Influence of Grid Motion Mode upon Numerical Calculation of Fuselage Resistance for an Amphibious Aircraft
In order to improve the accuracy of hydro-resistance prediction for an amphibious aircraft,the overall dynamic grid method,conventional dynamic grid method and overlapping grid method were adopted to conduct the numerical simulation by using viscous fluid dynamics software STAR-CCM+.The influences of different grid methods on the distribution of water vapor,the shape of wave generation and the numerical prediction of resistance were analyzed,and verification of different grid methods was made through the towing tank model test results.It was shown that under low speed navigation and high-speed taxiing condi-tions,the difference in resistance values calculated by the three different grid motion methods is relatively small and close to the experimental values,however,in transition phase of taxiing,difference in calculation values of the three grid motion modes is significant,and the calculation results of the overall dynamic grid method are in good agreement with the experimental values,in-dicating that the overall dynamic grid method is more reliable for the fuselage resistance calculation of amphibious aircraft.
fuselage of the amphibious aircraftnumerical simulationgrid motion moderesistancemodel test
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