In RTM process,the condition,which the flow of resin in the pipeline accords with the Darcy's law is laminar fluid movement,and the Reynolds number is less than 1.This paper used the finite element method by changing the size of length and diameter of the import and export pipeline,simulated the flow of the resin in the pipeline.In the result,the relationship of the speed on the exports and Reynolds number,also the scope of flow rate of the resin in the pipes can be gained.The test result shows that:exit velocity has little to do with the length,but the ra- tio of pipeline diameter.When the diameter of imports is 6 mm、10mm、16mm and 20mm,and the diameter of exports is 6 mm,10mm and 16 mm respectively,the maximum speed is 694.442 mm/s,416.667 mm/s and 260.414 mm/s.
