Abstract
There are some ceramic coating methods to spray ceramic particles at room temperature by low-density supersonic jet. In order to increase the deposition efficiency of the sprayed particle, the impact velocity of the particle need to exceeds the threshold fracture velocity. The authors have clarified the gas dynamic condition to crush the ceramic particle at substrate by numerical simulation. However, the physical details of the tracking performance of the particle to the low-density gas flow remain unclarified. In this study, the tracking performance of the ceramic particle to the low-density supersonic jet flow is investigated by numerical simulation. It is concluded in this study that the worse tracking performance of the ceramic particle for the low-density jet flow, compared to that of the high-density jet flow, is mainly due to the low density of the jet flow.
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