关键词: 坦克行驶, 外流场, 扬尘, 浓度分布, 气体与固体两相流, 数值模拟

Abstract: The changes of outflow field caused by tank moving and the concentration distribution of dust at different wind speeds and mass flow rates are simulated using ANSYS Fluent software based on the theory of gas-solid two-phase flow. The generation mechanism of dust caused by tank moving in a typical battlefield and the laws of dust concentration distribution under the influences of different factors are studied, which can provide theoretical support and data reference for laboratory simulation of dust caused by tank moving. The results indicate that a large number of turbulent eddies generated at its tail and sides during tank moving are one of the main reasons to cause the movement of dust particles. The greater the wind speed is, the lower the dust concentration at the center of tank tail is, the higher the dust concentration at the sides of the tank tail is, and the more rapidly the concentration changes. When the dust flow rate is higher, the dust diffuses more fastly, and the average dust concentration increases linearly with the increase in the mass flow rate. The average dust concentration at other mass flow rates can be calculated based on the average dust concentration data at a certain mass flow rate. Key

Key words: tankmoving, outflowfield, dust, concentrationdistribution, gas-solidtwo-phaseflow, numericalsimulation