侧后结合进气装置外流场数值研究

Numerical study on the outer flow field of lateral-backward air intake device

为探索一种新型侧后结合进气装置在船舶行驶过程中受不同风向影响下的性能,应用三维数值模拟方法结合标准k-ε模型,采用多面体网格在保证计算精度情况下得出两侧百叶窗关键气动参数的分布规律,并对比分析了不同风向下外流场结构的变化情况。计算结果表明,在保证两侧百叶窗进气流量相仿时侧向一侧气动参数变成正弦分布关系,变化幅度明显高于后向一侧,而后向一侧气动参数分布规律性较差但气动差异性小,而百叶窗口旋涡强度较高。

To explore the performance of a lateral-backward air intake device under the influence of different wind direction, using a three-dimensional numerical simulation method with the standard k-ε model and polyhedral grids, the article analyzes key aerodynamic parameter distributions of the lateral and backward shutters, and compares the structures of flow field under different wind direction changes. The results show that the changes of the aerodynamic parameters of lateral shutters in accordance with a sinusoidal relationship, and the magnitude of changes is significantly higher than the backward side which presents a poor regularity and a small difference of the aerodynamic parameter distributions, but with a high intensity of the vortex.