Goran Gjetvaj

Water hammer in irrigation systems

Self-propelled sectorial rain guns (typhones) and self-propelled automated devices for linear or circular irrigation are often used in irrigation systems. However, unwanted overpressure can occur due to sudden closure of valves at the entrance segment of these devices. The system is protected against such overpressure by gradual closure of valves. The protection of the system against excessive and insufficient pressures, and the impact of simultaneous closure of valves at peripheral parts of the network, are defined in the paper based on an example of hydraulic calculation of unsteady flows at the Blata Cerna Irrigation System.U sustavima navodnjavanja se često koriste samohodni sektorski raspršivači (tifoni) i samohodni automatizirani uređaji za linijsko ili kružno navodnjavanje na kojima uslijed naglog zatvaranja zasuna na ulazu u uređaj može doći do pojave neželjenog predtlaka. Sustav se štiti od neželjenog predtlaka postupnim zatvaranjem zasuna. U radu je na primjeru hidrauličkog proračuna nestacionarnih stanja na sustavu navodnjavanja Blata – Cerna definirana zaštita sustava od prevelikih i premalih tlakova te utjecaj istodobnog zatvaranja zasuna na rubnim dijelovima mreže.

Vodni udar u sustavima navodnjavanja

Self-propelled sectorial rain guns (typhones) and self-propelled automated devices for linear or circular irrigation are often used in irrigation systems. However, unwanted overpressure can occur due to sudden closure of valves at the entrance segment of these devices. The system is protected against such overpressure by gradual closure of valves. The protection of the system against excessive and insufficient pressures, and the impact of simultaneous closure of valves at peripheral parts of the network, are defined in the paper based on an example of hydraulic calculation of unsteady flows at the Blata Cerna Irrigation System.U sustavima navodnjavanja se često koriste samohodni sektorski raspršivači (tifoni) i samohodni automatizirani uređaji za linijsko ili kružno navodnjavanje na kojima uslijed naglog zatvaranja zasuna na ulazu u uređaj može doći do pojave neželjenog predtlaka. Sustav se štiti od neželjenog predtlaka postupnim zatvaranjem zasuna. U radu je na primjeru hidrauličkog proračuna nestacionarnih stanja na sustavu navodnjavanja Blata – Cerna definirana zaštita sustava od prevelikih i premalih tlakova te utjecaj istodobnog zatvaranja zasuna na rubnim dijelovima mreže.