Numerical Simulation Study Of CO Concentration Of Multi-source Information Fusion Highway Tunnel

Currently, the rapid development of highway tunnels has become an important and indispensable part of national road network. Highway tunnel in the operating process with a single monitoring system sensor emplaced few varieties, reliability and low. In addition, the existing tunnel monitoring system cannot monitor the distribution of pollutants in three-dimensional space within the tunnel, so that the increase in the energy consumption of the operators of the tunnel, raising the cost of security risks highlight. Comprehensive utilization of the tunnels existing monitoring system sensors play each sensor provides information, you can make up for the lack of tunnel sensor system, as well as the numerical simulation of the spatial distribution of the tunnel pollutants reasonable economic tunnel ventilation optimize ventilation control method, The purpose of intelligent monitoring environmental pollution to improve tunnel safety, reducing energy consumption is of great significance.Taking into account the carbon monoxide concentration of CO is an important indicator of the tunnel environmental monitoring, related to the safety of the highway tunnel. This article on one hand, the existing tunnel monitoring system sensors targeted to the comprehensive utilization of the tunnel sensor monitoring information, the application of multi-source information fusion technology, the concentration of the fusion prediction tunnels CO, to make up the tunnel sensor set a single, low reliability issues. On the other hand, due to the tunnel CO concentration distribution is influenced by many factors, CO concentration distribution in the tunnel space is more difficult to understand, but the application of computational fluid dynamics CFD technology, numerical simulation of tunnel CO concentration distribution in the tunnel space.First, BP, RRF neural networks, support vector machine (SVM) to establish a a different single information fusion model and road tunnel in the failure of the CO sensor data fusion, simulation experiments comparing the various single fusion model incorporates the effect of the concentration of CO found that a single fusion model fusion of the tunnel CO concentration is effective, and the presence of a single fusion model fusion accuracy is not high enough to make up for a single model accuracy is not high for this deficiency, but also to establish the optimal weighting of different combinations of information fusion model. Simulation results show that:optimal weighted fusion performance is better than the single fusion model, but different single-model combinations have different effects on the optimal weighted fusion effect. Followed by further study found the combination of a single fusion model the optimal weighting model fusion precision the impact of the law, and the law provide a new way to participate in a single model of the optimal weighted fusion screening. Last for long highway tunnel mainstream longitudinal ventilation, respectively, to establish a local tunnel shaft ventilation, jet ventilation mode CO concentration distribution model Application Fluent tunnel CO concentration field numerical simulation, the simulation results show that:a longitudinal ventilation mode, CO diffusion speed, uniform and CO can effectively diffusion dilution concentration distribution in general, but two kinds of ventilation methods have their advantages and disadvantages, single ventilation mode is not ideal, to form a combination of ventilation pattern can provide tunnel ventilation effect. The study showed that the central shaft ventilation mode should shafts designed interrupt or end of the tunnel, and the rest with jet ventilation-induced increase in CO diffusion and dilution effects.