Zhi-Qian Zhang
Institute of High Performance Computing
A*STAR
Singapore
Title: Design, simulationand optimization of asupersonic shot peening nozzle
Biography
Biography: Zhi-Qian Zhang
Abstract
Shot peening is a cold working process, which is widely used in aerospace industry in order to enhance the fatigue life span of metallic components.In the shot peening process, peens are accelerated by air flow and directed onto the surface of the work piece by a nozzle. The shot peening performance can be measured by peening intensity and coverage. The peening intensity is determined by the impact velocity of the peens to the target surface. Under certain operational conditions (i.e., operational air pressure and media flow rate of peens), the design of the interior contour of the nozzle will significantly influence the maximum peen velocity.Moreover, in supersonic shot peening process, the optimal design of the nozzle interior contour is crucial to suppress the shock waves in wide range of operational air pressure. To evaluate the performance of the nozzle by studying the impact velocity, impact angle, peening pattern, coverage ratio and so on, an accurate and efficient simulation platform based on ANSYS/Fluent isdevelopedto simulate the multi-phase flow in subsonic/supersonic shot peening process.A new interior contour design of a supersonic shot peening nozzle is proposed so as to achieve the maximum impact velocity of peens to the target plane under the given operational condition.
