Simulation Study On Debye Effect Magnetic Field Of Submarine

The high-salt seawater is filled with a large amount of sodium ions and chloride ions.These ions are not only charged but also of different quality.The thrust formed by the submarine during underwater movement will accelerate the ions and separate the positive and negative ion centroids to form a polarized current,further generating a special magnetic field,called the Debye Effect Magnetic Field.The Debye effect magnetic field is different from the hull magnetic field caused by the ferromagnetic material on the submarine.The formation mechanism is more complicated and the corresponding signal characteristics are more abundant.Since the Debye magnetic field is independent from the submarine material,as long as the motion is generated,a new field source can be used for submarine detection.However,at present,its propagation characteristics are still unclear and need to research.This paper will study the mechanism and modeling methods of Debye magnetic field.The main work is as follows:First,according to the physical model,the expression of the Debye effect magnetic field is derived by force analysis of the ions.The Debye magnetic field model involving the water flowing,electric field and magnetic field is established from the excitation source of the water flow field to the micro current density,to the electro-magnetic electromagnetic field,to the physical quantity transfer chain of the detection signal.Secondly,the research and implementation method of the German-effect magnetic field simulation involving multi-physics coupling is proposed innovatively,and the physics coupling problem is solved.Secondly,the fluid simulation is carried out by computer simulation,and the flow field characteristics of the submarine in seawater are studied using FLUENT software.The focus is on the submarine model similarity criterion determination,the propeller high-precision slip grid,the force balance matching in the submarine movement,etc.,and the submarine flow field simulation model is established.The pressure field distribution,velocity field distribution,velocity field time-frequency domain signal is analyzed,and the distribution characteristics of submarine flow field are obtained.Finally,the submarine flow field is used as the excitation source of Debye magnetic field.According to the magnetic field transfer equation of Debye,the simulation calculation of Debye magnetic field is carried out by MATLAB programming.The characteristics of the Debye magnetic field are analyzed in detail,and the clear line signals and the wake signal generated by the propeller are extracted.The effects of different speeds and paddle speeds on the Debye magnetic field are compared.The simulation results show that the Debye magnetic field has good frequency domain characteristics,and based on this characteristic,it can provide strong support for submarine detection.