Study On The Absorption Of Automobile Exhausts CO By Green Plant

These years the number of the vehicles of the big cities in China is increasing with the high speed of 17%. It brings prosperity to the economy, but it also contributes much to the air pollution in big cities. In order to decline the harm of automotive emission to the minimum degree, How to avoid the occurrence of the air pollution and clean the arisen pollution has become the problem that has attracted the most attention. Many experts focus on using the adsorptive ability of plants to restore automobile exhaust.Using the obturating room as platform, and the circulation airflow yard in the direction that the plant arranged lengthwise as the basic model to the numerical calculation, this paper applied the theory and the method of hydrodynamics to simulate the concentration distribution of the CO that automobile exhaust is used as the root in the different arranging pattern, and the CFD FLUENT software is used to numerical Simulation. According to the theoretic analysis to the models of mathematics and physics, it simulates the three-dimensional concentration distribution of the contaminated air by using the method of mixture multiphase model, k-εturbulent flow model and SIMPLIC algorithm etc. The paper also probed into the issues as discrete equation, the settle of the equation group, time push method and turbulent flow model etc. Furthermore, it tested the concentration distribution of automobile exhaust in the different arranging pattern by rational experiment project, method and measures. According to the result comparing with the test and numerical simulation, the reliability of mixture multiphase model and k-εturbulent flow model applied in numerical calculating for automotive exhaust diffuse is proved, as well as the feasibility of borderline condition method applied in this paper. The paper put forward the rational advice that growing plants in the model that the height and space between is the same, got the better species of plant that has stronger clean ability, and offered the new method of obturating room for electing the plant species to absorb automobile exhaust. This paper provided important foundation plat for studying the adsorptive ability of plants in ecosystem and the measures of prevention and cure for automotive emission using plants, as well as promoted development of the diffuse model and the measures of prevention and cure for automotive emission further.