NUMERICAL FLOW SIMULATION OF ROTATING CIRCULAR SAW BLADES FOR THE INVESTIGATION OF SOUND GENERATION MECHANISMS
Journal Title: Journal of Machine Engineering - Year 2018, Vol 18, Issue 1
Abstract
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.
Authors and Affiliations
H. -Christian MÖHRING, Thomas STEHLE, Kamil GÜZEL, Christoph ZIZELMANN
Keywords
Related Articles
- EP ID EP269970
- DOI 10.5604/01.3001.0010.8823
- Views 88
- Downloads 0
INFLUENCE OF LINEAR FEED DRIVE CONTROLLER SETTING IN CNC TURNING LATHE ON THE STABILITY OF MACHINING
The paper deals with the influence of linear feed drive controller setting of a CNC turning lathe on the stability of machining. A coupled simulation model of feed drive control and ball screw drive mechanics with a tra...
AUTOMATED ROOT CAUSE ANALYSIS OF NON-CONFORMITIES WITH MACHINE LEARNING ALGORITHMS
To detect root causes of non-conforming parts - parts outside the tolerance limits - in production processes a high level of expert knowledge is necessary. This results in high costs and a low flexibility in the choice o...
UTILISATION OF IOT AND SENSING FOR MACHINE TOOLS
Strong requirements for automation in the production processes using machine tools have been increasing due to lack of high-skilled machining engineers. Automation used to be utilised in mass production, but it is also n...
THE EFFECT OF CHANGES IN DEPTH OF CUT ON SURFACE ROUGHNESS IN MACHINING OF AISI 316 STAINLESS STEEL
Currently, process optimization is an important part of design of CNC toolpath, allowing overall process improvement in accordance to a range of criteria. Available CAE software for CNC toolpath optimization works only b...
DESIGN APPROACH FOR HIGH-DYNAMIC PLANAR MOTION SYSTEMS BASED ON THE PRINCIPLE OF KINEMATICALLY COUPLED FORCE COMPENSATION
Machine tools’ feed dynamics are usually limited in order to reduce excitation of machine structure oscillations. Consequently, the potential increase in productivity provided by direct drives, e.g. linear motors, cannot...