A numerical simulation method for soil cover cleaning of sea cables by movable jets
In working conditions,a high-pressure nozzle has lateral movement speed,making it difficult to predict the depth of the scour hole,resulting in incomplete cleaning of the surface cover of the marine cable.To solve this problem,an optimized theoretical model for predicting the flow field and the scour hole depth was established and validated by numerical simulation method.Firstly,an optimization model for the flow field of the nozzel was established and a prediction method for the scour hole depth was elaborated;Secondly,a numerical simulation model for the jet breaking soil was established,and four control parameters,namely jet pressure,nozzle diameter,nozzle lateral velocity,and soil shear strength,were selected to analyze the influence of different parameters on the scour hole depth.It shows that as the jet pressure and nozzle diameter increase,the depth of the scour hole increases gradually;As the lateral velocity of the nozzel and the shear strength of the earth increase,the depth of the scour hole decreases step by step.Finally,the theoretical results were compared with the numerical results,and the error was within the allowable range.This model can solve the problem of difficult prediction of scour hole depth and provide guidance for engineering applications.
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维普
