一种新型洁净室送、回风型式的数值模拟

Numerical simulation of a new kind of air supply and air return cleanroom.

本文以工程中广泛使用的紊流模型为基础,采用有限差分法,对半圆柱形送风口、相对两侧墙下部回风式洁净空进行三维紊流流场和污染物扩散场的数值模拟,分析气流的流动特性和污染物的分布规律,得到了此类洁净空优化设计的技术参数表,为此种新型洁净室的设计及推广提供了依据。

In this paper, the three-dimensional turbulent flow field and the contamianat diffuson field are numerically simulated by means of the turbulent model widely used in engineering,and the finite difference schemes are adopted. Numerical simulation is used to precisely analyse the threedimensional turbulent flow fields of velocity and contaminent diffusion pattern in this kind of cleanroom with half cylinder air supply and lateral air return at the bottom of side walls.Ideas of air flow properties and contaminant diffusion patterns are gained and the main parameters of cleanroom of this type are obtained too.In conclusion, this paper provides basis for designing and using this new type of cleanroom.