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首页> 外文会议>16th Annual technical conference and exposition of the American Filtration and Separations Society >USE OF COMPUTATIONAL FLUID DYNAMICS IN THE DESIGN OF ENGINE LUBE CENTRIFUGES
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USE OF COMPUTATIONAL FLUID DYNAMICS IN THE DESIGN OF ENGINE LUBE CENTRIFUGES

机译：计算流体动力学在发动机润滑离心机设计中的应用

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摘要

Centrifuges have been employed as bypass "filtration" devices to remove contaminants fromrnengine lube oil for several decades. Despite this lengthy application history, very little has beenrnpublished on the various complex and non-intuitive flow phenomena that occur inside centrifugernrotors. Fleetguard has refined the analysis techniques that enable commercially availablerncomputational fluid dynamics (CFD) software (Fluent 6.0) to reach converged steady-state flowrnsolutions in these mathematically "unstable" configurations. The instability is caused by thernextremely high radial pressure gradient induced by centrifugal force on the fluid. The flow andrnparticle-tracking simulations provide a highly enlightening "open window" into the nonobservablernworld inside a spinning centrifuge rotor. Examples will be shown illustratingrnvarious fluid flow phenomena in conventional centrifuge rotors, ConeStaCTM rotors and otherrnnew internal design configurations, as well as the aerodynamic phenomena in the interface zonernbetween a rotor and its housing. These CFD-enabled insights, along with quantitative outputrnfrom parametric analyses have been invaluable in improving centrifuge performance, validatingrnand calibrating simplified analytical models, and in reducing product development time.
机译：离心机已被用作旁路“过滤”装置，以去除发动机润滑油中的污染物已有几十年了。尽管有漫长的应用历史，但关于离心转子内部发生的各种复杂且非直觉的流动现象的报道很少。 Fleetguard完善了分析技术，使市售的计算流体力学（CFD）软件（Fluent 6.0）能够在这些数学上“不稳定”的配置下达到收敛的稳态流量解决方案。这种不稳定性是由离心力作用在流体上引起的极高的径向压力梯度引起的。流动和颗粒跟踪模拟为旋转离心机转子内部的不可观察范围提供了一个非常启发性的“打开的窗口”。将显示示例，以说明常规离心机转子，ConeStaCTM转子和其他新的内部设计配置中的各种流体流动现象，以及转子与其外壳之间的界面区域中的空气动力学现象。这些基于CFD的见解以及参数分析的定量输出对于提高离心机性能，验证和校准简化的分析模型以及减少产品开发时间都具有不可估量的价值。

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