|
|
Vztlaková mechanizace křídla
Rakovský, Kristián ; Weis, Martin (oponent) ; Horák, Marek (vedoucí práce)
Bakalárska práca sa zaoberá problematikou vztlakovej mechanizácie krídla. V práci je uvedený účel vztlakovej mechanizácie, rozdelenie prostriedkov vztlakovej mechanizácie, stručný náhľad do ich histórie a ich bližší popis s uvedením ich výhod, nevýhod a použitia v letectve. Súčasťou práce je taktiež stručná štatistika, ktorá zrovnáva vztlakovú mechanizáciu veľkokapacitných dopravných letúnov.
|
|
| |
|
|
Variation of Strouhal number on iced cable in sub-transitional range
Pospíšil, Stanislav ; Górski, P. ; Kuznetsov, Sergeii ; Tatara, M. ; Marušić, A.
The influence of ice accretion, angle of attack and Reynolds number on the flow field around iced cables of the cable-supported bridges is not clearly understood. The paper presents results of a wind tunnel investigations of Strouhal number of stationary iced cable model of cable-supported bridges. The investigations were carried out in a Climatic Wind Tunnel Laboratory of ITAM. The methodology leading to the experimental icing of the inclined cable model in the climatic section of the laboratory was prepared. For the aerodynamic investigations the iced cable model in a smaller scale was reproduced with combination of photography and 3-D printing procedure. The Strouhal number (St) was determined within the range of the Reynolds number (Re) between 2.4×10^4 and 16.4×10^4, based on the dominant vortex shedding frequency measured in the flow behind the model. The model was orientated at three principal angles of wind attack for each of the Re. Good agreement with the generally reported value in the sub-critical Re range for a circular cylinder was obtained.
|
|
|
Influence of ice accretion at bridge rope on Strouhal number
Pospíšil, Stanislav ; Gorski, P. ; Kuznetsov, Sergeii
The paper is concerned with the method and results of wind tunnel investigations of the/nStrouhal number (St) of a stationary iced cable model of cable-supported bridges with/nrespect to different angles of wind attack. The methodology leading to the experimental/nicing of the inclined cable model was prepared in a climatic section of the laboratory./nThe St values were determined within the range of the Reynolds number (Re) between/n2.4·104 and 16.5·104, based on the dominant vortex shedding frequencies measured in/nthe wake of the model.
|
host ::
RSS.