Original scientific paper

AIR FLOW AND VELOCITY WITH DIFFERENT TYPES OF MISTBLOWERS

Vjekoslav Tadić orcid.org/0000-0002-2307-9255 ; Poljoprivredni fakultet Sveučilišta u Osijeku, Osijek, Hrvatska
Đuro Banaj ; Poljoprivredni fakultet Sveučilišta u Osijeku, Osijek, Hrvatska
Davor Petrović ; Poljoprivredni fakultet Sveučilišta u Osijeku, Osijek, Hrvatska
Dario Knežević ; Poljoprivredni fakultet Sveučilišta u Osijeku, Osijek, Hrvatska
Jasmina Lukinac
Ivan Menđušić ; Poljoprivredni fakultet Sveučilišta u Osijeku, Osijek, Hrvatska

Abstract

The objective of this study was to determine the vertical air flow velocity considering two different air flows on the axial and radial mistblower. With axial mistblower the air flow of 10995.75 and 14154.75 m3/h is used, and with radial mistblower the air flow of 6248.33 and 10265.16 m3/h. Axial mistblower achieves greater air flow with minor velocity, while radial mistblower achieves greater velocities with minor air flow. Vertical distribution of air flow velocity is more balanced with the exploitation of radial mistblower with relative by small deviation and coefficient of variation, unlike the axial mistblower which achieves greater deviations (axial mistblower, first adjustment: the right side of the machine with CV of 31.30% and the left with 31.04%, second adjustment: the right side of the machine with CV of 27.20% and the left with CV of 26.68%; radial mistblower, first adjustment: the right side of the machine with CV of 2.18% and the left with CV of 3.81%; second adjustment: the right side of the machine with CV of 5.61% and the left with CV of 10.51%). The left side of axial mistblower achieves significantly higher air velocity (first adjustment: the left side of the machine with average speed of 14.96 m/s and the right with 11.21 m/s; second adjustment: the left side of the machine with average speed of 19.38 m/s and the right with 15.58 m/s), unlike the radial mistblower, where the differences are minimal and focused on the right side (first adjustment: the left side of the machine with average speed of 14.95 m/s and the right with 16.25 m/s; second adjustment: the left side of the machine with average speed of 24.45 m/s and the right with 26.00 m/s). Owing to the air flow movement, mixing and friction occur with the surrounding air, so air flow velocity decreases (greater decrease with the exploitation of radial mistblower) – axial mistblower, first adjustment: the right side of the machine with the decreae of 35.10% and the left with 32.55%, second adjustment: the right side of the machine with the decrease of 44.58% and the left with 37.61%; radial mistblower, first adjustment: the right side of the machine with the decrease of 55.69% and the left with 55.11%, second adjustment: the right side of the machine with decreasing of 45.97% and the left with 46.42%). Radial mistblower achieves uniformly results of vertical air flow velocity distribution, and with flexible adaptable conduits, it can easily adapt to different breeding forms of permanent crops.

Keywords

axial mistblower; radial mistblower; air velocity; air flow; fan

Hrčak ID:

118494

URI

https://hrcak.srce.hr/118494

Publication date:

20.3.2014.

Article data in other languages: croatian

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