Experimental Study on Clogging and the Capability of Sediment Transportation about Labyrinth Emitter

Aiming at two types of muddy water with the diameters of 0.25~0.224 mm and 0.224~0.18 mm sediment particle,This paper tests the instance of physical clogging and capability of sediment transportation about the emitter under the circumstance of three types of emitter inlet pressure and four types of different concentrate muddy water and several velocity in capillary.The experimental results show that: 1) the diameter of the sediment particle is the primary factor which leads to clog in emitter and the second one is the emitter inlet pressure.The bigger the diameter of the sediment particle and the higher the emitter inlet pressure,the higher the probability that emitter clogged;2) the clogging of labyrinth emitter is both abrupt and gradual and the sediment deposition always exists in the whole cross section of the labyrinth path;3) the capability of sediment transportation of emitter improved along with the muddy water concentration increased and can export sediment in emitter when the diameter of the particle less than 1/5 that of the emitter path and discharge in labyrinth emitter is unchangeable in test time,on the other hand,the capability of sediment transportation of emitter becomes stronger along with the aggrandizement of the discharge when muddy water concentration is stated.