堰闸站淹没孔流新理论推流方法

A New Theoretical Method of Pushing Flow for Submerged Hole Flow in Weir Sluicestation

基于流量系数法淹没孔流状态下,建立新的水力因素与流量系数两者关系,推出新的流量计算公式。该方法将原有理论计算公式中水位差(△Z)改变成上游水头(hu),计算出流量系数,采用水位差(△Z)与上游水头(hu)比值作为新的水力因素,而两者利用最小二乘原理分别对中上段、下段进行处理,处理后流量系数带入新的公式计算出流量。以福田寺水文站为例,用新的方法计算流量与实际测验流量进行了对比分析。结果表明:此方法计算可靠,各项参数指标达到水文资料整编规范要求,也符合实际情况。

Based on the flow coefficient method and the submerged hole flow state, the article established the relationship between the new hydraulic factors and the flow coefficient, and got a new flow calculation formula. The method changes the water level difference(△Z) in the original theoretical calculation formula to the upstream head(hu),calculates the flow coefficient, and uses the water level difference(△Z) and the upstream head(hu) ratio as the new hydraulic factor, and two The least squares principle is used to process the upper middle section and the lower section respectively, and the flow coefficient is processed into a new formula to calculate the flow rate. Taking the Futian Temple hydrological station as an example, a new method was used to calculate the flow rate and the actual test flow was compared and analyzed. The results show that the method is reliable and the parameters meet the requirements of the hydrological data reorganization specification, which is also in line with the actual situation.