Analysis of possibilities of increasing a turbulence by throttled axisymmetric stream for a fluid flow inside closed duct

• Autorzy: Judt W. , Bartoszewicz J.

Identyfikatory

DOI

10.5604/01.3001.0012.2466

• Języki publikacji: EN

Abstrakty

EN

Fluid flow through the closed duct is a common phenomenon, which is used in many technical applications. A stream of a fluid is often disturbed by different shapes of elements, which have an effect for a flow and causes the growth of a turbulence. Turbulence rising causes an increase of heat transfer process and eliminates areas of flow stagnation in thermal devices. Article presents methodology and results of research about possibilities of turbulence increasing for a fluid flow inside a closed duct. Authors analysed capabilities of application of an internal stream of a fluid in the axis of the tested duct, in the inlet to analysed construction for mainstream turbulence expanding. An additional stream of a fluid was added into the model by internal, partially throttled pipe, which was clogged by special disc. Contact between the disc and internal pipe generated a small gap, where an additional stream of a fluid was directed. Numerical analysis of a level of turbulence for a fluid flow through analysed duct was realized in ANSYS Fluent environment, as an unsteady simulation with Delayed Detached Eddy Dissipation model of turbulence. Experimental research was realized with constant anemometry measurement method. Results of experimental and numerical analysis show, what part of a fluid inside duct disturbed mainstream of a flow.

Słowa kluczowe

EN

closed duct; turbulence increasing; numerical calculations; fluent

PL

kanał zamknięty; rosnące turbulencje; obliczenia numeryczne

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 1
• Strony: 185--190
• Opis fizyczny: Bibliogr. 3 poz., rys.

Twórcy

autor

Judt W.

• Poznan University of Technology, Chair of Thermal Engineering Piotrowo Street 3, 60-965 Poznan, Poland tel.: [phone], fax: [phone]

autor

Bartoszewicz J.

• Poznan University of Technology, Chair of Thermal Engineering Piotrowo Street 3, 60-965 Poznan, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Boudreau, M., Dumas, G., Veilleux, J.-C., Assessing of ability of the DDES turbulence modelling approach to simulate the wake of a bluff body, Aerospace, Vol. 4, Is. 41, 2017.
• [2] Elsner, J., Turbulencja przepływów, Państwowe Wydawnictwa Naukowe, Warszawa 1987.
• [3] Kunladub, S., Chuwattanakul, V., Kongkaitpaiboon, V., Promthaisong, P., Eiamsa-ard, S., Heat transfer in turbulent tube flow inserted with lose-fit multi-channel twisted tapes as swirl generators, Theoretical & Applied Mechanics Letters, Vol. 7, pp. 372-378, 2017.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).