低速ウォータージェットによる水中ロボットの推進機構

Abstract

Some underwater vehicles need propulsion system without propellers to install sensors at the tail and to avoid the entangled seaweeds. Pump jet propulsions are, however, not efficient at the low speed of vehicle. So the new pump jet system was considered to improve the efficiency. Thenew system for the underwater vehicle of lowspeed was proposed. The water jet experiment was conducted to verify the prediction method to design the new system. The high speed water jet was injected into the duct with Coanda nozzle and the duct flow was established. The experimental results agreed well with the prediction and the prediction method was expected to use for the design of new propulsion system.