Hlavní stránka > Výsledky hledání: keywords:"heated surface"
Hledej:
Tipy pro vyhledávaní :: Rozšířené hledání
Hledej ve sbírkách:
Seřadit podle: Zobrazit výsledky: Výstupní formát:
Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Proposal for an electro/fluidic transducer based on wall-jet separation from a heated curved surface
 Tesař, Václav
Transducers for converting electric input signals into a change of flow rate in a fluidic device are increasing in importance – and yet there is no fully satisfactory design solution. Standard two-stage approach is to perform in the first stage a conversion into a motion of a movable (or deformable) mechanical component. Then in the second stage the mechanical effect acts on the fluid flow. Mechanical components complicate manufacturing, have tendency to get stuck or worn – or, in the case of elastic support, to endanger reliability by breakages (e.g. due to material fatigue). Their inertia limits the frequency range. Author proposes an apparently not yet applied idea of transducer containing no moving or deformed parts. The electric input heats a surface to which an air jet is attached, causing its separation. Preliminary experiments show that relatively small heating suffices to change substantially the flowfield — and the reduction of the attachment wall to a thin metal foil can make the frequency range of responses quite acceptable.
Úplný záznam
Induced fluid rotation and bistable fluidic turn-down valves (a survey)
 Tesař, Václav
Paper discusses engineering applications of mutual interaction between fluid flow rotation in adjacent cavitiesthat communicate via a window through which is transferred moment momentum. The transfer may be merely byshear stress on the interface or enhanced by some flow crossing the boundary which is in the window. The first case of zero-time-mean mass transport through the window has led to methods of measuring the wall shear stress – a quantity of high importance in theoretical fluid mechanics – by measuring the speed of induced rotation in an adjacent vortex chamber. The case with momentum transfer by a non-zero flow became the starting point of development of fluidic valves combining two properties otherwise mutually incompatible: bistability on one side and turning-down the flow on the other side.
Úplný záznam

Chcete být upozorněni, pokud se objeví nové záznamy odpovídající tomuto dotazu?
Přihlásit se k odběru RSS.
Digitální repozitář :: Hledej :: Nový záznam :: Personalizace :: Nápověda
Powered by Invenio v1.1.2
Spravuje admin.invenio@techlib.cz
Tato stránka je dostupná také v následujících jazycích:
Česky  English