超高速自由液面循环水槽高品质测试流场技术

超高速自由液面循环水槽的关键在于如何在开式状态下形成平稳的自由液面,通过建立自由面形成技术,从水力系统导流、整流、消能和主循环泵与辅助泵系统匹配等多方面权衡设计,以保证工作段速度从低速到高速时自由面的稳定度和不均匀度。采用LDV或PIV技术,测量不同水速下工作段区域多个截面的速度分布以及自由液面的波高,得到工作段流场分布,以及基本性能状态,验证自由面形成技术的合理性和可行性。为未来在该设备上开展试验提供了初步的测试数据支撑。

High-quality Test Technology for Flow Field of Super High Speed Free Surface Circulating Tunnel

The key point of super high speed free surface circulating tunnel lies in the formation of a stable free surface in the open state.The stability and non-uniformity of the free surface when the speed of the working segment changes from low speed to high speed should be ensured by the establishment of the free surface formation technology and the trade-off design in the aspects of the diversion,reflection and energy dissipation of the hydraulic system,and the matching between the main circulating pump and the auxiliary pump system.LDV or PIV techniques are used to measure the velocity distributions of the multiple sections and the wave height of the free surface in the working segment under the different flow velocities.The flow field distribution and the basic performance of the working segment are obtained to validate the rationality and feasibility of the free surface formation technology.It can provide preliminary data support for tests on this device in the future.