Pressure Variation Model of an Underwater Vehicle through Multiple Motions using CFD simulation

An underwater vehicle operates efficiently in the water environment when it determines the speed and direction.In this article,we investigate the pressure variation model(PVM)of an underwater vehicle to predict its speed and direction.A series of pressure sensors located at the port and starboard sides along the submerged body is used to measure the variation of pressure surrounding the body.The dynamic pressure is a selection to consider as a function of the flow velocity acting on each pressure sensor.Due to the good accuracy and flexibility in motion simulation of the CFD(computational fluid dynamics)method,it is applied to execute the submerged vehicle motions from simple to complexes such as rectilinear,turning,gliding,and spiral motions.For each motion,motion variables including linear velocity,angular velocity,and angle are given to describe the trajectory as well as the characteristics of motions.Based on the results of pressure variation,pressure are big changed for the position the head and rear of AUV.The PVM is established considering the motion variables and positions of the pressure sensors.The PVM proposed is also used to determine the motion variables.