Abstract
The AUV (Autonomous Under-water Vehicle), which is used for present seabed investigations, has obtained the thrust with the screw drive by the battery. However, it has a disadvantage large and expensive. Therefore, this research is carried out to purpose the Bubble Jet Engine (BJE) as a new propulsion device. It can directly transform combustion energy into speed energy, so it is expected conceivable that BJE rises propulsion efficiency too. This research aims at measuring exhale flow and void to fraction design ejectors, which become the core of BJE, and exploring practical use possibility of BJE.
