Research on Aerodynamic Characteristics of Water Surface Aircraft Based on Modified Aerodynamic Model
[Purposes]The real machine's scaled model is often used in the pool test to study the aerody-namic performance of surface vehicles.This study aims to study the problem that the aerodynamic lift co-efficient in the test data is small due to the difference in Reynolds number in the scaled model in the pool test,so as to achieve the purpose of accurately simulating the actual aerodynamic state of surface ve-hicles when they fly near the surface.[Methods]For a large amphibious aircraft model,this study in-creases the flap area and the lift area of the tail without changing the area of the wing and the average aerodynamic chord of the wing,and studies the model before and after modification by simulation and test.[Findings]The simulation results show that the difference of aerodynamic lift coefficients of the model before and after the modification is about 15%at different speeds and pitching angles.The test re-sults show that the lift coefficients of the modified model are in the same trend as the lift coefficients of the real machine in the wind tunnel data at different speeds,pitching angles and lifting rudder deflec-tions,with the maximum error at about 8%and the minimum error less than 1%.[Conclusions]The simu-lation results show that the modified scale model can effectively improve the aerodynamic lift of the model,and the test results show that the modified scale model can accurately reflect the aerodynamic performance of the real machine,which lays a foundation for optimizing the structure layout of surface ve-hicles and studying the aerodynamic characteristics of surface vehicles.
water surface aircraftaerodynamic performance testaerodynamic characteristicsaerody-namic compensation
NETL
NSTL
万方数据
