Projekt

Turbulent Inflow Generator for LES evaluation of wind-pressure for high rise buildings

Udbyder

Vejleder

Sted

København og omegn

At present, the wind engineering toolbox consists of wind-tunnel testing of scaled models, limited full-scale testing, field measurements, and mechanical load/pressure testing. The evolution of computational wind engineering (CWE) based on computational fluid dynamics (CFD) principles are making the numerical evaluation of wind loads a potentially attractive proposition. This is particularly true considering the positive development trends in hardware and software technology, as well as numerical modelling.

The success of application of CFD in aeronautical engineering is very encouraging. Acknowledging the difference between streamlined and bluff body flows, the use of computational fluid dynamics for predicting wind effects in the atmospheric boundary layer appears very promising. This is particularly so considering the recent advances as mentioned above, but also the reliable sub-grid turbulence models and numerical reproduction of inflow turbulence. At this stage of CWE application, however, a systematic validation of CWE models through comparison with wind tunnel experiments shall continue to enhance the confidence and warrant its use for practical applications.

Turbulent inflow generator technique that can be used as inflow boundary condition for LES based on synthesizing divergent-free turbulent velocities. The accuracy of proposed technique to produce turbulent velocities with proper spectra and coherency function must be assessed in comparison with typical atmospheric boundary layer (ABL) flow characteristics obtained from literature. Further, its appropriateness to evaluate wind induced response for tall building is regarded as the outcome to employ the proposed technique as inlet boundary condition for LES of the ABL flow around tall buildings.

The scope of this thesis is to adapt 2-3 different approach for generating the synthetics inflow profiles and evaluate the computational quality of the different methods, required input parameter and quality of the generated profiles.

I samarbejde med

Ramboll

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Kontakt

Virksomhed/organisation

DTU Mekanik

Navn

Jens Honore Walther

Stilling

Professor

Mail

jhw@mek.dtu.dk

Vejleder-info

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Vejleder

Jens Honore Walther

Type

Kandidatspeciale

Kandidatuddannelsen i Design og Innovation

Vejleder

Jens Honore Walther

Type

Kandidatspeciale

Kandidatuddannelsen i Konstruktion og Mekanik

Vejleder

Jens Honore Walther

Type

Kandidatspeciale

Kandidatuddannelsen i Vindenergi

Vejleder

Jens Honore Walther

Type

Kandidatspeciale

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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