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  • Impact of technical sprayin...
    Vujcic, Branimir; Tadic, Vjekoslav; Markovic, Monika; Lukinac-Cacic, Jasmina; Stosic, Miro; Plascak, Ivan

    Tehnički vjesnik, 04/2015, Letnik: 22, Številka: 2
    Journal Article

    The influence of technical spraying factors on vertical distribution of liquid and air velocity was observed and measured with vertical pattemator device. In research, Lechler yellow (TR 8002C) and red (TR 8004C) nozzles are used with two different sets of fan rotor blades (two different air velocities) at 540 rpm of PTO. The research was set as controlled three - factorial experiment (without the influence of weather factors) with 8 treatments in 4 repetitions, for each side of Agromehanika AGP 440 axial fan sprayer. Technical spraying factors (ISO nozzle number, settings of fan blades and spraying height) have a high significant impact (**) on the main properties of the research (vertical distribution of liquid and air velocity). By decreasing the ISO nozzle number and air velocity the increase of liquid deposit is found on vertical pattemator and with the increase of measuring height a non-uniform distribution of liquid and air velocity is found. In addition, a non-uniform distribution of liquid and air velocity is established between the left and right sides of the machine. With regression analysis between the vertical distribution of liquid and air velocity on both sides of the machine, a statistically significant coherence is determined (left side of the machine: r = 0,96; p < 0,01; right side of the machine: r = 0,97; p < 0,01).Original Abstract: Istrazuje se utjecaj tehnickih cimbenika rasprsivanja na vertikalnu raspodjelu tekucine i brzine zraka, mjerenu s uredajem vertikalnim peternatorom. Koriste se zute (TR 8002C) i crvene (TR 8004C) Techler mlaznice te dva razlicito podesena zakosenja lopatica rotora ventilatora (dvije razlicite brzine zracne struje) pri 540 o/min PVT-a. Istrazivanje se postavlja kao kontrolirani trofaktorijalni pokus (bez utjecaja vremenskih cimbenika) sa 8 tretmana u 4 ponavljanja, za obje strane nosenog aksijalnog rasprsivaca Agromehanika AGP 440. Tehnicki cimbenici rasprsivanja (ISO broj mlaznice, podesavanje lopatica ventilatora i visina rasprsivanja) ostvamju vrlo znacajan utjecaj (**) na glavna svojstva istrazivanja (vertikalna distribucija tekucine i brzine zracne struje). Smanjivanjem ISO broja mlaznice i smanjivanjem brzine zracne stmje povecava se kolicina tekucine deponirana na vertikalnom paternatoru, te povecavanjem visine mjerenja na vertikalnom paternatoru dolazi do neuniformne raspodjele tekucine i brzine zracne struje. Uz navedeno, utvrduje se neuniformna raspodjela kolicine tekucine i brzine zracne struje izmedu lijeve i desne strane stroja. Regresijskom analizom izmedu vertikalne raspodjele kolicine tekucine i brzine zraka s obje strane stroja utvrduje se visoka statisticki znacajna povezanost (lijeva strana stroja: r = 0,96; p < 0,01; desna strana stroja: r = 0,97; p < 0,01).