Analysis of cooling air flow field in front power compartment of tracked vehicle

Cooling air flow fields of front power compartment in tracked vehicle were researched, while both physical and mathematical models were built. Cooling air flow fields around inner and exterior of a power compartment equipping with several radiators with different entry boundary conditions were simulated. These studies were compared with the experimental results. The influence of vehicle speeds on change regular of cooling air mass flow of radiators was analyzed. The research shows that, under the same rotating speed of the fan, mass flows of two fans and two radiators change about 10% from 0 to 70 km/h of vehicle speeds, and the total mass flow of two radiators is nearly stable. For the radiators and fans, the change rate of cooling air mass flow between the simulation and experiments are less than 5% when vehicle speeds change from 0 to 70 km/h.