Numerical modelling the air flow in parts of air jet loom
Abstract
Paper summarizes the first results of two-dimensional (2D) numerically modelled expansion and flow of compressible and non-viscous gas in typical parts of air jet weaving system; namely in main nozzle designed as an ejector with various shapes of the mixing zone, in relay (auxiliary) nozzle with substantial flow separation in the rash flow bend directly before the nozzle outlet, and the influence of the reed dent edges shape on the free stream reflection and penetration through reed gaps along a real "porous" wali. The used Euler's equations are solved by a Finite Volumes Method (FVM) with automatic mesh generation and optimization of unstructured triangle mesh. Graphic cross-sections or surfaces can be obtained, too. They give to the designer a large and quick review about the problem. The coincidence with experiment, measuring and real weaving tests is very good. The advantage of numerical modelling consists in the very quick, simple and user-friendly operation.
References
[2] K. Adámek. Stafettendüsen hergestellt im Feingussverfahren. In: 6. Weberei Kolloquium, Inst. für Textil- und Verfahrenstechnik, ITV Denkendorf, 1990.
[3] K. Adámek. Channel relay jets. In: Textile Technology Int., 140-143, Sterling Publ., Ltd., London/Hong Kong, 1993.al results show 2D isolines of all gas state values, further Mach number, entropy and velocity vectors. lD profiles of all quantities along chosen
[4] P. Kolář. 3D Flow in Reed Channel. Research report for VUTS. TechSoft Engineering, Praha, 1996.
[5] V. Kopecky, K. Adámek. Using of LDA and hydraulic analogy in air jet weaving. In: Flow Visualization V. Proc. of the 5th Symp. on Flow Visualization, Prague, 1989, 703-710. Hemisphere Publishing, Co., New York, 1990.
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This work is licensed under the Creative Commons Attribution 4.0 International CC BY 4.0.
