高速フレーム溶射ガンの流動特性に関する気体力学的研究

第1報, 貯気圧とバレル長さの影響

抄録

The High Velocity Oxy-Fuel (HVOF) thermal spraying is a technique to make a coating on a solid surface. The gun consists of a supersonic nozzle followed by a straight passage called barrel. In this study, the internal flow of HVOF gun was analyzed by the theory of Fanno flow and the flow patterns are classified depending on barrel length and chamber pressure. The analytical results were evaluated by the experimental results including pressure distributions in the gun and schlieren photographs of jet. The analytical results show good agreement with the experimental results except for the condition that shock train stays inside the barrel.