Title: Modelling and simulation of the airflow field in wedge-shaped zone during the high-speed grinding
Authors: Changhe Li; Zhenlu Han
Addresses: School of Mechanical Engineering, Qingdao Technological University, 266033, China ' School of Mechanical Engineering, Qingdao Technological University, 266033, China
Abstract: In the high-speed grinding, as the grinding wheel rotates at a high velocity, an air boundary layer is formed on the grinding wheel surface, that is, the airflow field. In a wedge-shaped clearance between the workpiece and grinding wheel, in particular, the pressure and velocity field of the boundary layer rapidly change. Moreover, obvious reflux occurs in the wedge-shaped clearance, which seriously restricts the effective injection of the grinding fluid. In this paper, the mathematical model of the airflow field in the wedge-shaped zone based on the boundary layer and fluid dynamics theory, and simulation study was conducted. The findings demonstrate that as the peripheral velocity of the wheel increased, the airflow pressure in the wedge-shaped increased accordingly, as well as the airflow velocity. When the minimum clearance between the wheel and workpiece decreased, the airflow pressure airflow velocity along the horizontal direction and the vertical direction in the wedge-shaped zone increased significantly. In addition, the reflux tended to be more intense and the energy of the flow field increased.
Keywords: high speed grinding; airflow field; wedge-shaped zone; airbond; boundary layer; mathematical modelling; simulation; fluid dynamics; simulation; peripheral velocity; wheel speed; airflow pressure; airflow velocity.
International Journal of Abrasive Technology, 2013 Vol.6 No.2, pp.114 - 131
Received: 28 Feb 2013
Accepted: 06 Jun 2013
Published online: 05 Jul 2014 *