Flow Field Analysis Inside and at the Outlet of the Abrasive Head
Open Access
- 14 July 2021
- Vol. 14 (14), 3919
- https://doi.org/10.3390/ma14143919
Abstract
This paper focuses on the investigation of a multiphase flow of water, air, and abrasive particles inside and at the outlet of the abrasive head with the help of computational fluid dynamics calculations and measurements. A standard abrasive head with a water nozzle hole diameter of 0.33 mm (0.013”) and an abrasive nozzle cylindrical hole diameter of 1.02 mm (0.04”) were used for numerical modelling and practical testing. The computed tomography provided an exact 3D geometrical model of the cutting head that was used for the creation of the model. Velocity fields of abrasive particles at the outlet of the abrasive head were measured and analysed using particle tracking velocimetry and, consequently, compared with the calculated results. The calculation model took the distribution of the abrasive particle diameters with the help of the Rosin-Rammler function in intervals of diameters from 150 to 400 mm. In the present study, four levels of water pressure (105, 194, 302, 406 MPa) and four levels of abrasive mass flow rate (100, 200, 300, 400 kg/min) were combined. The values of water pressures and hydraulic powers measured at the abrasive head inlet were used as boundary conditions for numerical modelling. The hydraulic characteristics of the water jet were created from the measured and calculated data. The calculated pressure distribution in the cylindrical part of the abrasive nozzle was compared with studies by other authors. The details of the experiments and calculations are presented in this paper.Keywords
Funding Information
- Czech Science Foundation (No. 18-25035S)
- Czech Academy of Science (RVO:68145535)
This publication has 25 references indexed in Scilit:
- Determination of vibration frequency depending on abrasive mass flow rate during abrasive water jet cuttingThe International Journal of Advanced Manufacturing Technology, 2014
- ANALYSIS OF PARAMETERS AFFECTING THE QUALITY OF A CUTTING MACHINEActa Polytechnica, 2014
- Modelling of abrasive particle energy in water jet machiningJournal of the American Academy of Dermatology, 2013
- Three-Dimensional CFD Simulation of Two-Phase Flow Inside the Abrasive Water Jet Cutting HeadInternational Journal for Computational Methods in Engineering Science and Mechanics, 2008
- A study of abrasive waterjet characteristics by CFD simulationJournal of the American Academy of Dermatology, 2004
- Experimental analysis of high-speed air–water jet flow in an abrasive water jet mixing tubeFlow Measurement and Instrumentation, 2004
- Computational Fluid Dynamics (CFD) Simulation of Ultrahigh Velocity Abrasive WaterjetKey Engineering Materials, 2003
- Energy transfer during the mixing of air and solid particles into a high-speed waterjet: an impact-force studyExperimental Thermal and Fluid Science, 2001
- Theoretical analysis of the particle acceleration process in abrasive water jet cuttingComputational Materials Science, 1996
- Two-equation eddy-viscosity turbulence models for engineering applicationsAIAA Journal, 1994