A FAST PREDICTION METHOD FOR DROPPING WATER OF FIRE FIGHTING AIRCRAFT BASED ON EXTERNAL BALLISTICS OF PARTICLES

For the process of fire fighting aircraft water-dropping, this paper refers to the cylindrical jet atomization theory under transverse inflow, uses the KH-RT model of secondary jet atomization, the droplet breakdown theory, and the particle exterior ballistics to establish the related theory model, and develops a rapid prediction program for fire fighting aircraft water-dropping. The concentration distribution of the water body on the ground obtained from the fast prediction is in good agreement with the test results, and the shape and size of the water body are in good agreement with the experimental results. This verifies the feasibility of the fast prediction method of the theoretical model developed in this paper, and gives the defects of the model and the correctable methods. In addition, this paper uses CFD numerical simulation to simulate the launching process of L-188 fire fighting aircraft, verifies the accuracy and reliability of the two-phase flow model developed in this paper, and lays a solid foundation for further research.