Investigation on drag reduction on rotating blade surfaces with microtextures.

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Beilstein Journal of Nanotechnology Pub Date : 2024-07-10 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.70
Qinsong Zhu, Chen Zhang, Fuhang Yu, Yan Xu
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引用次数: 0

Abstract

To enhance the aerodynamic performance of aero engine blades, simulations and experiments regarding microtextures to reduce the flow loss on the blade surfaces were carried out. First, based on the axisymmetric characteristics of the impeller, a new simulation method was proposed to determine the aerodynamic parameters of the blade model through the comparison of flow field characteristics and simulation results. Second, the placement position and geometrical parameters (height, width, and spacing) of microtextures with lower energy loss were determined by our simulation of microtextures on the blade surface, and the drag reduction mechanism was analyzed. Triangular ribs with a height of 0.2 mm, a width of 0.3 mm, and a spacing of 0.2 mm exhibited the best drag reduction, reducing the energy loss coefficient and drag by 1.45% and 1.31% for a single blade, respectively. Finally, the blades with the optimal microtexture parameters were tested in the wind tunnel. The experimental results showed that the microtexture decreased energy loss by 3.7% for a single blade under 57° angle of attack and 136.24 m/s, which was favorable regarding the drag reduction performance of the impeller with 45 blades.

利用微质材料减少旋转叶片表面阻力的研究。
为了提高航空发动机叶片的气动性能,研究人员进行了有关微混合物的模拟和实验,以减少叶片表面的流动损失。首先,根据叶轮的轴对称特性,提出了一种新的模拟方法,通过流场特性和模拟结果的比较来确定叶片模型的气动参数。其次,通过对叶片表面微纹理的模拟,确定了能量损失较小的微纹理的放置位置和几何参数(高度、宽度和间距),并分析了其减阻机理。高度为 0.2 毫米、宽度为 0.3 毫米、间距为 0.2 毫米的三角形肋条的阻力降低效果最好,单个叶片的能量损失系数和阻力分别降低了 1.45% 和 1.31%。最后,采用最佳微纹理参数的叶片在风洞中进行了测试。实验结果表明,在 57° 攻角和 136.24 米/秒的条件下,微纹理使单个叶片的能量损失降低了 3.7%,这对 45 片叶片的叶轮的减阻性能是有利的。
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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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