Experimental research of time for opening and closing of spray in flat and injector nozzles

Abstract Experimental studies have been carried out to determine time for opening and closing of spray in Lechler ST 110-02 and IDK 120-02 nozzels for the combined spraying working body (CWB). The spray nozzles have been filmed by digital video camera. We received the results of opening time for nozzles and calculated the arithmetic mean, average square deviation (standard), and coefficient of variation by average square deviation. The opening time(arithmetic mean) for Lechler ST 110-02 flat nozzle 0,235 s. The opening time for Lechler IDK 120-02 injection sprays nozzle 0,435 s. The average value of the closing for spray in Lechler ST 110-02 is 0.04 s, and the Lechler IDK 120-02 nozzle is 0.08 s. The transient time for switching from the ST 110-02 nozzle to the IDK 120-02 nozzle should be 0.395 s, and the switching from the IDK 120-02 nozzle to the ST 110-02 nozzle should be 0.155 s.