Research On Operation Heat Accumulation And Spray Cooling Feasibility In Chongming Tunnel

Recently, with the road of city tunnel is becoming longer and the traffic is increasing. As the result, the quantity of heat increases rapidly in the road tunnel of city. This straightly affects tunnel operation. With the tunnel structure storage energy ability decreased year after year, the air temperature becomes higher in the tunnel .To this question, this study paper is to do air temperature accumulation and spray cooling in Chongming tunnel.According to the actual of Chongming tunnel and the design project of Shanghai Tunnel Design Institution, find the factors which affect heat gain , adopt ANSYS software analysis the factors which affect air temperature accumulation, such as the quantity of wind, heat gain , tunnel structure storage energy ability, tunnel operation time etc.In order to assure the tunnel operate safely ,It must be adopt cooling measure in the tunnel .Based on study the commons use cooling measure at present, advanced adopting spray cooling method. According to introduce atomization mechanism of nozzle and spray cooling mechanism, study the factors which affect the single liquid movement track, such as liquid diameter liquid initialization speed and air relative humidity, and use DPM model validate it, confirm that spray cooling application in the tunnel is feasible.