Influence of nozzle geometry on fluid flow parameters

• Autorzy: Penkov I. , Aleksandrov D.

Identyfikatory

DOI

10.2478/ijame-2020-0060

• Języki publikacji: EN

Abstrakty

EN

The article discusses ways for optimization of a standard nozzle cup design to achieve a narrower paint flow. The analysis of a standard nozzle cup shows that distribution of air pressure is critically uneven both along the nozzle axis and in the radial direction. A decrease in pressure is about 45% at the distance of 2 mm from the front surface of the nozzle cup. Air pressure decreases about 40% at the distance of 2 mm from the nozzle axis in the radial direction. Air velocity decreases about 52% at the distance of 4 mm from nozzle surface but then the velocity stabilizes and decreases is about 59% at the distance of 10 mm from the nozzle surface in comparison to its magnitude on the nozzle surface. Six extra holes and a circular rim were added to the standard nozzle cup to obtain paint stream as narrow as possible. Also was modified inner surface of the nuzzle cup. Totally, four different components were analysed. The results show that with increasing the nozzle cone by fifteen or more degrees, the pressure distribution decreases. Most optimal solution has six small holes around the nozzle hole and a small rim covering all holes. In this case, pressure decreases only 3% in the axial direction and 4% in the radial direction at the distance of 2 mmfrom the front surface of the nozzle. Distribution of air velocity is still significant but its magnitude is about 35% ... 45% less than at the standard nozzle cup.

Słowa kluczowe

EN

fluid flow simulation; nozzle geometry; optimization

PL

przepływ płynu; optymalizacja; geometria dyszy

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2020
• Tom: Vol. 25, no. 4
• Strony: 214--222
• Opis fizyczny: Bibliogr. 18 poz., rys., wykr.

Twórcy

autor

Penkov I.

• Department of Mechanical and Industrial Engineering, School of Engineering Tallinn University of Technology Ehitajate tee 5, 19086 Tallinn, ESTONIA

autor

Aleksandrov D.

• Department of Mechanical and Industrial Engineering, School of Engineering Tallinn University of Technology Ehitajate tee 5, 19086 Tallinn, ESTONIA

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)