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LES simulation of hemispherical dome's aerodynamic characteristics in smooth and turbulence boundary layer flows
https://orcid.org/0000-0003-1138-7506
Abstract Large Eddy Simulation (LES) technique has been adopted in this research to investigate the aerodynamic characteristics of a hemispherical dome immersed in smooth flow and boundary layer flow at a Reynolds number around 2E+06. Accuracy of the numerical simulation result was validated in comparison with previous wind tunnel experiment performed by Cheng and Fu (2010). Results showed that the numerical simulation result agrees fairly well with the experimental one in mean pressure distributions both in smooth and turbulent flows. Regarding the RMS pressure coefficients, the agreement is fairly good for the smooth flow. However, it is rather poor for the turbulent boundary layer. Furthermore, the numerical simulation offers an insight into the characteristics of the flow near the separation point and provides comprehensive understanding for the location of the separation.
Highlights Distributions of mean Cp obtained from CFD and wind tunnel test agree well. The agreement is poor for the fluctuating Cp in the turbulent boundary layer. CFD simulation provides insight into the separation phenomenon on the dome surface. The appropriate grid design for the strong vortex area is necessary. The surface pressure gradient from wind tunnel tests may be an efficient index to identify the separation location.
LES simulation of hemispherical dome's aerodynamic characteristics in smooth and turbulence boundary layer flows
https://orcid.org/0000-0003-1138-7506
Abstract Large Eddy Simulation (LES) technique has been adopted in this research to investigate the aerodynamic characteristics of a hemispherical dome immersed in smooth flow and boundary layer flow at a Reynolds number around 2E+06. Accuracy of the numerical simulation result was validated in comparison with previous wind tunnel experiment performed by Cheng and Fu (2010). Results showed that the numerical simulation result agrees fairly well with the experimental one in mean pressure distributions both in smooth and turbulent flows. Regarding the RMS pressure coefficients, the agreement is fairly good for the smooth flow. However, it is rather poor for the turbulent boundary layer. Furthermore, the numerical simulation offers an insight into the characteristics of the flow near the separation point and provides comprehensive understanding for the location of the separation.
Highlights Distributions of mean Cp obtained from CFD and wind tunnel test agree well. The agreement is poor for the fluctuating Cp in the turbulent boundary layer. CFD simulation provides insight into the separation phenomenon on the dome surface. The appropriate grid design for the strong vortex area is necessary. The surface pressure gradient from wind tunnel tests may be an efficient index to identify the separation location.
LES simulation of hemispherical dome's aerodynamic characteristics in smooth and turbulence boundary layer flows
https://orcid.org/0000-0003-1138-7506
Abstract Large Eddy Simulation (LES) technique has been adopted in this research to investigate the aerodynamic characteristics of a hemispherical dome immersed in smooth flow and boundary layer flow at a Reynolds number around 2E+06. Accuracy of the numerical simulation result was validated in comparison with previous wind tunnel experiment performed by Cheng and Fu (2010). Results showed that the numerical simulation result agrees fairly well with the experimental one in mean pressure distributions both in smooth and turbulent flows. Regarding the RMS pressure coefficients, the agreement is fairly good for the smooth flow. However, it is rather poor for the turbulent boundary layer. Furthermore, the numerical simulation offers an insight into the characteristics of the flow near the separation point and provides comprehensive understanding for the location of the separation.
Highlights Distributions of mean Cp obtained from CFD and wind tunnel test agree well. The agreement is poor for the fluctuating Cp in the turbulent boundary layer. CFD simulation provides insight into the separation phenomenon on the dome surface. The appropriate grid design for the strong vortex area is necessary. The surface pressure gradient from wind tunnel tests may be an efficient index to identify the separation location.
LES simulation of hemispherical dome's aerodynamic characteristics in smooth and turbulence boundary layer flows
Fu, Chung-Lin (author) / Cheng, Chii-Ming (author) / Lo, Yuan-Lung (author) / Cheng, De-Qian (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 144 ; 53-61
2015-01-01
9 pages
Article (Journal)
Electronic Resource
English
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