Effects of Streamwise Sinusoidal Flow on the Aerodynamic Characteristics of a Box Girder
Abstract
:1. Introduction
2. Experimental and Numerical Setups
2.1. Experimental Tests
2.2. Numerical Methods
2.2.1. Computational Details
2.2.2. Spatial and Temporal Discretization
2.3. Validations
3. Effects of Streamwise Sinusoidal Flow on Pressure Characteristics
3.1. The Pressure Characteristics
3.2. Streamwise Correlations
3.3. Non-Gaussian Features
4. Effect of Streamwise Sinusoidal Flow on Total Forces
4.1. Mean and RMS Forces
4.2. Frequency Domain Features
5. Effects of Streamwise Sinusoidal Flow on Separated Flow
5.1. Flow Separation and Reattachment
5.2. Wake Characteristics
6. Conclusions
- (1)
- The time-averaged flow separation and mean pressure coefficients of the closed box girder are insensitive to the oscillating frequency and amplitude of the sinusoidal oscillating inflow. However, the characteristics of the sinusoidal oscillating inflow influence the fluctuating pressure coefficients significantly;
- (2)
- The inflow oscillating frequency and amplitude have a significant influence on the fluctuating lift and drag forces. The fluctuating drag forces increase linearly with the oscillating frequency;
- (3)
- The wake vortex shedding is highly correlated to the inflow oscillating frequency and amplitude. There are three significant vortex shedding modes, and more obvious vortex shedding can be observed with higher inflow oscillating frequencies and amplitudes.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Reference | Geometry | Sinusoidal flow | Method | Conclusion |
---|---|---|---|---|
Morison (1950) [8] | cylinder | low frequency | wind tunnel | Morison equation |
Obasaju et al. (1988) [11] | cylinder | low frequency | wind tunnel | flow patterns |
Nomura et al. (2003) [12] | cylinder | low frequency | wind tunnel | aerodynamic force |
Chen et al. (2010) [13] | cylinder | low frequency | CFD | aerodynamic force |
Zhao et al. (2010) [14] | cylinder | low frequency | CFD | flow patterns |
Ma et al. (2013) [16] | box girder | low frequency | wind tunnel | aerodynamic admittance functions |
Wang et al. (2021) [17] | box girder | low frequency | wind tunnel | aerodynamic admittance functions |
Um (m/s) | 0.5; 1.0; 2.0 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
KC | 0.25 | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 | 8.0 | 10.0 | 12.0 |
fu (Hz) | 66.67 | 33.33 | 16.67 | 8.33 | 5.56 | 4.17 | 3.33 | 2.78 | 2.08 | 1.67 | 1.39 |
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Li, H.; Zhang, L.; Wu, B.; Xiao, Z. Effects of Streamwise Sinusoidal Flow on the Aerodynamic Characteristics of a Box Girder. Appl. Sci. 2022, 12, 5341. https://doi.org/10.3390/app12115341
Li H, Zhang L, Wu B, Xiao Z. Effects of Streamwise Sinusoidal Flow on the Aerodynamic Characteristics of a Box Girder. Applied Sciences. 2022; 12(11):5341. https://doi.org/10.3390/app12115341
Chicago/Turabian StyleLi, Haohong, Liangliang Zhang, Bo Wu, and Zhao Xiao. 2022. "Effects of Streamwise Sinusoidal Flow on the Aerodynamic Characteristics of a Box Girder" Applied Sciences 12, no. 11: 5341. https://doi.org/10.3390/app12115341
APA StyleLi, H., Zhang, L., Wu, B., & Xiao, Z. (2022). Effects of Streamwise Sinusoidal Flow on the Aerodynamic Characteristics of a Box Girder. Applied Sciences, 12(11), 5341. https://doi.org/10.3390/app12115341