Kinetic energy of automobile could be transformed into heat energy when an eddy current retarder(ECR) starts braking.The temperature on the rotor plate rises rapidly to result in instable braking performance because of heat energy.For the above question,a cylindrical disturbance setup with forced heat dissipation is proposed to be installed in the rotor plate.To select the reasonable cylinder dimensions,the physical models of single tunnel are established.Heat exchange mechanism and performance of every mod...