Experimental study on the effects of fluctuating hydraulic parameters on working pressure of emitters

摘要

Although the low-pressure irrigation system can save energy, it is easy to clog and not conducive to long-term stable operation of irrigation systems. Therefore, we improved the emitters by changing the original constant hydraulic pressure to a dynamic working mode with fluctuating frequency and amplitude, hoping to enhance its anti-clog ability at low pressure operation state. The dynamic working mode was designed using basal hydraulic pressure, amplitude, and fluctuation cycle as variable parameters and optimized using orthogonal experiments. The relationship among these variables, discharge characteristics, and corresponding fluctuation coefficients were calculated and analyzed using mathematical differential and fitting tools. The established formula for calculating equivalent hydraulic pressure in fluctuation conditions could lay a foundation for numerical simulating hydraulic performance at fluctuating hydraulic pressure.