【摘要】 该文提出了 U形渠道抛物线形移动式量水堰板 ,研究量水堰板的壅水高度、临界淹没度、喉口水深 -流量关系与渠道断面、比降和喉口收缩比的关系 ,给出了喉口收缩比范围和流量系数计算公式 ,分析了其测流误差。研究表明 :U形渠道抛物线形移动式量水堰板 ,量水精度较高 ,结构简单 ,造价低 ,使用方便 ,可用于各种小 U形灌排渠道的移动式测流更多还原

【Abstract】 A new mobile parabolic thin plate weir for U shape channel flow measurement was developed, the height difference between upstream water and backwater and critical submerged ratio is analyzed, the allowable sectional area ratio of flow measuring weir to the U shape channel is obtained, the formulae for calculating the discharge and the law of the discharge coefficient are put forward. The results reveal that the new mobile parabolic thin plate weir with high measurement accuracy, simple structure, low cost and easy to use, can be used for small U shape channel flow measurement.更多还原