Research On Ice Active Early Warning Method For Airport Runway Pavement

With the vigorous development of civil aviation industry,the passenger traffic of airport is increasing,and the flights take-off and landing also become more and more frequent.At present,the airport,which has an annual passenger throughput of more than 5 million passengers,requires multi-team cooperative ice removal.Therefore,in order to ensure the safety and punctuality of the flight,it is particularly important to study the icing problem of the airport runway.The main contents of paper are as follows:Firstly,based on the theory of heat transfer and boundary layer movement,the icing growth rate of the pavement surface under different meteorological conditions could be obtained.In this way,the influence of various meteorological factors on ice accretion of the pavement surface could be grasped.Secondly,according to refrigeration thermal property of thermoelectric materials,the cold end of the active cooling structure was used to reduce the temperature of water film above the pavement surface to cause icing.By studying the energy balance relationship in the thermoelectric cooling circuit and heat transfer of icing environment,the active cooling equation under different meteorological conditions was established by coupling the former with the latter,and then freezing temperature of the airport pavement could be perceived actively in advance.Thirdly,by analyzing the interaction between the meteorological influence factors of ice accretion on pavement,a geothermal equilibrium model was obtained.And the study of the ground temperature at different depths showed that the interaction between meteorological factors presented a nonlinear relationship.Taking these meteorological factors and their corresponding high-order influencing factors as the combined influencing factors of predicting pavement icing,a combined prediction model of multivariate polynomial and BP neural network was established.Moreover,the model was numerically simulated to test its expressive ability.Finally,the icing prediction experiment system of the airport pavement was designed,and the simulated experimental platform of the experimental system was used to verify the models above mentioned.Furthermore,the validity of the active icing warning method for the airport pavement was verified.