Numerical Simulation Of Flow Field And Temperature Field Around Highway Embankment In Different Line-styles

The research contents of this paper belongs to the project of National Natural Science Foundation of China named "The research on the effect of highway construction on regional airflow field"(51178033). The highway construction in our country cover the national transport network in a high speed along with the rapid development of the national economy, but also brought to the ecological environment along the construction of pressure to follow. Because the highway and vehicles change the stability and regional temperature distribution of air flow field of the original area, especially the addition of foreign gas, such as automobile exhaust, the characteristics of the surrounding flow field becomes more complex, increasing the difficulty of environmental protection. The researches on the change of regional environmental assessment and regional highway flow field are still far from perfect, therefore, through theoretical analysis and numerical simulation, it is of great significance in the study of the effect of highway and exhaust on regional environment.This paper is based on the basic theory of computational fluid dynamics, using the CFD software FLUNET in the numerical simulation of highway regional flow field and temperature field in different line-styles, the main research contents:(1) By the numerical simulation of linear highway regional temperature field, temperature field distribution analysis of different level and cross section is analyzed, comparing temperature distribution rules with or without vehicle, to get different conditions of regional temperature field distribution; compare changes of regional temperature field emission with or without exhaust emissions.(2) Simulate the flow field around linear highway, proposing the concept of velocity varying factor as the object of study to analyze the flow field distribution of different level, cross section; Compare the distributions of flow field and temperature field with a single vehicle, summarizing the relationship between the distribution of temperature field and flow field distribution under the same conditions.(3) Select different line-types of highway model for numerical simulation of the flow field and temperature field, select different level and cross sections for analysis, comparing the different effects on regional temperature field distribution under different line-types of highway model. (4) Make a summary of the research, and future researches are prospected.The research work of this paper will provide reference for the study of highway regional thermal environment and air environment.