The Numerical Simulation Of The Airflow Of Ships Sailing In The Wind And Waves

The carrier-borne aircrafts, takeoff or landing on the vessels, need the safe airflow field offered by the vessels. The vessels have the rocking motion; even the movement with vast scale in the voyage, Therefore, the airflow field around the real carrier-borne aircrafts gets the influences from wind, waves and ship motion. Only simulating the real airflow field can evaluate the distribution and quality of airflow field and then guide ship design and aircraft commanding, providing the safety guarantee for the takeoff and landing of aircrafts.This paper applies sticky fluid mechanics theory and chooses VOF method and the turbulence model in the numerical simulation of sea surface with two phases of gas and liquid to separately probe the - 3°to 3°roll motion of vessels, - 1.5°to 1.5°pitch pole movement and the airflow field under the function of oblique wind and oblique wave with 20°from right to left and the airflow field under the windward function. In view of the above conditions it respectively discusses the numerical methods of grid division and quality and the convergence of results to simulate the distribution of airflow field of aircrafts. It also discusses the influence of ship rocking motion, wind and wave on the airflow field.The research shows that the change of roll angle has little influence on the airflow field over the ship deck and pitch pole movement can cause the upturned deck and the obvious change of airflow field in the ship tail. The negative pitch angle of vessel causes the tail air speed to increase, and the waves made behind the ship body and the deck can produce the airflow whirlpool against the landing of aircrafts; the positive pitch angle causes the air speed in the ship stem to grow, and the more angles the ship tail is, the more speed air speed has. The study on the influence of oblique wind and waves on the airflow field of vessels shows that when the waves by 20°from right to left, the roll wind speed over the vessel deck passes the utmost limit of safety for aircraft takeoff, and the wave from one side of stem is higher, causing the whirlpool beside the unwrap deck. It shows from the numerical simulation of airflow field of carrier-borne aircrafts under the windward that it is feasible to simulate the number of airflow field applying the the show that the incident boundary method under the koinonia of wind and wave.The paper lays a foundation for further study and provides reference for the related research.