Abstract
An abrasive water suspension jet (AWSJ) has a greater capacity for drilling and cutting than the abrasive water injection jet (AWIJ). The drilling capability of the AWSJ under submerged condition decreases steeply with the increase of the standoff distance. In order to expand the effective standoff distance of the AWSJ under submerged condition, a sheath AWSJ nozzle is proposed and the drilling capability of the sheath AWSJ nozzle is clarified through drilling tests with specimens of stainless steal.
