000004284 001__ 4284
000004284 005__ 20141118185755.0
000004284 04107 $$acze
000004284 046__ $$k2005-05-31
000004284 100__ $$aSarkar, Partha P.
000004284 24500 $$aA Laboratory Tornado Simulator: Comparison of Laboratory, Numerical and Full-Scale Measurements

000004284 24630 $$n10.$$pProceedings of the Tenth Americas Conference on Wind Engineering
000004284 260__ $$bAmerican Association for Wind Engineering, 2005
000004284 506__ $$arestricted
000004284 520__ $$2eng$$aA laboratory tornado simulator that can generate a translating vortex has been built for the purpose of studying the interaction of a tornado-like vortex with the built environment such as individual buildings or suburban and urban complexes. The simulator, mounted on a crane to impart translation, operates like a closed-return wind tunnel with an open test section. It has two concentric ducts to circulate the flow between the inside duct that houses the 1.83-m diameter fan and the outside duct with 5.5 m outer diameter and 4.88 m inside diameter to create a tornado-like vortex whose diameter can reach 1.22 m and tangential velocity can reach 33 m/s. Since the primary purpose of the simulator is to assess the windinduced loads on engineered structures, it is important to validate the wind field of the simulated tornado with full-scale data. Doppler on Wheels radar data from the Spencer, South Dakota tornado of 1998 was used for this purpose. Numerical simulations were also performed with Fluent software for assessing the near-ground flow field (less than 50 m) since the Doppler radar data may not be very accurate at those heights. Analyses of the radar data show peak tangential winds occurring at the lowest scan, roughly 20 m above ground level, with a vortex whose core radius increases between 120 m and 200 m above ground, and remains relatively constant above that level. Numerical model data based on the dimensions of the laboratory simulator and laboratory inflow data are generally consistent with the laboratory and radar observations despite some differences. 

000004284 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004284 653__ $$atornado laboratory simulation, flow measurement and comparison, Doppler radar data, tornado-like vortex CFD simulation, loads on tall buildings.

000004284 7112_ $$aTenth Americas Conference on Wind Engineering$$cBaton Rouge, Louisiana (US)$$d2005-05-31 / 2005-06-04$$g10ACWE
000004284 720__ $$aSarkar, Partha P.$$iHaan, Fred L. jr.$$iGallus, William A. jr.$$iLe, Kuai$$iKardell, Ryan$$iWurman, Joshua
000004284 8560_ $$ffischerc@itam.cas.cz
000004284 8564_ $$s295638$$uhttps://invenio.itam.cas.cz/record/4284/files/120-Sarkar.pdf$$yOriginal version of the author's contribution as presented on CD, , paper No. 120.
000004284 962__ $$r4178
000004284 980__ $$aPAPER