Research On The Migration Law Of Flying Debris In Optical Fiber Ground Simulation

In order to simulate the real flight attitude and environment of the guidance fiber optic cable package,the simulation of the cable package’s laying out attitude must be carried out in a high and low temperature box.During the fiber optic detachment process,a large amount of flying debris will be generated,which will be bonded to the dynamic detachment force testing device and the pay-off trajectory camera device,making it unable to work properly.In response to the above issues,this article developed a flying chip blowing device based on the Bernoulli principle,which combines a central nozzle and a jet ring.A physical,mathematical,and finite element model of the flying chip blowing device was established,and the influence of different structural parameters on the distribution of gas phase flow field was analyzed.The migration law of flying chips was explored,and an experimental platform was built to achieve the blowing function of optical fiber flying chips.The main content is as follows:(1)Research on fly debris blowing plan: Based on the analysis of the wire laying process and fly debris generation process,the main functions and requirements for fly debris blowing have been clarified.Based on the Bernoulli principle,a fly debris blowing plan with a central nozzle and a jet ring has been determined,and preliminary simulation verification has been conducted on the plan.(2)Gas-phase flow field and flying debris movement model construction: Based on the flying debris blowing scheme,a physical model of the flying debris blowing flow field was constructed,and a physical model of the flying debris particle characteristics was established based on the characteristics of dense phase pneumatic conveying;In order to study the characteristics of gas-phase flow field and the migration law of flying debris,a mathematical model of gas-phase flow field and flying debris movement was established;And a finite element model of the gas phase flow field was constructed.(3)Flow field characteristics analysis: The inlet flow velocity was calculated through flow distribution.The flow velocity analysis was conducted on the gas phase flow field under different structures using the structural parameters of the center nozzle sleeve diameter,the distance from the center nozzle to the end face,the number and diameter of small holes in the jet ring,and the gap width of the jet ring.The strength of the Bernoulli effect,the presence of wall attached flow in high and low temperature chambers Screen the flow field based on four factors: the size of the high velocity radiation area and the distance of sedimentation,and obtain the optimal flow field distribution under the structural model.(4)Research on the migration law of flying debris: Based on the analysis of the forces acting on flying debris,simulation of the movement of flying debris clusters was conducted,and the migration process and deposition law of flying debris over time were studied.Based on the deposition law,simulation was conducted on the collection area of flying debris.The results show that gravity,drag force,pressure gradient force,and particle interaction force have a significant impact on the transport of flying debris;The migration amount of flying debris increases with the passage of laying time and the increase of axial distance along the package;The amount of wall deposition increases with the increase of laying time.Design an embedded cylindrical collection area on the ground based on transport laws,which can effectively collect flying debris.This study has guiding significance for the blowing off of flying debris generated during the ground simulation payoff process guided by optical fibers.