2022
DOI: 10.3390/pr10030522
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Hot-Wire Investigation of Turbulence Topology behind Blades at Different Shape Qualities

Abstract: The scope of this paper is to perform a detailed experimental investigation of the shape error effect on the turbulence evolution behind NACA 64-618 airfoil. This airfoil is 3D-printed with predefined typical shape inaccuracies. A high-precision optical 3D scanner was used to assess the shape and surface quality of the manufactured models. The turbulent flow was studied using hot-wire anemometry. The developed force balance device was provided to measure the aerodynamic characteristics of the airfoil. Experime… Show more

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Cited by 11 publications
(6 citation statements)
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“…2) comes from the noise, not being a sign of ideal isotropic turbulence. The flow past an airfoil (such as turbine blade) is strongly anisotropic, as observed by other authors [24], [25] and by us as well [26] [27]. The size of coherent structures is quantified in terms of autocorrelation function in Fig.…”
Section: Anisotropymentioning
confidence: 56%
“…2) comes from the noise, not being a sign of ideal isotropic turbulence. The flow past an airfoil (such as turbine blade) is strongly anisotropic, as observed by other authors [24], [25] and by us as well [26] [27]. The size of coherent structures is quantified in terms of autocorrelation function in Fig.…”
Section: Anisotropymentioning
confidence: 56%
“…What characterizes the smallest size of vortices which cause the dissipation of kinetic energy of the flow into heat. According to paper [14], the value of η can be found from the equation:…”
Section: Resultsmentioning
confidence: 99%
“…They were produced of polymerized lactic acid (PLA) by 3D printing technology using the PRUSA i3 printer. In the general case, at 3D printing, the manufactured models are characterized by high surface roughness Ra ≈ 21.8 μm [12,13]. Therefore, with the help of P2500 sandpaper with low abrasiveness, we have reduced the roughness to Ra ≈ 3~5 μm.…”
Section: Methodsmentioning
confidence: 99%