关键词：油气分离器；分离效率；模型

Abstract: In this paper, we do CFD analysis for a diesel oil separator using CFD soft, we obtain the pressure distribution and the trace distribution through steady analysis, the separation efficiency through transient analysis. We make the oil separator test, and obtain the pressure loss and .We can get the following conclusions: it can get a good separation efficiency through setting the paddle and the hole in the separator; we can get evaluate the performance of the separator accurately according to the simulating results; we can select the appropriate separator for a engine quickly and accurately through the combination of the simulation and test.   

Key word: oil separator；the separation efficiency；model