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10 items by relevance
1 Conference paper

Velocity spectra

Højstrup, J.

Implementing Agreement for a Programme of Research and Development on Wind Energy Conversion Systems. Annex Xi — 1994, pp. 51-62

Year: 1994

Language: English

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2 Conference paper

Velocity spectra

Højstrup, J.

Year: 1993

Language: English

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3 Journal article

Spectra of Velocity components over Complex Terrain

Panofsky, H. A.; Larko, D.; Lipschut, R.; Stone, G.; Bradley, E. F.; Bowen, Anthony John; et al. (1 more)

Quarterly Journal of the Royal Meteorological Society — 1982, Volume 108, Issue 455, pp. 215-230

is horizontal, and decrease when the flow is uphill, for the longitudinal velocity component only. Since vertical-velocity spectra contain relatively less low wavenumber energy than horizontal-velocity spectra, energetic vertical-velocity fluctuations tend to be in equilibrium with local terrain.

Year: 1982

Language: English

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4 Journal article

Velocity Spectra in the Unstable Planetary Boundary Layer

Højstrup, Jørgen

Journal of the Atmospheric Sciences — 1982, Volume 39, Issue 10, pp. 2239-2248

Models for velocity spectra of all three components in the lower half of the unstable PBL are presented. The model spectra are written as a sum of two parts, nS(n) = A(fi, z/zi)w*2 + B(f, z/zi)u*02, a mixed layer part with a stability dependence, and a surface layer part without stability

Year: 1982

Language: English

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5 Conference paper

Boundary layer heights derived from velocity spectra

Højstrup, J.; Barthelmie, R.J.; Källstrand, B.

Determination of the Mixing Height - Current Progress and Problems. Proceedings — 1997, pp. 27-30

Year: 1997

Language: English

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6 Journal article

Modelling Velocity Spectra in the Lower Part of the Planetary Boundary Layer

Olesen, H.R.; Larsen, Søren Ejling; Højstrup, Jørgen

Boundary-layer Meteorology — 1984, Volume 29, Issue 3, pp. 285-312

Principles used when constructing models for velocity spectra are reviewed. Based upon data from the Kansas and Minnesota experiments, simple spectral models are set up for all velocity components in stable air at low heights, and for the vertical spectrum in unstable air through a larger part

Year: 1984

Language: English

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7 Conference paper

Parameterization of the Low Frequency Part of Spectra of Horizontal Velocity Component in the Stable Surface Boundary Layer

Larsen, Søren Ejling; Højstrup, Jørgen; Olsen, H. R.

Proceeings of the Models of Turbulence and Diffusion in Stably Stratified Regions of the Natural Environment — 1985, pp. 181-204

Year: 1985

Language: English

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8 Journal article

A Simple Model for the Adjustment of Velocity Spectra in Unstable Conditions Downstream of an Abruph Change in Roughness and Heatflux

Højstrup, Jørgen

Boundary-layer Meteorology — 1981, Volume 21, pp. 341-356

Year: 1981

Language: English

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9 Journal article

A simple model for the adjustment of velocity spectra in unstable conditions downstream of an abrupt change in roughness and heat flux

Højstrup, Jørgen

Boundary-layer Meteorology — 1981, Volume 21, Issue 3, pp. 341-356

A simple model for the equilibrium spectra of velocity fluctuations in the unstable surface layer is developed. All three component spectra are written as a sum of two spectra For the horizontal spectra, the two parts scale with % MathType!MTEF!2!1!+-% feaafeart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2

Year: 1981

Language: English

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