某发动机空滤器的CFD优化设计

Optimization of a Engine Air Filter by CFD

应用流体力学软件FLUENT,对某发动机空滤器内部不可压缩、湍流流场进行三维数值模拟和结构优化。计算中对滤芯采用多孔介质模型,着重分析了空滤器内部的压力场分布、速度场分布;对入口管、出口管和入口管与腔体连接位置进行优化,并分析不同方案下空滤器的流场及其管道的流动阻力损失和空滤器滤芯流体的速度均匀性,再进行CFD仿真计算验证,最终得出了一个流场和阻力损失都合理的模型;优化方案对改善空滤器的阻力损失和滤芯前速度均匀度取得了显著效果。

Using the fluid software FLUENT, the three -dimensional turbulent flow field of an air filter is numerically simulated and optimized, in which the filter is simulated by the porous model. The internal pressure and velocity distribution are analyzed. The inlet tube, the outlet tube and the chamber entrance location are optimized and the air filter and its inlet and outlet pipes were carried out to analyze the flow resistance losses in them and filter flow uniformity and validated through further CFD validated. Ultimately an optimized model with rational internal flow field and pressure losses is achieved. The resistance loss of the air filter and the entrance uniformity of the filter are significantly improved.