This paper deals with pressure measurement on the surface of the elliptic cylinder. Aerodynamic properties are not same for different shape of the building. Therefore it is important complex experimental measurement for complicated shape. Aim of the article is to understanding the wind loads on building for various arrangements. Results are external pressure coefficients of elliptic model for various rotations. Conclusion of the experiment is to find optimal and critical wind direction for isolated building. This research will be background for future work of interference effect.
This paper deals with determination of the parameters of simulated boundary layer in newly built Boundary Layer Wind Tunnel (BLWT). Short description of tunnel, measuring devices and possibilities of using of tunnel are mentioned here. All measurements, which were necessary for basic analysis of simulated natural wind, are shortly mentioned. The main part of this paper is devoted to additional measurements, which were necessary for detection of influences of boundary effects in part of the cross-section of tunnel where the calibration of Hot-wire anemometer is usually done. These boundary effects evoke deceleration of the wind velocity in given area. Description of additional measurements and obtained results are presented at the end of this paper.
BLWT STU tunnel, which is currently in test mode, will in its two measuring sections allow to prepare measurements with laminar and turbulent wind flow. The front section will fulfill technical parameters of steady flow for testing sectional models and dynamically similar models. In the rear operating section it is necessary to reproduce correctly the roughness of the earth surface covering different terrain categories and to prepare boundary layer suitable for experimental testing. Article deals with the brief description of the preparation and testing laminar flow and boundary layer for the urban terrain, which was simulated with rough elements and barriers of different heights. The attention is focused in getting get at least 1 meter height of boundary layer, which allows to optimize scale similarity of model.
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