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Sensitivity of Aerodynamic Characteristics of Paraglider Wing to Properties of Covering Material

Maślanka Paulina, Korycki Ryszard

Autex Research Journal

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2022

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Vol. 22, no. 1

64--72

EN

The paper is theoretically oriented. The main goal is to analyze the sensitivity of aerodynamic characteristics to the properties of the material used for paraglider wing. The paraglider of considerable dimensions is designed without stiffening elements. Thus, the covering material yields adequate pressure distribution between the external and internal parts of the wing. The problem is solved using a geometrical model approximated by the dimensionless coordinates of crucial points and smoothed by spline curves. The finite volume mesh is defined using the Ansys Meshing program. Numerical analysis uses five different covering materials, ranging from the air-impermeable covering to the covering subjected to hydrolytic-mechanical degradation. Optimization of properties of the covering material improves the lift force and the aerodynamic characteristics of the wing. Moreover, numerical modeling is more beneficial and efficient than prototype tests. The obtained pressure distributions and other parameters explain the aerodynamic safety of the paraglider during dynamic conditions of flight.

2

Estimation of Seams in Paraglider Wing

Maślanka Paulina, Korycki Ryszard, Szafrańska Halina

Autex Research Journal

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2022

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Vol. 22, no. 4

383--390

EN

The aim of the article is to analyze the seams connecting the covering textiles in paraglider wing and estimate their physical strength. The most extreme flight parameters (the angle of attack and velocity) in the numerical model of the wing allow the determination of the mean pressure inside the contour and the maximal difference between the pressures on the inner and the outer material surfaces. The preprocessing stage and numerical calculations in Ansys environment consider three different covering materials. The tool Porous Media is used to create the objects of a given value of air permeability. The estimated parameter of seam is the maximal pressure difference between both sides of the covering material, which that interacts with the test results. The quality index of the seam is defined by the maximal force to seam rupture and relative elongation during rupture. The obtained results indicate that the seams are resistant to the pressure difference caused by the most extreme flight parameters.

3

Textile Cover Effect on Aerodynamic Characteristics of a Paraglider Wing

Maślanka Paulina, Korycki Ryszard

Fibres & Textiles in Eastern Europe

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2019

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Vol. 27, no. 1 (133)

78--83

EN

Defined herein are the two PA-fabrics covering a paraglider wing, with the comparative object being permeable clothing material. The material parameters of textiles are applied in numerical simulations of aerodynamic characteristics using the program ANSYS. The state variable is the pressure within the airfoil profile. The space model of a paraglider wing and plane model of its cross-section in the symmetry plane are analysed. The model was approximated by the coordinates of crucial points and smoothed by the spline-curves. The visualisation of stream filaments shows that it is advisable to cover the wing with the impermeable fabric.

PL

W pracy zdefiniowano dwie tkaniny pokrycia skrzydła paralotni wykonane z poliamidu, obiektem porównawczym był przepuszczalny materiał odzieżowy. Parametry materiałowe tekstyliów zastosowano w symulacjach numerycznych charakterystyk aerodynamicznych z wykorzystaniem programu ANSYS. Zmienną stanu było ciśnienie w profilu skrzydła. Analizie poddano przestrzenny model skrzydła paralotni i płaski model jego przekroju poprzecznego płaszczyzną symetrii. Model został przybliżony przez współrzędne punktów węzłowych i wygładzony za pomocą krzywych typu spline. Wizualizacja strug elementarnych pokazała, że celowe jest pokrywanie skrzydła tkaniną nieprzepuszczalną.