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Experimental determination of the hydrodynamic load of the flooded bridge model
Naiser, Dominik ; Hrdlička, Libor (referee) ; Zubík, Pavel (advisor)
The diploma thesis deals with experimental determination of hydrodynamic load on the overflowed bridge deck model. In the first part of the thesis the author describes the analysis of the problem together with the basic physical laws and principles that are used or assumed in the measurement itself. In the second part the author describes the measurements in the laboratory of the Faculty of Civil Engineering and its gradual processing. At the end of the work are described the results of measurement, their comparison with numerical modeling, other authors and their possible use in practice.
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The determination of minimal countercurrent distance of the water surface sensor from the thin-plate V-notch weir.
Kopečná, Monika ; Zubík, Pavel (referee) ; Žoužela, Michal (advisor)
This thesis clarifies the issue of the measuring flows with the help of capacity measurement systems using Q/h characteristics and also describes measuring techniques for determining the water surface level. The various types of measuring weirs and their Q/h characteristics are described in detail. It also mentions the position of the installation of the sensor. The main task is to find a practical minimal countercurrent distance of the water surface sensors used in practice for use with a V-notch weir in the form of experimental measurements in the water management research laboratory at the Department of Water Structures Faculty of Civil Engineering in Brno. The weirs used for this experiment had top angle cutouts of 90°, 53°8´ and 28°4´. The obtained data is evaluated and subsequently the minimal countercurrent distance of the water surface sensor is determined. The thesis also includes recommendations for further research.
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Effect of free surface flow forces on the rectifying element
Höll, Jan ; Sehnal, Jan (referee) ; Zubík, Pavel (advisor)
This diploma thesis deals with the research of the effect of free surface flow forces on the rectifying element and consists of several parts. The first part processes and evaluates the measured values from a physical model. In the next part measurement is checked according to hydraulic laws. In the third part comparison of both methods is created.
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Determination of Q / H characteristic of atypical measuring flume
Boháč, Daniel ; Zubík, Pavel (referee) ; Žoužela, Michal (advisor)
This bachelor’s thesis deals with streamflow measurement with focus on measuring systems using the Q/H characteristic. The thesis includes the description of the commonly used measuring weirs and flumes. The main task of this thesis is a specific project of atypical measuring flume. This flume will become a part of a rigid weir and will measure the minimum residual flow rates. In the Laboratory of Water Management Research of the Institute of Water Structures of the Faculty of Civil Engineering of the Brno University of Technology, the author has done extensive model research. In this research, various variants of the shapes and dimensions of the atypical measuring flume were analysed. The thesis also includes data processing of the said research and evaluation. The result of this work is the choice of the optimal variant of shapes and dimensions of atypical measuring flume and to determine its Q/H characteristic.
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Time evolution of velocity distribution in the specific area of the calibration channel
Kosík, Ondřej ; Žoužela, Michal (referee) ; Zubík, Pavel (advisor)
This bachelor thesis deals with the verification and determination of the degree of reliability of the calibration track. The mean speed values for individual reference speeds, which ranged from 0,0507-1,4036 m•s-1, were measured by LDA. With increasing speed, the mean square deviation also increased, reaching the highest value of 0,0034 m•s-1. The percentage deviation, which is core value for the given measurement, on the other hand, changed inversely with respect to the mean values of the speed and its values ranged from 0,242-0,473 %.
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