| Citation: | YANG Jian, FU Lihua, LIU Xiaolong, et al. Analysis on the static and dynamic aerodynamic characteristics of the logarithmic spiral airfoil[J]. Journal of Aerospace Power, 2026, 41（6）：20240660 doi: 10.13224/j.cnki.jasp.20240660
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The logarithmic spiral airfoil exhibits high flow efficiency and low flow resistance, making it highly practical to develop new profiles and their design methods. The nonlinear least squares method was employed to perform parameter inverse identification on the relevant coefficients of the logarithmic spiral airfoil for constructing a theoretical model of the logarithmic spiral airfoil profile, by using the characteristic points, maximum thickness, and its position of NACA0012 baseline airfoil as constraints. Meanwhile, a finite volume calculation model for the static and dynamic aerodynamic characteristics of the logarithmic spiral airfoil was constructed based on nested grid and dynamic grid methods. Subsequently, the mesh-independence validation, experimental validation, and static and dynamic aerodynamic characteristics analysis were carried out. The findings demonstrated that the calculated results agreed well with the experimental data. Under varying Reynolds number conditions, the logarithmic spiral airfoil demonstrates the capacity to attain commendable static and dynamic aerodynamic characteristics, with a notable enhancement in the peak dynamic lift coefficient and dynamic stall angle compared with the static conditions (Up to 44.6% and 50% respectively). The logarithmic spiral airfoil exhibited substantial potential for application, and the research outcomes can serve as a valuable reference for novel airfoil design.
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