AYX2型积时式悬沙采样器进水管路优化设计

Optimization of Water Inlet Conduit for the Time-Accumulating Sediment Sampler

积时式悬沙采样器进口管路的结构和几何参数是影响采样器管嘴进口流速的关键因素之一。为保证所采水样的真实和准确性,一般要求采样器进口流速接近河流的天然流速。本文通过建立采样器进口流速的数学模型,对采样器进口管路进行了参数优化。研究表明,通过优化结构参数,在水深0- 40m,天然流速0-5m/s的范围内,采样器的进口流速系数K在[0.9,1.1]区间的概率可达98%。

The parameters of water inlet conduit of the time-accumulating sediment sampler are one of the key factors for the flow rate at water inlet. For the sake of reality and accuracy, it is necessary to make the flow rate at water inlet of conduit approximately equaling to that of water in river. Based on this, a mathematical model for the flow rate of sample water in conduit was built, and the dimensions of the conduit was optimized. After optimization, it shows that the possibility of coefficient K is 98% within the range of [0.9, 1.1 ] when the water rate in river is within the range of 0-5 m/s. By using the optimization results, a new sediment sampler was developed. The test results show that the flow rate at the water is equal to that in river in the condition that the water rate is under 0-5 m/s.