【作者】 孙秀君；

【导师】 孙海鸥；

【作者基本信息】 哈尔滨工程大学 ， 轮机工程， 2006， 硕士

【摘要】 潜艇主减速器及循环滑油舱中的润滑油在高温下产生的油雾，扩散到机舱中，不仅浪费了润滑油资源，并且严重污染潜艇舱室内空气，危害舱室工作人员的身体健康，更为严重的是通过通风系统扩散到其他舱室，将对电子设备产生严重的腐蚀，影响潜艇的战斗力。目前，离心式油气分离器作为除油设备被应用于潜艇上。 油气分离器是一种利用气液两相流体的旋转运动，使液体油滴在离心力的作用下从气流中分离出来的设备。油气分离器的工作过程是一种极其复杂的三维强旋转湍流、两相分离运动，因此很难通过解析的方法预报内部流动状况。由于实验条件的限制，单纯通过实验来研究离心分离器的性能不仅周期长而且费用高。数值计算技术具有资金投入少、设计计算速度快、信息完全、仿真模拟能力强等特点。因此，用湍流数值模拟方法研究分离器内流体的流动规律，进而优化分离器的结构，可以大大缩短其研发周期，具有重要的工程应用价值。 本文利用计算流体力学CFD商业软件FLUENT对潜艇上使用的油气分离器内部流场进行了数值模拟。不仅建立了研究分离器内部流动性能和分离性能的合理模型和方法，而且模拟研究了多种情况下的气相流场、压降、颗粒运动轨迹及分离效率等，为优化设计更高除油效率的分离器提供参考，以更好地改善潜艇舱室空气质量，为提高潜艇的战斗力提供保证。通过本文的数值模拟结果，主要得到了如下结论： 1．对于分离器内部复杂流场的模拟，必须以高质量的网格为前更多还原

【Abstract】 The lubricating oil mist which produces under the high temperature in the submarine’s main gear box and the circulating lubricating oil tank diffuses to the rooms of the submarine. The oil mist does not only waste the lubricating oil resources, but also pollutes the air of the rooms, and will be harm to the health of the staff in the submarine. More serious thing is that the oil mist will diffuse to other rooms through ventilating system, erode electronic installation, and influence battle effectiveness of the submarine. At present, centrifugal oil-air separator is applied to the submarine to eliminate the oil mist.Oil-air separator is a sort of equipment that makes the air and oil droplet revolve together and makes the oil droplet separate from the mixture in the function of centrifugal force. Its work-process is a most complex three-dimension movement of revolving turbulence and two-phase separation. So it is very difficult to predict the law of flow with parse means. The study on performance of separator simply by experiment has a long term and expensive consumption. Numerical simulation technology has many merits, for example, the devoted finance is less, the speed of design and computation is quick, the information is full and the ability of simulation is better. Therefore, studying on the law of the turbulent flow in oil-air separator with numerical simulation and then optimizing its configuration, may shorten the period of study and design of separator greatly. This has important application worth in engineering.This article does the research on the oil-air separator used in the submarine using FLUENT, the business software of CFD. The article does not only offer the logical model and method to simulate the oil-air separator, but also does the research on the flow of air,更多还原