摘要
不规则断面无压隧洞瞬时流量的测量受测量方法、测点选择、断面形状、运行工况等各种因素影响,测量精度与输水工程的水量调度密切相关.本文以引绰济辽输水洞采用时差法超声波流量计进行流量测量为例,结合实际工程,选择合适的测流断面位置,对城门洞型无压隧洞等不规则断面流量测量的系统配置、断面选择、声道迭代方法进行分析.
Abstract
The measurement of instantaneous flow of non-pressure tunnel with irregular section is affected by various factors such as measurement method,measurement point selection,section shape,operating conditions,etc.The measurement accuracy is closely related to the water scheduling of water diverting project.In this paper,taking the ultrasonic flowmeter with time difference method for flow measurement in water tunnel of water diverting project from Chuo'er River to Xiliao River as an example,and combining with the physical engineering,the system configuration,section selection and sound channel iteration method of flow measurement of irregular section such as Chengmen tunnel without pressure are analyzed by selecting the appropriate section location based on practical projects.
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