The GTF (geared turbofan) engine fan drive gearbox simulation model was established. The flow and temperature fields of fan drive gearbox were simulated by using the RNG(renormalization-group) k -ε turbulence model and the MRF (multiple reference frame) model. The results showed that local eddy currents appeared in the engaging-in and engaging-out region of the external gearing of the gearbox

due to the vertical direction of the two chamfer planes and fluid velocity in which the oil distribution plate nozzle was located. The highest temperature of the fan drive gearbox occurred in the planetary gear

followed by the sun gear

and the lowest one occurred in the inner ring. The temperature of planetary bearing roller was higher than the inner and outer rings of the bearing. The temperature of the inner ring of the planetary bearing was lower due to the way of inner-ring oil supplying

and the temperature of the outer ring of the planetary bearing was affected by the bulk temperature of the planetary gear

which was higher than the inner ring temperature. The temperature of the planetary gear had a peak value in the middle of the tooth width direction. In the direction of tooth height

there was a high temperature peak near the top of the tooth of the planetary gear

and a relatively low temperature peak near the root position.