Aerodynamic drag coefficient over equatorial coastal industrialized and urban areas

Yusup, Yusri

doi:10.1016/j.jweia.2012.07.006

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…If fans are used as a wind source, an averaging time of greater than 90 min is required to stabilize the turbulence spectra at lower dimensionless frequencies, f < 0.01. (Yusup, 2012), increased by 40 to 55% with the VAWT and by < 10% without the VAWT, indicating the transfer of a significant amount of vertical momentum when wind flows through the turbines. This result agrees with the findings of Dabiri (2011) that show VAWTs' ability to extract planform (from the top) kinetic energy.…”

Section: Standard Deviations Of the Wind Component Fluctuations For Tmentioning

confidence: 96%

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Pilot Study on Indoor Flows and Turbulence Statistics of a Vertical Axis Wind Turbine

H’ng¹,

Yusup²,

Khalil³

et al. 2014

MER

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Turbulence statistics were applied to the downwind flow of a Darrieus-type vertical axis wind turbine (VAWT) to provide insights about VAWT micro-flow characteristics. Micro-turbulence measurements of the flow in front of and behind a VAWT were made using a sonic anemometer. Turbulence data for downwind distances of 0.5 m and 2.0 m from the wind source were collected with and without the VAWT, respectively, using a blower (Type 1 flow) and industrial fans (Type 2 flow) as the wind source. The voltage V, generated by the VAWT was recorded every 15 min. Only the center line of the flow was considered. The Type 2 flow induced a constant spectral power at a high dimensionless frequency range of 0.007 < f < 0.04, perhaps due to the fan configuration, which had a larger wind-swept area. The results show an increase in lateral turbulence, σ v , downwind of the VAWT compared to its longitudinal, σ u , and vertical, σ w , counterparts. Using spectral analysis, the VAWT was found to reduce the horizontal (u and v) turbulent component energies in the dimensionless frequency range of 0.003-1. Interesting dip and peak features were observed for Type 1 flow, but only dip features were observed for Type 2 flow in the resulting spectra. Higher wind speeds increased the voltage generated at a rate of 0.5.

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Section: Standard Deviations Of the Wind Component Fluctuations For Tmentioning

confidence: 96%

“…As discussed later, this is a reasonable averaging time to use in this situation because it creates a statistically stationary condition for the momentum fluxes. This averaging time has also been used in micro-meteorological studies of urban areas (Yusup, 2012).…”

Section: Experimental Set-upmentioning

confidence: 99%

Pilot Study on Indoor Flows and Turbulence Statistics of a Vertical Axis Wind Turbine

H’ng¹,

Yusup²,

Khalil³

et al. 2014

MER

Self Cite

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Similarity theory and nocturnal locally scaled turbulence variances in the tropical urban roughness sublayer

Yusup

Anis

2016

Atmospheric Pollution Research

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Aerodynamic performances analysis of supersonic aerofoil

Satheshkumar¹,

Nagarani²

2013

2013 International Conference on Energy Efficient Technologies for Sustainability

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The project is about analyzing the wing leadingedge modifications by leading edge droop which is used for NACA airfoil. The objective of this project is to show that there will be an increase in stalling angle by using droop leading edge modifications and for that Computational Fluid Dynamics (CFD) software, Fluent is used to depict the increase in stalling angle when drooped leading edge is used. Using Leading Edge Drooping, achieved increased in the lift coefficient than the normal airfoil and we have tailored the stall characteristics by using leading-edge droop. And by using leading-edge droop we can successfully increase the stall/departure characteristics.

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Aerodynamic drag coefficient over equatorial coastal industrialized and urban areas

Cited by 4 publications

References 35 publications

Pilot Study on Indoor Flows and Turbulence Statistics of a Vertical Axis Wind Turbine

Pilot Study on Indoor Flows and Turbulence Statistics of a Vertical Axis Wind Turbine

Similarity theory and nocturnal locally scaled turbulence variances in the tropical urban roughness sublayer

Aerodynamic performances analysis of supersonic aerofoil

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