说明：  利用Carla进行三维造型、用Fluent仿真模拟作为辅助手段来设计进气道。在分析总结螺旋进气道 结构特点的基础上，针对小型柴油机的特点，设计出了引导管较短、较陡的螺旋进气道，建立了该进气管的3一D模 型，并借助Fluent软件对该气道内的气流进行了仿真模拟，得到了对进气道结构改进有价值的结论。
(Carla use three-dimensional modeling, simulation with Fluent as an adjunct to design the inlet. In summary analysis of the structural characteristics of the spiral inlet, based on the characteristics of small diesel engines, designed the guide tube is shorter, steeper spiral inlet, the establishment of the intake manifold 3-D model, and with the Fluent software the airway flow were simulated, the conclusion of the inlet structure has been improved valuable.)