短舱对螺旋桨滑流影响的IDDES数值模拟

发布时间：2018-06-14 10:19

本文选题：螺旋桨 + 短舱　；参考：《航空学报》2016年06期

【摘要】：基于非结构重叠网格技术,对短舱与螺旋桨滑流间的相互作用进行了非定常数值模拟研究。为了更好地捕捉螺旋桨尾涡的细节信息,计算采用基于Spalart-Allmaras模型的改进延迟脱体涡模拟(IDDES)方法,并在非定常计算过程中运用网格自适应技术以提高流场特征的空间分辨率。研究结果表明:IDDES方法获得的拉力系数计算值与实验值吻合良好,短舱的存在会增大螺旋桨的拉力系数;短舱对螺旋桨桨毂涡的结构影响较大,但对桨尖涡的螺旋结构影响较小;对单独螺旋桨算例来说,桨尖涡与桨毂涡的失稳发展过程都具有周期性,且在有/无短舱情况下桨尖涡的失稳位置相同,失稳后桨尖涡之间配对融合过程一致,从而说明桨毂涡对桨尖涡的失稳没有影响。
[Abstract]:Based on the unstructured overlapping grid technique, the unsteady numerical simulation of the interaction between the short tank and the propeller slip flow is carried out. In order to capture the details of propeller wake, an improved delayed detached vortex simulation (IDDES) method based on Spalart-Allmaras model is used to improve the spatial resolution of flow field features. The results show that the calculated tensile force coefficient obtained by the ratio IDDES method is in good agreement with the experimental value, and the presence of the short cabin will increase the drag coefficient of the propeller, while the short cabin will have a great effect on the structure of the propeller hub vortex, but has little effect on the helical structure of the propeller tip vortex. For a single propeller, the instability development process of tip vortex and hub vortex is periodic, and the instability position of tip vortex is the same in the case of / without cabin, and the process of matching and fusion between tip vortices after instability is the same. Therefore, the impeller hub vortex has no effect on the instability of propeller tip vortex.
【作者单位】：厦门大学航空航天学院;
【基金】：航空科学基金(20155768007) 中央高校基本科研业务费专项资金(20720140540,2013121019) 福建省高校产学研重大课题(2015H6023)~~
【分类号】：V211.3

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