چكيده انگليسي :
Abstract
Among the problems with submersible torpedoes is the discussion of the friction force of
contact with water, and in the sense of the high post-war power in these missiles. In the new
generation of torpedoes, the idea was that, if a torpedo can move in contact with the surface of the
water, in the clouds of air or water vapor, it does not exist and moves at a much higher pace. In the
most advanced torpedoes, the current method is the sodium injection at the tip of the torpedo that
is produced by the sodium reaction with H2 gas, which can create the desired bubble cloud.
The idea behind this project is to use ultrasonic technology instead of sodium metal injection.
Therefore, using the relevant physical foundations and explaining the theories in this particular
case, a sample of the vibrating cap is made and interacted with water. According to early
hypotheses about micro-events at the interface with water and shell shells (creating fine bubbles,
cavitation, or the effects of cutting viscosity and shear strength, etc.), the macroscopic effects
observed in the laboratory sample indicate that the creation of ultrasonic vibrations At the tip of
the torpedo it can be effective in reducing drag force.
