Energy effect and erosion mechanism associated with impact on solid surface by waterjet
1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：Using PDPA measurement technique and high-speed photography, the cross-sectional distributions of jet velocity were determined, and the fluctuations of jet stream profile were analyzed. The turbulent waterjet under consideration was produced at jet pressure of 280 MPa. The quartz sand particles were added into waterjet to generate abrasive waterjet to impact Al alloy plates. The resultant surfaces were examined by SEM and a 3D optical profiling system to obtain small-scale profiles. The results indicate that the continuous and concentrated segment of jet stream is significantly responsible for the impact capability of jet stream. The segment is featured by a center valley of turbulent RMS velocity distribution. The fluctuations of jet stream profile in longitudinal direction are statistically represented by gray scale values from high-speed images. The concentration level of jet stream can be described by gray scale values. Due to the cooperative action between high speed sand particles and waterjet, cutting traces, truncation traces and impact traces are evidently presented. The traces are definitely associated with the longitudinal distance between nozzle exit and solid surface.
康灿1, 刘海霞2, 周亮1, 杨敏官1. 水射流冲击固体表面的能量因素与冲蚀机理[J]. 江苏大学学报（自然科学版）, 2014, 35(2): 154-159.
Kang Can1, Liu Haixia2, Zhou Liang1, Yang Minguan1. Energy effect and erosion mechanism associated with impact on solid surface by waterjet[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2014, 35(2): 154-159.
2014, Vol. 35 
