从历史上看，供水公司管理配电系统主要是为了提供供水的可靠性 服务，如足够的压力和消防流量能力。但是，越来越严格 第二阶段D/DBP规则等法规也将重点放在了保持可接受的性能上 配水系统中的水质。目前正在对配电系统水质进行维护 对许多公用事业公司来说，这是一个重大挑战。配水系统中的水质挑战可能 包括消毒剂残留的损失、消毒副产品的增加、生物生长和 对于使用氯胺的系统，硝化作用。 未充分利用且混合特性差的储罐是一个重要的问题 配水系统内水质退化的可能性。计算流体 动态（CFD）建模和水温测量可以非常有效地 预测罐内的混合特性。本文主要研究CFD建模的应用 以及温度测量，以确定储罐中的混合特性 书房，弗吉尼亚市海滩。混合预测的结果得到了水的验证 质量数据，用于识别混合特性不充分的储罐，从而 水质退化的最大可能性。 一旦确定了混合问题的性质，就更容易做出适当的选择 对物理和操作进行修改，以改善储罐中的混合。 本文还介绍了 提出改进混合的一般建议，并报告实际物理特性 改进了储罐中的混合特性。 包括表格，数字。

Historically, water utilities have managed distribution systems primarily to provide reliability of service such as adequate pressure and fire flow capabilities. However, increasingly stringent regulations such as the Stage 2 D/DBP Rule have added a focus on also maintaining acceptable water quality in the distribution system. Maintenance of distribution system water quality is now a major challenge for many utilities. Water quality challenges in the distribution system may include loss of disinfectant residual, increase in disinfection byproducts, biological growth, and for systems that use chloramines, nitrification. Storage tanks that are underutilized and have poor mixing characteristics represent a significant potential for water quality degradation within the distribution system. Computational fluid dynamic (CFD) modeling and water temperature measurements can be very effective tools to predict mixing characteristics inside the tanks. This paper focuses on the use of CFD modeling and temperature measurements to determine mixing characteristics in storage tanks, using a case study, the City of Virginia Beach. The results from mixing predictions are verified by water quality data and used to identify the storage tanks with inadequate mixing characteristics and thus the greatest potential for water quality degradation. Once the nature of the mixing problem is identified, it becomes easier to make the appropriate physical and operational modifications to improve mixing in the storage tanks. This paper also presents general recommendations for improving mixing, and reports on actual physical modifications that have improved mixing characteristics in a storage tank. Includes table, figures.