Research On Optimization Design Of Blast Deflector Cooling System

When the carrier-based aircraft take-off operation,the engine spurt high-speed(up to 600-1000m/s),high temperature(generally 700-1000℃)airflow,and the airflow will have a large influence on the surrounding personnel,equipment and other ship-borne aircraft.The use of the drift plate is to guide these high-temperature and high-speed jet upward,so as to achieve the protective effect.The body requires that when it is flat,it can withstand 20-30 tons of heavy objects from the above through,and can withstand about 400 KN jet thrust when it is completely raised,and the temperature of the blast deflector after the jet impingement can reach about 1000 K.Therefore,the mechanism is required to have considerable heat dissipation capacity and bearing capacity.In this paper,by analyzing the working principle of the motion actuator of the jet deflector device,the mechanism model of the mechanism is established.The kinematics of the mechanism is analyzed by graphic method,and the mathematical model of angular displacement,angular velocity and angular acceleration of the jet deflector is established by using analytical method.A triangular corrugated mezzanine plate structure was designed for the working condition of the cooling compartment of the deflector plate.The total bending characteristics of the sandwich panel were calculated under the wheel load.Based on CFD(Computational Fluid Dynamics)method,the cooling process of the cooling compartment of the cooling compartment under the high temperature and high speed airflow is simulated and analyzed.According to the temperature distribution of the cooling compartment,the flow velocity vector diagram and other information,designed the linkage cooling chamber program.An independent air cooling scheme is proposed in which the air is taken from the interspace between the plates in the low temperature region,and the core region of high temperature is cooled after being pressurized by the fan,and then the core region is cooled,and then the gas gap discharge directly from the plate to the deck.The whole structure of the cooling system is designed,and the internal flow and cooling effect of the cooling system are analyzed and evaluated by numerical simulation.In order to verify the correctness and accuracy of the numerical simulation,and to obtain quantitative and qualitative analysis,a test model of the deflector is designed and fabricated.The impact cooling of the jet is studied,which can provide reference for the future research.