Application Study On Numerical Simulation Of Resistance On The Pusher With Ratio Between Propeller Diameter And Ship Draft

On the situation of energy short, people pay more and more attention to energy conservation.The root of problem for marine energy-saving is ship resistance.The resistance of the push tug play an important role in the resistance of the pusher fleet,more than 30%. The diminution of resistance of the push tug can make more power of main machine to change the thrust of the push tug and reduce unnecessary expenses and improve the traffic efficiency.The optimization of ship is one of the primary measure of the reduce ship resistance.This paper is mainly about the study of the use of business software—FLUENT in numerical simulation of the push tug.And hope that it can make CFD became the one of the main method of the performance design of the push tug, and apply the foundation for the optimization of pusher and other inland ship with the tunnel stern.Turbulence model is the principal influence factor of the results of viscous numerical simulation.This paper use three k-epsilon (2 eqn) turbulence model to analog computation of the influence of the resistance of the 588KW push tug by modify the height of the tunnel stern,and it is as contrasted with same type experiment.The result of research show that the use of the technique of the CFD to compute the resistance of the push tug is relisble. And the use of the RNGκ-εis better than the other two k-epsilon (2 eqn) turbulence model.This paper also use the turbulence model to compute the influence of the 588KW push tug 600M push tug by modify the lengthof the tunnel stern,and show that the change of the length of the tunnel stern is not the major fator of the resistance of the push tug,but increase the the length of the tunnel stern can make the resistance of the push tug reduce. So this paper advice that we can appropriately increase the length of the tunnel stern. This paper hope that study of the use of CFD in numerical simulation of the push tug can act as a matting for next job,and it can give some advice to the performance optimization of the push tug.