船式拖拉机气层减阻影响因素分析与参数优化研究

针对船式拖拉机船壳在水田泥浆环境中作业行进阻力大的问题,对船式拖拉机船壳气层减阻进行研究。通过构建仿真模型,对影响气层减阻性能的泥浆来流速度和气流量两个因素进行分析,并对船壳底板凹槽结构进行参数优化,研究不同深度凹槽结构的气层减阻性能。研究结果表明:泥浆来流速度增大在一定程度上会使气层产生破裂,导致总阻力增大,而气流量大小则直接影响气层的覆盖率。其中0.03 m凹槽深度船壳结构的减阻效果最好,绝对减阻率值为27.2%。

Research on influencing factors and parameter optimization of boat-type tractors using air layer drag reduction

Aiming to solve the problem of high traveling resistance of boat-type tractor bottom plate in a complex mud environment,the drag reduction of boat-type tractor air layer was studied.Through the construction of a simulation model,the two main factors affecting the air layer drag reduction performance were analyzed.In the optimization design of the groove structure of the ship bottom,the air layer drag reduction performance of the groove structure of the hull bottom at different depths was studied through simulation experiments.The research results showed that the increase in the inlet velocity causes the air layer to rupture,resulting in a decrease in the drag reduction rate.The airflow directly affects the air layer coverage.The 0.03 m groove depth has the best drag reduction effect with a value of 27.2%.