| 压力补偿式灌水器补偿腔结构参数对颗粒运动的影响 |
| |
| 引用本文： | 喻黎明,余家锐,李娜,钟艺,王昌满,赵思懿.压力补偿式灌水器补偿腔结构参数对颗粒运动的影响[J].农业机械学报,2023,54(12):338-349. |
| |
| 作者姓名： | 喻黎明 余家锐 李娜 钟艺 王昌满 赵思懿 |
| |
| 作者单位： | 昆明理工大学 |
| |
| 基金项目： | 国家自然科学基金项目（52269011）和云南省重大科技专项（202302AE090024） |
| |
| 摘 要： | 为解决颗粒在迷宫流道压力补偿式灌水器内大量沉积或堵塞以致影响灌水器正常工作的问题，采用FSI模拟固定垫片变形后，基于CFD-DEM耦合模拟，经试验对比验证其可靠性后，设计单因素及Box-Behnken响应面试验，分析了压力补偿腔内副流道截面积、压力补偿腔出口直径、压力补偿腔直径3个结构参数及其交互作用对灌水器抗堵塞性能的影响，通过建立回归模型预测灌水器颗粒停留率，综合判断灌水器的抗堵塞性能。结果表明：副流道截面积由0.018 mm2提升至0.054 mm2时，颗粒停留率降低5.09个百分点；压力补偿腔出口直径由1.4 mm下降至0.8 mm时，颗粒停留率降低2.87个百分点；且颗粒沉积受副流道截面积和压力补偿腔出口直径、副流道截面积和压力补偿腔直径两种交互作用影响显著，交互影响下颗粒停留率最低为7.67%。拟合出颗粒停留率与压力补偿腔内副流道截面积、压力补偿腔出口直径、压力补偿腔直径3个结构参数的回归方程，可用于评判和预测灌水器抗堵塞性能，且推荐了一组副流道面积为0.051 mm2、压力补偿腔出口直径为0.894 mm、...
|
| 关 键 词： | 压力补偿式灌水器 抗堵塞 预测模型 压力补偿腔 CFD-DEM |
| 收稿时间： | 2023/5/15 0:00:00 |
Effect of Pressure-compensated Irrigator Compensation Chamber Structure Parameters on Particle Movement |
| |
| YU Liming,YU Jiarui,LI N,ZHONG Yi,WANG Changman,ZHAO Siyi.Effect of Pressure-compensated Irrigator Compensation Chamber Structure Parameters on Particle Movement[J].Transactions of the Chinese Society of Agricultural Machinery,2023,54(12):338-349. |
| |
| Authors: | YU Liming YU Jiarui LI N ZHONG Yi WANG Changman ZHAO Siyi |
| |
| Institution: | Kunming University of Science and Technology |
| |
| Abstract: | In order to solve the problem of massive deposition or blockage of particles in the labyrinth runner pressure-compensated irrigator to the extent of affecting the normal operation of the irrigator, after simulating the deformation of the fixed gasket by FSI, and based on the coupled simulation of CFD-DEM, and after verifying its reliability through experimental comparisons, the design of the one-factor and Box-Behnken response surface test was carried out to analyze the effects of the three structural parameters of the sub-runner cross-sectional area in the pressure-compensated chamber, the outlet diameter of the pressure-compensated chamber, the diameter of the pressure-compensated chamber and their interactions on the anti-clogging performance of the irrigator, and to make comprehensive judgments on the anti-clogging performance of the irrigator through the establishment of a regression model for the prediction of the particles retention rate in the irrigator. The results showed that the particle retention rate was decreased by 5-09 percentage points when the cross sectional area of the secondary flow channel was increased from 0.018mm2 to 0.054mm2; and the particle retention rate was decreased by 2.87 percentage points when the diameter of the pressure-compensated outlet was decreased from 1.4mm to 0.8mm. Particle deposition was significantly affected by two interactions, the cross-sectional area of the secondary flow channel and the outlet diameter of the pressure-compensated chamber, and the cross-sectional area of the secondary flow channel and the diameter of the pressure-compensated chamber, with the lowest particle retention rate of 7.67% under the interaction. The regression equations of particle retention rate and three structural parameters, namely, cross-sectional area of the secondary flow channel in the pressure-compensated chamber, outlet diameter of the pressure-compensated chamber, and diameter of the pressure-compensated chamber, were fitted, which can be used to judge and predict the anti-clogging performance of the irrigator, and a set of optimal anti-clogging parameters with a secondary flow channel area of 0.051mm2, an outlet diameter of the pressure-compensated chamber of 0.894mm, and a diameter of the pressure-compensated chamber of 6.923mm were recommended. In conclusion, by studying the clogging mechanism of the pressure-compensated irrigator, a judgment model that can predict the particle retention rate was established, which reduced the probability of clogging of the irrigator and improved its stable filling time, and provides theoretical support for the design of anti-clogging performance of this type of irrigator. |
| |
| Keywords: | pressure-compensated irrigator anti-clogging prediction model pressure compensated chamber CFD-DEM |
|
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
|
