摘要
在不可动微阀性能优化问题的研究中,系统压差比越大,不可动阀的阻断性能越好。为提高不可动微阀的压差比,采用拓扑优化方法进行Tesla型不可动微阀的设计。针对直接采用不可压NS-Darcy方法优化易导致的渗透和数值不稳定问题,采用固相介质弱可压的松弛条件来获得固相低渗透效果的优化迭代解,建立了以正向能量耗散极小为目标函数,以表述阀效应的压差比为约束条件的优化模型。优化后Tesla阀在雷诺数为100时压差比提高到2.23,相较原始阀和其它已发表的优化结果,性能提高了56.5%。仿真结果表明,建立的优化模型可以得到高性能的阀体结构。
When designing and optimizing the no-moving-parts microvalves, the higher diodicity means the better blocking performance. This paper focused on designing Tesla-type no-moving-parts microvalves employing the topol- ogy optimization method to improve the diodicity. In order to avoid the numerical unstable and permeable problem when using incompressible NS-Darcy equation, a relaxation condition which makes the solid-phase slightly compres- sible was proposed. An optimization model was stablished with the minimum forward dissipation as objective and the diodicity as one of the constraints. The diodicity of the optimized valve can reach as high as 2.23 at Reynolds number 100, which is a significant improvement over 56.5% compared with original Tesla valve and other published results. Simulation results show that we can obtain a high performance valve using the improved optimization model.
出处
《计算机仿真》
CSCD
北大核心
2014年第3期367-370,共4页
Computer Simulation
基金
国家自然科学基金面上项目(50975272)
关键词
拓扑优化
渗透性
微阀
特斯拉阀
压差比
：Topology optimization
Permeability
Microvalve
Tesla valve
Diodicity
