Study Of Location Optimization And Error Correction For Ship Wind Measurement Based On Flow Field Simulation

In the course of ship sailing on the sea,the wind speed and direction information is an indispensable sea surface information.It not only relates to the navigational safety of the ship,but also provides auxiliary information for the operation of the carrier-based aircraft around the ship.Due to the influence of the ship structure,the flow field around the ship will change,and the accuracy of the wind measurement data is closely related to the selection of the wind measurement point.Therefore,it is necessary to reasonably determine the layout plan of the wind measurement position based on the characteristics of the flow field.Besides,the accuracy of wind measurement is also affected by other factors and it is necessary to correct the wind data.On the basis of sufficient investigation of relevant literature and data,the flow field characteristics around the ship are obtained.Based on the simulation calculation of the flow field,and the optimization of the location of the ship's wind measurement and the error correction of the wind data are studied,providing technical support for the ship's wind measurement.First of all,based on the CFD theory,the Standard k-? turbulence model and the FLUENT software are used to simulate the full size of the typical frigate SFS2,the results were compared with the experimental data,and the validity of the mathematical model and the research method is verified.Then on the basis of the analysis and discussion of the common layout scheme for the location of the ship's wind measurement,analyzed the characteristics of the LHA-1 amphibious assault ship,a relatively reasonable wind measurement location layout scheme was proposed.Through the flow simulation,the variation of the flow field characteristics of the ship under the wind speed and the wind direction is determined.The disturbance of the turbulence around the ship is analyzed,the layout of the wind measurement is determined,and the reasonable length of the wind stand support is selected in the range of the stability of the wind data.Finally,on the basis of a large number of simulation results,wind speed and wind direction data are obtained.The wind velocity and wind direction correction formulas for the wind position in the typical wind direction angle range are obtained by the partial least square method.It can significantly reduce the error between wind speed and wind direction and true wind.The research results in this paper can provide reference for the formulation of wind measurement program for large ships and the correction of wind measurement data.