Simulating Heat Transfer of Water-jacket Exhaust Manifold with Liquid-solid Coupling Method
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摘要: 以某型发动机水套式排气歧管为研究对象,运用三维建模软件UG,建立了水套式排气歧管的管壁、内部烟气和冷却水的几何模型并进行组装。利用GAMBIT软件划分网格,并应用FLUENT软件模拟排气歧管的流体流动和传热以及流体与排气歧管之间的耦合传热,得出内部流场和温度场分布状况。结果表明:水套式排气歧管表面温度不超过423 K,满足安全防爆的要求。Abstract: This paper studies the water-jacket exhaust manifold on a certain engine. With the help of the 3D modeling UG software,the 3D models of the wall,inner gas and inner cooling water of the water-jacket exhaust manifold are established separately; then,the 3D models are assembled. This paper also divides a mesh by using the GAMBIT software and simulates the fluid flow,heat transfer and coupled heat transfer between the water-jacket exhaust manifold and its fluid by using the FLUENT software,thus obtaining the inner flow field distribution and the temperature field distribution. The simulation results show that the surface temperature of the water-jacket exhaust manifold does not reach 423 K. This meets the explosion-proof requirement.
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Key words:
- boundary conditions /
- computer simulation /
- computer software /
- flow fields
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