Numerical Simulation of Environmental Control for Relics Preservation in the Funerary Pit by Air Curtain System

The air pollution and fluctuation of environmental parameters are the main causes of desiccation cracking, efflorescence of relics in archaeology museum. In this research, an air curtain system was proposed to separate the local environment in funerary pit from the large-space exhibition hall. An investigation of the air curtain was carried out to evaluate the integrated performance and to obtain the optimal jet elevation and velocity of the air curtain. The results show that the optimal jet elevation and jet velocity of the air curtain system were 3° and 5.5m/s, respectively. The preservation environment in the funerary pit can be greatly improved by the air curtain, the temperature difference between the top and bottom of funerary pit could be reduced to only 0.2°C. Moreover, the isolation efficiency of the air curtain system can reach to 89%.