高速水中水噴流の流動構造と損傷特性に及ぼすポリマ添加の影響

抄録

Experimental studies are carried out to clarify the effects of a polymer additive on the structure of a submerged water jet and the damage process of a metallic material. Tap water and an aqueous solution of polymer additive are pressurized up to 147 MPa and injected into still water at atmospheric pressure through a nozzle of 0.50 mm in diameter. Specimens of aluminum alloy are used for erosion tests. The structure of the submerged water jet is analyzed from instantaneous photographs. It is found that the structure of the submerged water jet is affected greatly by the addition of a polymer additive. Furthermore, the addition of a polymer additive improves the cutting and drilling capacity of the submerged water jet.