粒子图像测速技术优化设计盲端扰流器

Optimized design of dead-end spoilers using particle image velocimetry technology

关键词:  供水管网  盲端  扰流器  粒子图像测速技术  水质改善

Key words:  water supply network  dead-end  spoiler  particle image velocimetry technology  water quality improving

摘要:

针对中国城镇供水管网中存在的盲端支管污染问题,提出安装扰流器的创新解决方案。通过粒子图像测速技术,系统研究扰流器对低雷诺数湍流中盲端支管内污染物扩散的影响及控制效果,并对其设计参数进行优化。结果表明:扰流器能够在盲端支管与干管交界处形成空腔结构,显著改变干管来流路径与流动模式,降低盲端支管内旋转强度,减弱掺混效果；扰流器的设计参数包括倾斜角度、高度和宽度,安装位置对控制效果具有显著影响；倾斜角度为30°、高度较大、宽度更大的扰流器以及安装在干管前缘的位置更能有效抑制污染物向干管扩散。本研究为供水管网水质保障与运营管理提供了新的思路和方法,对维护居民用水安全具有重要意义。

Abstract:

In response to the widespread issue of pollution in dead-end pipes within urban water supply networks, an innovative solution involving the installation of spoilers was proposed. This study systematically investigated the impact of spoilers on the dispersion of pollutants within dead-end pipes under low Reynolds number turbulent flow conditions and evaluates their control effectiveness using particle image velocimetry technology. Additionally, the design parameters of the spoilers were optimized. The experimental results indicated that spoilers can create a cavity structure at the junction between the dead-end pipe and the main pipe, significantly altering the flow path and pattern of the incoming flow, reducing the rotational intensity within dead-ends, and weakening the mixing effect. The design parameters of spoilers, including tilt angle, height, and width, as well as their installation position, have a significant impact on the control effectiveness. Specifically, spoilers with a tilt angle of 30°, larger height and width, and installed at the leading edge of the main pipe are more effective in suppressing the spread of pollutants into the main pipe. This study provides new ideas and methods for water quality assurance and operational management of water supply networks, which is of great significance for ensuring the safety of residential water usage.