Z形薄壁堰过流能力试验
发布时间：2018-10-22 07:21
【摘要】：鉴于Z形堰的水流特性及过流能力尚未见到相关报道,为研究Z形堰的过流能力,采用概化水工模型,进行了6个堰型方案、12组流量的水工模型试验。结果表明,Z形堰的过流能力大于直线堰,且Z形堰的展宽比越大,流量扩大倍数越大;Z形堰的流量计算可采用通用的堰流公式,其综合流量系数与堰上水深、堰高、展长、前堰宽、后堰宽等因素有关,展宽比、前后堰宽比越大,流量系数越大;堰上水深与堰高之比越大,流量系数越小。利用试验数据给出了考虑堰上水深与堰高之比、展宽比、前后堰宽比等因素的Z形堰流量系数估算公式。
[Abstract]:In view of the fact that the flow characteristics and overcurrent capacity of Z Weir have not been reported, in order to study the overflow capacity of Z Weir, six Weir schemes and 12 groups of flow rate hydraulic model tests have been carried out in order to study the over flow capacity of Z Weir. The results show that the excess flow capacity of Z Weir is greater than that of straight Weir, and the larger the widening ratio of Z Weir is, the greater the discharge expansion multiple is, and the general Weir flow formula can be used to calculate the flow rate of Z Weir, and the comprehensive flow coefficient and the depth of the Weir, the height and the length of the Weir can be calculated. The width of the front Weir and the width of the Weir are related to each other. The widening ratio, the bigger the ratio of the width to the width of the Weir, the greater the discharge coefficient, and the greater the ratio of the water depth to the height of the Weir, the smaller the flow coefficient. Based on the experimental data, a formula for estimating the flow coefficient of Z-shaped Weir considering the ratio of water depth on Weir to Weir height, the ratio of width to width, and the ratio of Weir width to width before and after is given.
【作者单位】： 山东农业大学水利土木工程学院;淮河流域管理委员会沂沭泗局河东河道管理局;
【基金】：国家自然科学基金(51409155)
【分类号】：TV135
本文编号：2286483
[Abstract]:In view of the fact that the flow characteristics and overcurrent capacity of Z Weir have not been reported, in order to study the overflow capacity of Z Weir, six Weir schemes and 12 groups of flow rate hydraulic model tests have been carried out in order to study the over flow capacity of Z Weir. The results show that the excess flow capacity of Z Weir is greater than that of straight Weir, and the larger the widening ratio of Z Weir is, the greater the discharge expansion multiple is, and the general Weir flow formula can be used to calculate the flow rate of Z Weir, and the comprehensive flow coefficient and the depth of the Weir, the height and the length of the Weir can be calculated. The width of the front Weir and the width of the Weir are related to each other. The widening ratio, the bigger the ratio of the width to the width of the Weir, the greater the discharge coefficient, and the greater the ratio of the water depth to the height of the Weir, the smaller the flow coefficient. Based on the experimental data, a formula for estimating the flow coefficient of Z-shaped Weir considering the ratio of water depth on Weir to Weir height, the ratio of width to width, and the ratio of Weir width to width before and after is given.
【作者单位】： 山东农业大学水利土木工程学院;淮河流域管理委员会沂沭泗局河东河道管理局;
【基金】：国家自然科学基金(51409155)
【分类号】：TV135
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