论文部分内容阅读
针对水工物理模型表面流速测量方法的技术现状,提出了一种不对流场造成破坏的新型光电非接触式表面流速测量方法。对流速测量原理进行推导,并对影响测量精度的因素进行了分析。搭建了实验系统,在6种不同标定流速下,对0、25kg/m3及50kg/m3三种含沙量情况下的流速进行了测量。实验结果表明,在三种不同含沙量情况下,实测流速与标定流速的一致性较好,证明理论的可行性。实验还发现,水体适量含沙能提高流速测量精度,流速相对误差能控制在8%以下。
Aiming at the technical status quo of the method for measuring the surface flow velocity of the hydraulic physical model, a new non-contact surface flow velocity measurement method without damage to the flow field is proposed. The flow rate measurement principle is deduced, and the factors affecting the measurement accuracy are analyzed. An experimental system was set up to measure the flow velocities under the conditions of 0, 25kg / m3 and 50kg / m3 under the condition of 6 different calibration velocities. The experimental results show that the consistency of measured flow rate and calibration flow rate is good under three different sediment concentrations, which proves the feasibility of the theory. Experiments also found that the appropriate amount of water can increase the flow rate measurement accuracy, the relative error of flow rate can be controlled below 8%.