of twist varied at different operating conditions. At a relatively low mass flow rate, an excessive twist caused a sudden drop in the total pressure ratio. Optimization results showed that the maximum blade stress was dominated by the twist, and a backward sweep at mid-span decreased the stress on the blade surface. The design of twist (DoT) and sweep (DoS) provided a significant improvement of total pressure ratio ranging from 5% to 15% approximately throughout the operating range. Although the peak efficiency was increased by about 1.3% for DoT, the strong tip leakage vortex caused a premature rotating instability compared with the baseline design.
KW - Blade twist
KW - Free-form deformation
KW - Lean
KW - Multi-objective optimization
KW - Sweep
UR - http://www.scopus.com/inward/record.url?scp=85083902345&partnerID=8YFLogxK
U2 - 10.1016/j.ast.2020.105842
DO - 10.1016/j.ast.2020.105842
M3 - Article
AN - SCOPUS:85083902345
SN - 1270-9638
VL - 101
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
M1 - 105842
ER -