Investigation on drag reduction on rotating blade surfaces with microtextures

Autor: Qinsong Zhu, Chen Zhang, Fuhang Yu, Yan Xu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Beilstein Journal of Nanotechnology, Vol 15, Iss 1, Pp 833-853 (2024)
Druh dokumentu: article
ISSN: 2190-4286
DOI: 10.3762/bjnano.15.70
Popis: 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.
Databáze: Directory of Open Access Journals