论文部分内容阅读
为了分析流体流动过程,降低流动阻力,提出了流动速度与速度梯度在整个流动区域内协同的概念,认为流体在流动过程中所受的阻力不仅受流动速度和速度梯度的影响,同时也取决于它们之间的协同程度.在此基础上,提出了流体流动过程中的最小机械能耗散原理,认为在整个流动区域内,流动速度与速度梯度的协同程度越低,流体流动过程中的黏性耗散越小,流体阻力也越小.同时,根据最小机械能耗散原理,在一定约束条件下对黏性耗散函数求极值,获得了流体流动场协同方程,求解场协同方程获得了最佳流场,使流体在流动过程中的黏性耗散取最小值,流动阻力最低.最后,以并联管路的流量分配为例,根据最小机械能耗散原理对速度分配器进行了优化设计,降低流体在并联管路中的流动阻力.
In order to analyze the fluid flow process and reduce the flow resistance, the concept that the flow velocity and the velocity gradient are synergistic in the whole flow area is proposed. It is considered that the resistance of the fluid in the flow process is affected not only by the flow velocity and the velocity gradient, but also Based on which the principle of minimum mechanical energy dissipation in the fluid flow process is proposed, and it is considered that the lower the synergy between the flow velocity and the velocity gradient in the entire flow area, the lower the viscosity in the process of fluid flow According to the principle of least mechanical energy dissipation, the viscosity dissipation function is obtained under certain constraints and the synergistic equation of fluid flow field is obtained, and the synergistic equation of the field is obtained Good flow field, so that the viscosity of the fluid flow in the process of taking the smallest value, the lowest flow resistance.Finally, the parallel pipeline flow distribution as an example, according to the principle of minimum mechanical energy dissipation speed distributor optimized design, Reduce fluid flow resistance in parallel lines.