Numberical Simolationrta On Movement Charact Eristic Of The XCP Probe

The XCP probe has an important strategic significance in the national economy and social developmentand military. At the beginning of 21 century, the domestic began to research the XCP probe measurementstechnology, but there is no report on the underwater movement properties of numerical simulation andexperimental research of XCP probe in China, and the water flow characteristics of simulation studies aboutXCP probe are seldom-reported on abroad. In this paper, the study about the movement characteristics andhydrodynamic characteristic of the XCP probe were investigated systematically, using the CFD technologyestablish the probe hydrodynamic characteristic study of numerical simulation method with commercialsoftware Fluent. The study provide the reference on the probe structure optimization and sea test data analysisand new jettison probe.This paper analyzes the jettison Marine probe's numerical simulation technology of fluid characteristics,choosing a numerical simulation method and verify the method The research content as follows: (1) Acquiredthe depth - time curves and Reynolds number - resistance coefficient curve, and the test data consistent withthis simulation method to verify the correctness. (2) The probe structural design is reasonable according to theXCP probe flow field distribution. The arcof probe heads type design plays an important role on falling speed;although the tail of probe sacrifices the falling speed, while it can ensure probe stable plummeted stance. (3)Attack Angle can significantly change the flow field of symmetry. 0°- 10°Angle of attack, XCP probe dragcoefficient and lift coefficient increases with increasing attack Angle; 10°- 26°Angle of attack XCP probelift coefficients, with attack Angle increases, resistance coefficient increases while the overall increase in localreduce appeared in the process; 28°Angle of attack occur around flow separation, when more than 28°Angleof attack, probe after instability. (4) The flow field distribution, probe of drag coefficient and limit speedvalues under different speeds were obtained under rotating coordinates rotation. Rotation will make probe thewhole flow increases the circumferential velocity component, reduce probe falling speed; Exchange with therotating speed, probe resistance coefficient will increase, the limits of underwater stable movement speed whendecreases. Low speed probe falling speed decreases are not obvious, when above 15r/s speed probe fallingspeed dropped is significant. (5) The influence on hydrodynamic characteristic of XCP probe under differentseawater densities is obvious but the influence of different temperature can be ignored.Based on the hydrodynamic characteristic and work requirement, the optimum structural parameterswere obtained: (1) the probe head radian design for 27 degrees, by which the water in the probe has the leastresistance and can reach a larger drop speed. (2) electrode installation location should as far as possible in front,and intermediate conduit maximum limit signal distortion. (3) probe whereabouts speed of 13r/s aroundselection for can satisfy the requirements of the vertical resolution of 0.3 m.