船式拖拉机气层减阻研究

为预估不同含水率的水田土壤气层减阻所需通气量,通过流变仪测得相应的水田土壤参数,并构建仿真模型进行了相应仿真试验.在试验过程中,分析了不同通气量下的船底气层覆盖情况以及不同通气量下的阻力变化,解释了其减阻机理,并采用公式的形式拟合了含水率与最优通气量的关系.研究发现:含水率为80％的水田土壤减阻率可以高达21.9％,对...

Research on Drag Reduction of Boat-type Tractor Using Air Layer

In order to predict the air volume needed for reducing resistance of paddy field air layer with different water content,the corresponding parameters of paddy field were measured by rheometer,and the corresponding simulation model was constructed for the corresponding simulation test.In the process of the test,the air layer coverage and the resistance change under different ventilation are analyzed,and the mechanism of drag reduction is explained.Finally,the relationship between the water content and the optimal ventilation is fitted by the formula.It is found that the drag reduction rate of paddy field with 80%water content can be as high as 21.9%,and the drag reduction effect of the air layer of paddy field with higher water content is not as good as that with higher water content;the drag reduction of the air layer mainly reduces the friction resistance,but the effect of the reduction of the viscous pressure resistance is not obvious,and the viscosity of paddy field has a greater impact on the viscous pressure resistance.