• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Joint Power Generation conference >INNOVATIVE 3-D NUMERICAL SIMULATION OF THERMAL DISCHARGE FROM BROWNS FERRY MULTIPORT DIFFUSERS
【24h】

INNOVATIVE 3-D NUMERICAL SIMULATION OF THERMAL DISCHARGE FROM BROWNS FERRY MULTIPORT DIFFUSERS

机译：棕色渡轮多端口漫射器的创新3-D数值模拟热排放

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The TVA Browns Ferry Nuclear Power Plant (BFNPP) withdraws its condenser cooling water from Wheeler Reservoir via an intake pumping station. Waste heat from the plant increases the condenser cooling water temperature. The heated water returns to the reservoir through three multiport diffusers containing a total of about 22,500 downstream facing ports. The ports are 2 inch diameter holes situated 6 inches apart both vertically and horizontally. The numerous small diffuser ports, the buoyancy of the heated effluent, and the large scale of the discharge area to be simulated present major challenges to developing a reliable three-dimensional computational fluid dynamics (CFD) method for predicting temperature distributions and flow patterns in Wheeler Reservoir. This paper presents an innovative CFD method and the results for numerically simulating under steady conditions the thermal discharge from the BFNPP. A finite-volume CFD package, FLUENT, was used to develop the required numerical models. The realizable k-s turbulence model was selected for closure of the Reynolds-Averaged Navier-Stokes Equations. Second-order accurate schemes were used to discretize the governing equations. To simulate the discharge from thousands of diffuser ports, the CFD method features an innovative two-zone modeling approach, consisting of a multiple jet sectional model and an overall river model. The latter contains about 2 million computational cells for simulating the cooling water discharged from the thousands of multiport diffuser ports. The multiple jet sectional model, which simulates the flow from the individual discharge ports over a one foot slice of the diffuser pipe in great detail, provides the information for developing sectional boundary conditions for the diffuser effluent. These boundary conditions are then used in the overall river model for the whole study area. Validation and verification of the CFD models were performed using data from field measurements, hydraulic model tests, and other experiments. Comparisons between the CFD results and these data showed that the overall river model, based on the two-zone approach, can reproduce the major features of temperature and flow in the diffuser mixing zone. Model limitations exist, however, for low river flows, where requirements for steady behavior impede solution convergence.
机译：TVA Browns Ferry核电站（BFNPP）通过进气泵从轮式储存器取出其冷凝器冷却水。来自植物的废热会增加冷凝器冷却水温。加热的水通过三个多端口漫射器返回到储存器，总共包含约22,500个下游朝向端口。端口是2英寸直径的孔，位于垂直和水平的6英寸。许多小漫射端口，加热流出物的浮力，以及要模拟的大规模的放电区域的主要挑战存在于开发可靠的三维计算流体动力学（CFD）方法，用于预测载体中的温度分布和流动模式水库。本文介绍了一种创新的CFD方法，以及在稳定条件下进行数字模拟的结果，来自BFNPP的热量排放。使用有限卷CFD包，流畅，用于开发所需的数值模型。选择可实现的K-S湍流模型，用于关闭Reynolds平均的Navier-Stokes方程。二阶准确方案用于离散控制方程。为了模拟来自数千个漫射端口的排放，CFD方法具有创新的双区建模方法，包括多次喷射截面模型和整体河流模型。后者包含大约200万辆计算单元，用于模拟从数千个多端口漫射端口排出的冷却水。多次喷射截面模型，其在一英尺的漫射管中从单独的排放口模拟流动的流量，提供了用于开发扩散流出物的截面边界条件的信息。然后将这些边界条件用于整个研究区域的整体河流模型中。使用来自现场测量，液压模型测试和其他实验的数据进行CFD模型的验证和验证。 CFD结果与这些数据之间的比较表明，基于双区域方法的整体河流模型可以再现漫射器混合区温度和流动的主要特征。然而，对于低河流，存在模型限制，其中稳定行为的要求阻碍了解决方案收敛。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号