摘要
针对目前我国地下滴灌田间管网水力计算和水力特性研究较少,不能满足实际工程计算要求的问题,在前期试验和地下滴灌毛管水力计算数学模型的基础上,采用数值模拟方法,建立了地下滴灌田间管网水力计算数学模型。利用该模型可求解均匀坡、均匀土质、支管与毛管管径不变及均匀出流条件下的地下滴灌田间管网水力特征值。实例计算结果表明,该模型计算偏差小于1/1 000,精度满足实际工程计算要求。
At present,few research reports on hydraulic calculation and hydraulic characteristics of field pipe network in subsurface drip irrigation（SDI） can be found in China.While these limited studies could not meet the requirements of engineering design.The mathematical model for hydraulic calculation in SDI filed pipe network was established based on former experiments and mathematical model of hydraulic calculation in SDI laterals.Using the model the hydraulic characteristics values in SDI field pipe network can be numerically solved under various conditions of uniformity slope,homogeneous soil,constant capillary diameter and constant space of submain pipes and laterals.Calculating results of the examples showed that the error s was less than 1/1 000,which is accurate enough to meet the needs of practice.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2011年第2期148-154,共7页
Journal of China Agricultural University
基金
国家自然科学基金资助项目(50979089
50549018)
塔里木大学校长基金自然科学项目(TDZKBS1001)
关键词
滴灌
田间管网
水力计算
数值模拟
drip irrigation
field pipe network
hydraulic calculation
numerical simulation
