Numerical flow simulation of rotating circular saw blades for the investigation of sound generation mechanisms

• Autorzy: Möhring H.-C. , Stehle T. , Güzel K. , Zizelmann C.

Identyfikatory

DOI

10.5604/01.3001.0010.8823

• Języki publikacji: EN

Abstrakty

EN

Emission of airborne sound in the production industry is endangering the employees’ health and is lowering productivity. Circular saw blades in particular cause high sound pressure levels. Therefore, the tool geometry of saw blades should be improved in the sense that the emission of airborne sound is lowered. In this work, the basics for the tool optimization regarding the emission of airborne sound are elaborated. To avoid high costs for various prototypes and experimental investigations, a computational fluid dynamics (CFD) simulation is used. By this, the effects of the adjustments of the geometry on the fluid mechanics can be researched efficiently. Using the acoustic analogy of Ffowcs-Williams/Hawkings, the results of the numerical flow simulation are converted into the sound pressure level. To validate the calculated results, previously conducted experiments are used for comparison. The calculated results correspond well to the values from the experimental measurements. Hence, it is possible to use the developed method to predict the influence of geometry adjustments on the acoustic behaviour, making the optimization process possible. In an outlook, the concept for an optimization loop is explained, which couples the CFD simulation with a parameterized geometry model and an evaluation algorithm.

Słowa kluczowe

EN

flow simulation; emission of airborne sound; acoustic examination

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2018
• Tom: Vol. 18, No. 1
• Strony: 61--71
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Möhring H.-C.

• University of Stuttgart, Institute for Machine Tools (IfW), Stuttgart, Germany

autor

Stehle T.

• University of Stuttgart, Institute for Machine Tools (IfW), Stuttgart, Germany

autor

Güzel K.

• University of Stuttgart, Institute for Machine Tools (IfW), Stuttgart, Germany

autor

Zizelmann C.

• University of Stuttgart, Institute for Machine Tools (IfW), Stuttgart, Germany

Bibliografia

• [1] KUOLT H., 2006, Geräuschentstehung und Maßnahmen zur Lärmminderung an Holzbearbeitungsmaschinen, Dissertation Universität Stuttgart.
• [2] HEISEL U., STEHLE T., 2013, Entwicklung einer auf Druckluft basierenden Methode zur Lärmminderung an rotierenden Werkzeugen, Abschlussbericht zum Forschungsvorhaben HE, 1656/121-2.
• [3] STEHLE T., HEISEL U., BIRENBAUM C., 2011, Simulation und experimentelle Untersuchung von Kreissägeblättern. Holztechnologie, 52/3, 15-21.
• [4] STEHLE T., HEISEL U., BIRENBAUM C., 2013, Simulative Untersuchung von Kreissägeblättern, wt Werkstattstechnik online, 103, 1/2, 69-75.
• [5] FFOWCS-WILLIAMS J.E., HAWKINGS D.L., 1969, Sound generation by turbulence and surfaces in arbitrary motion. Royal Society Publishing London (A), 264, 321-342.
• [6] LIGHTHILL M.J., 1952, On sound generated aerodynamically. I. General theory, Royal Society Publishing London (A) 222, 564-587.
• [7] LIGHTHILL M.J., 1952, On sound generated aerodynamically. II. Turbulences as a source of sound, Royal Society Publishing London (A), 222, 1-32.
• [8] KÖLTZSCH P., 2004, Geräuschentstehung durch Strömungen – Grundlagen und Überblick, Vortrag zur Tagung, Aeroakustik, Haus der Technik Essen, Stuttgart.
• [9] BLAGA A., TALPEANU D., STEHLE T., 2015, Chip loosening factor and chip size distribution during the circular sawing of wood and wood materials, Holztechnologie, 57/1, 23-30.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).