Anti-clogging performance evaluation and parameterized design of emitters with labyrinth channels
2010
Zhang, Jun | Zhao, Wanhua | Tang, Yiping | Lu, Bingheng
The anti-clogging performance of emitters with labyrinth channels is a key factor affecting their long-term service. Considering the limitation of evaluation on emitter's anti-clogging performance at present, a new method using passage rate of particles as the evaluation index was proposed based on stochastic trajectory model in a Lagrangian reference frame. Using orthogonal design, the passage rates of particles of 16 trapezoidal labyrinth channels with various geometries were calculated, where 4 dimensionless parameters were taken as the factors. The results obtained from analysis of range and variance showed that the influence degree on passage rate of particles ranks as follows: α > D/W > S/H > H/D. A mathematic model was established between the particle passage rate and 4 key parameters according to the multivariable regression method, which can be used to predict and compare the anti-clogging performance of trapezoidal labyrinth channels with different geometries.
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