Mechanism of Water Spray Generated by Aircraft Chine Tire Running on Wet Runway

The spray water generated by aircraft tire might lead to the compressor surge or even flameout if it entering aircraft engines. The previous test and numerical simulation result show that chine tire could reduce the angle between spray water and ground, which could reduce the chance of water entering engines. The related researches are still inadequate nowadays. In this paper, the mechanism of water spray that is influenced by chines is investigated by coupled smoothed particle hydrodynamics (SPH) and finite element (FEM) method in LS-DYNA software. Firstly, the numerical model of aircraft tire and the load applying method are improved and validated, and then the model is used to analyze the influence of aircraft velocity on water spray angle. Secondly, based on the analysis of velocity of fluid particles, the water deflecting mechanism of chine is proposed. The velocity variation of fluid particles with different water depth is compared to illustrate this mechanism. At last, an optimized shape of chine is proposed based on the study of the influence of chine height and angle on water spray.