关键词: 气固两相流;钢化玻璃;有机玻璃;冲蚀;损伤机理

Abstract: According to the characteristics of sandstorm environment in the central and western Inner Mongolia,using sand-air injection method,the influence law of erosion mechanics parameters on the erosion rate of engineering glass with different characteristics was compared and analyzed by erosion test rig for simulating sandstorm environment. The damage mechanism was analyzed combining with scanning electron microscope (SEM). The results show that the erosion rate of tempered glass increases with the increase of erosion angle and reaches the maximum value at 90 ° ,which shows the characteristics of brittle materials. The erosion rate of Perspex increases first and then decreases with increasing erosion angle, reaching the maximum value at 45 ° and the minimum value at 90 ° ,showing the characteristics of the semi-plastic material. The erosion rate of two kinds of glass decreases rapidly and then tends to be gentle with the increase of sand flow rate,and increases with the increase of velocity. At high angle erosion,the velocity exponents of the erosion fitting curve of tempered glass and Perspex are close to each other, which are respectively 3. 94 and 3. 66,deviating from the theoretical prediction range. High-angle erosion of tempered glass is serious,and its surface erosion damage mechanism is that the residual stress related to the plastic zone produces transverse cracks in the impact site and the crack propagates continuously to cause the material loss. The low angle erosion of Perspex is serious,and its damage mechanism is mainly micro-cutting,and the damage degree is controlled by the hardness of the material.

Key words: gas-solid two-phase flow;tempered glass;Perspex;erosion;damage mechanism