Effect of the inner diameter and Reynolds numer on the recirculation zone in annular jet flow

• Autorzy: Habib Merouane , Rachid Sahnoun , Ismail Drai

Identyfikatory

DOI

10.2478/ijame-2022-0021

• Języki publikacji: EN

Abstrakty

EN

In this paper, we focus on the effect of the inner diameter and Reynolds number on the recirculation zone in an annular jet flow with numerical simulation by resolving the Reynolds-averaged Navier-Stokes equations with the first closed model of turbulence k-epsilon. The annular jet plays an essential role in stabilizing the flame in the burner which is used in many industrial applications. The annular jet is characterized by the inner and outer diameter. In this study, three different inner diameters are adopted with constant width of the annular jet. We adopted also three different values of the Reynolds number show the effect of the Reynolds number on the recirculation zone. The simulation is realized by a CFD code which uses the finite element method. The results obtained from this study are in good agreement with the experimental data. Two recirculation zones are shown; a large recirculation zone at the outlet of the flow and a small recirculation zone just near the injection generated by the annular flow and the inner diameter ;iD it is observed that the size of the recirculation zone increases when the inner diameter increases and the length of the recirculation zone depends only on the inner diameter. This recirculation zone is also affected by the Reynolds number with a very low variation of the recirculation length.

Słowa kluczowe

EN

jet flow; annular jet; recirculation zone

PL

przepływ strumieniowy; strumień pierścieniowy; strefa recyrkulacji

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2022
• Tom: Vol. 27, no. 2
• Strony: 87--97
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr.

Twórcy

autor

Habib Merouane

• Department of Mechanical Engineering, Faculty of Science and Technology University of Mascara, ALGERIA

autor

Rachid Sahnoun

• Department of Mechanical Engineering, Faculty of Science and Technology University of Mascara, ALGERIA

autor

Ismail Drai

• Department of Mechanical Engineering, Faculty of Science and Technology University of Mascara, ALGERIA

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)