摘要
采用雷诺时均N-S方程、标准k-ε模型和SIMPLEC算法对液力缓速器内部流场进行了数值模拟,分析倾角为50°、55°、60°时液体流动的速度分布、压力分布和湍动能分布规律。以Rothalpy值的变化作为损失分析指标,定量比较不同倾角对制动力矩的影响,得出叶片倾角为55°时缓速能力最大,其原因是沿程摩擦阻力损失与冲击损失的叠加使得液力损失最大。
Hydrodynamic retarder under different vane degree condition was simulated. By using the timeaveraged N-S equation and the standard k-ε turbulence and the SIMPLEC algorithm simultaneously, the internal characteristics of flow field were simulated. The calculated velocity, pressure and turbulent kinetic energy distribution of the turbulent flow in hydrodynamic retarder were given. The method of loss analysis was proposed which changed value of Rothalpy was used to compare the retarder ability. The result shows that the model under 55° vane degree has the biggest impact because the loss of friction and impact made hydrodynamic loss most.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2009年第4期206-209,226,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
高等学校博士学科点专项科研基金资助项目(200602990110)
江苏大学博士生创新基金资助项目(1293000416)
关键词
液力缓速器
前倾角
湍流模型
数值模拟
Hydrodynamic retarder, Vane degree, Turbulent flow, Numerical simulation
