Low KC flow regimes of oscillating sharp edges. II. Hydrodynamic forces

Tao, Longbin; Thiagarajan, Krish

doi:10.1016/s0141-1187(03)00046-4

Cited by 74 publications

(36 citation statements)

References 9 publications

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“…12. As pointed out by Tao and Thiagarajan (2003b), the effects of geometry of the attached disk including t d =D d and D d =D c , are only important with combined effect of KC. Tao and Thiagarajan (2003a, b) further demonstrated that there exist three viscous damping regimes associated with the three vortex shedding modes due to an oscillating cylinder attached with a single disk of different thickness.…”

Section: Influence On Hydrodynamic Dampingmentioning

confidence: 97%

Spacing effects on hydrodynamics of heave plates on offshore structures

Tao

Molin

Scolan

et al. 2007

Journal of Fluids and Structures

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Section: Influence On Hydrodynamic Dampingmentioning

confidence: 97%

Spacing effects on hydrodynamics of heave plates on offshore structures

Tao

Molin

Scolan

et al. 2007

Journal of Fluids and Structures

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“…18), mainly for low KC, for which the [27] model was devised. When performing this operation [14], found a better matching with their own data when dividing the damping by KC 3=4 instead of KC 2=3 .…”

Section: Added Mass and Dampingmentioning

confidence: 88%

“…(14) and (15)). They use as reference value for the denominator the pressure corresponding to the force needed to obtain, in the periodic motion, the maximum acceleration for the added mass plate.…”

Section: Pressure Differencesmentioning

confidence: 94%

See 1 more Smart Citation

Hydrodynamic coefficients and pressure loads on heave plates for semi-submersible floating offshore wind turbines: A comparative analysis using large scale models

López-Pavón

Souto-Iglesias²

2015

Renewable Energy

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a b s t r a c tHydrodynamic forces on heave plates for a semi-submersible floating offshore wind turbine are discussed herein. A model of one of the platform columns has been built. This allows for the fitting of either a plain solid plate or the real heave plate prototype design. The latter is equipped with a vertical flap at its edge. The influence of the flap on the hydrodynamic coefficients is investigated through a results comparison with the plain solid one. The model plate diameter is 1 m, thus becoming, to the authors' knowledge, the largest for which results have been published. Results from experiments, in which added mass and damping coefficients have been measured, are presented. This experimental campaign also comprised the direct measurement of dynamic pressures on both heave plates, a fundamental magnitude for the structural design, which, until now, had not been experimentally explored for this type of system. For comparative reasons, numerical simulations were also conducted following common industry standards, both with a wide-spread frequency domain panel method (WADAM) and a RANS CFD commercial code (ANSYS CFX). Finally, results are compared with literature and consistent non-dimensionalizations are sought, with the aim of making these results useful for preliminary design purposes. The authors believe this research could benefit the offshore wind industry by improving the hydrodynamic design of the concept.

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“…Keulegan Carpenter number Aspect ratio Tao et al (1999) 0.1-0.5 - Tao and Thiagarajan (2003b) 0.00075-0.75 0.00075-1.642 Tao and Cai (2004) 0.15-0.74 0.006-0.0113 Tao and Dray (2008) 0.2-1.2 - of top of the spar platform to measure the heave acceleration time history and the heave displacement was calculated from the heave acceleration. Initial vertical displacement was given on the top center of the spar model to measure the heave natural period and heave damping.…”

Section: Referencesmentioning

confidence: 99%