It is found that the ablated surface morphologies for both the ti samples of different roughness have a similar change trend from roughening to smoothing with increasing the shot number , where the surface roughening is relatively weaker at lower ion current density 通过辐照不同原始粗糙度的纯金属ti发现，随着辐照次数的增加，烧蚀表面形貌均发生表面粗糙化向光滑化的转变。离子束流密度较低时，辐照表面的粗糙化程度较弱。
To satisfy the practical need of internal cooling in turbine blades of aeroengine , some detailed experimental measurements on the discharge coefficients , pressure coefficients and flow field in the internal passages with both rib - roughened walls and film hole suctions under a wide range of aerodynamic parameters . and the interrelated numerical simulation was also been implemented 本文根据航空发动机中涡轮叶片内流冷却的实际需要，在宽广的气流流动参数范围内，对同时带肋和气膜孔出流的叶片内冷通道的流量系数、压力系数以及流场进行了详细的实验测试，同时还进行了相应的数值模拟计算。
