滴灌梯形迷宫滴头流道水力性能的响应曲面法优化

滴灌滴头水力性能优化是滴灌技术不断发展的需要。采用响应曲面法研究了梯形迷宫滴头流道的流道宽度、长度、深度、转角和流道单元数等5个关键参数对滴头水力性能（流态指数和流量系数）的影响与最佳水平。试验结果表明，所测试梯形迷宫滴头最优流道宽度、长度、深度、转角和流道单元数分别为1.55 mm、2.33 mm、1.55 mm、46.32°和20，优化后滴头的流态指数为0.4993、流量系数为0.4441，较优化前流态指数提高了5.624%，滴头水力性能得到了改善。

Optimization of hydraulic performance for drip irrigation trapezoidal labyrinth channel of emitter using response surface methodology

The hydraulic performance of drip irrigation emitter was affected by five parameters, the width, length, depth, angle and unit number of the trapezoidal labyrinth channel. In order to investigate these parameters, three-level Box-Benhnken design was carried out. By solving the quadratic regression model equation using appropriate statistic methods, the optimum parameters were determined. The width, length, depth, angle and unit number were 1.55 mm, 2.33 mm, 1.55 mm, 46.32° and 20, respectively. The flow index was 0.4993 and the flux coefficient was 0.4441.The hydraulic performance of drip irrigation emitter can be improved by 5.624% when optimum parameters were adopted.