A model for solving the heat transfer characteristics of brush seals based on three-dimensional solid modeling was established. The distribution characteristics of the flow field and temperature field of the brush seal were analyzed by verifying the accuracy of the numerical model. The influences of the pressure ratio

the rotational speed and the interference on the maximum temperature of the brush wire were studied. The heat transfer mechanism of the brush seal was revealed. The results showed that the end-discharge brush wire and the rotor face were mainly concentrated in the high temperature area of the bristle. The maximum temperature of the brush wire increased with the increase of the pressure ratio

rotational speed and interference

in which the interference had obvious influence on the maximum temperature. When the amount of interference increased from 0.1 mm to 0.7 mm

the maximum temperature increased 1.61 times; The main source of heat of the brush seal was generated by friction between the brush and the rotor surface

the heat transfer form of the brush seal included conduction heat and convection heat exchange. The friction heat flow entered the brush wire bundle and the rotating shaft through the heat conduction form. When the contact force between the brush wire and the rotor increased

the frictional heat flux increased

and the maximum temperature rose. The friction heat flowed through the heat transfer between fluid and solid transmission

and the main form of heat dissipation was the leakage of air taking away part of the heat.