轮胎滚动溅水与垂直入水相似性分析

The spray produced by aircraft tire running on wet runway may enter the inlet of engines, and lead to the compressor stall, surge, or even combuster flameout. Scholars used to study this problem by full-scale aircraft spray test, which may cost a lot, and get only a little valid data. According to the analysis of the interaction between tire and water, the similarities of the spray generation and propagation by tire rolling in the water and tire falling into water are proposed based on combining the strip method with the fluid similarity theory. Then the numerical models of an elastic chined tire rolling in the water and falling into water are established by coupled smoothed particle hydrodynamics (SPH) and finite element method (FEM) in LS-DYNA software. According to the numerical results, the mechanism of the side plume is given. The front views of the side plume in these two spray systems are compared to certify the similarity. At last, the test of tire falling into water is recommended to investigate the basic phenomenon of aircraft tire spray based on this kind of similarity.