排风系统数值模拟研究

Numerical simulation study of exhaust system

摘要

排风系统数值模拟研究主要针对排风平洞及排风竖井进行了夏季、过渡季节和冬季三个季节工况的气流的温度场、速度场的数值模拟分析，通过CFD计算软件建立等比例数值模型，模拟实际运行过程中不同工况下排风系统的气流组织流动工况。CFD模拟计算方法可以看作是基本在流动方程(质量方程、动量方程、能量方程)的控制下模拟流体的流动。通过模拟，可以获得复杂问题流场内每个位置基本物理量(如速度、温度、湿度等)随时间变化的分布状况。排风系统数值模拟研究主要验证了排风系统在设计送排风参数、风口布置方式条件下的通风方案的可行性，为设计进一步优化、完善排风系统方案以及设备选型提供参考意见。

Abstract

The numerical simulation study of the exhaust air system mainly simulates the temperature field and velocity field of the airflow under the three working conditions of summer, transition season and winter for the exhaust flat tunnel and exhaust shaft, and establishes the equal scale numerical model through CFD calculation software to simulate the airflow organization and flow conditions of the exhaust system under different working conditions in the actual operation process. The CFD simulation method can be seen as basically simulating the flow of a fluid under the control of the flow equations(mass equation, momentum equation, energy equation). Through simulation, the distribution of basic physical quantities(such as velocity, temperature, humidity, etc.) at each location in the flow field of complex problems can be obtained over time. The numerical simulation study of the exhaust system mainly verifies the feasibility of the ventilation scheme of the exhaust system under the condition of designing the air supply and exhaust parameters and the layout of the air outlet, and provides reference opinions for the design to further optimize and improve the exhaust system scheme and equipment selection.

关键词

排风系统 / 温度分布 / 速度分布 / 数值模拟 / CFD

Key words

exhaust system / temperature distribution / velocity distribution / numerical simulation / CFD