Study of Ship Thermal Wake Detecting Technique

The ship thermal wake is formed by the disturbance of ship propeller and vortex motion produced by ship moving.In this paper the characteristics of ship thermal wake are introduced,the measuring system for the thermal and electrical conductivity wake is developed and the ship thermal and electrical conductivity wake is measured.It is showed that there exist obvious thermal and electrical conductivity signals in ship wake.The larger the temperature stratification is,the greater the thermal wake signal will be and the bigger the ship is,the stronger the thermal wake signal will be.The ship thermal wake can be detected by the temperature and electrical conductivity sensors with high sensitivity and resolution and it can be used as a new wake homing method for torpedo