Simulation Of Temperature Distribution And Soot Density In Ethylene-air Diffusion Flame

With the rapid development of economy and the rapid increase of population in the world, the demand for energy is greatly increasing. The environmental issues hidden behind the energy consumption and economic development are increasingly prominent. Environmental pollution and destruction is particularly prominent in developing countries. Soot is one of pollutants produced by burned fossil fuel and is a substance which is not completely transformed into energy. Soot particles are so very small that it easily enters the lungs through the respiratory tract and deposition in it. The polycyclic aromatic hydrocarbons (PAH) of soot particle surface have mutagenic and carcinogenic. In addition to carbon dioxide, the soot particles also have a greenhouse effect. And soot particles play an important part in the process of climate change. Soot also has highly radioactive and the continuous radiation of soot is the main reason of fire growth and spread. Therefore, it is critical to understand the physical and chemical mechanisms about soot formation, and make it possible to control the processes of soot nucleation, surface growth and oxidation.The main content of the article is using Fluent software, detailed gas-phase reaction mechanism and a simple two-equation model to simulate and calculate non-premixed ethylene flame temperature distribution and two-dimensional soot concentration distribution. At different oxygen concentrations, the article simulates the changes of the flame temperature and soot mass fraction distribution. In the case of constant air flow, the article simulates the changes of the flame temperature and soot mass fraction distribution caused by the changes of fuel flow. In the case of adding a certain proportion of hydrogen, the article simulates the changes of the flame temperature and soot mass fraction distribution. And it is necessary to make a compare between simulation results and experimental results made by Liang Junhui working with me in a same lab. Although the inlets are different, the variations are the same. So the results concluded in the article are basically good.