Optimum Control of Plasma Flow Systems through Multi-Scale Integration

通过多尺度集成对等离子体流系统进行优化控制

基本信息

批准号：
17206016
负责人：
NISHIYAMA Hideya
金额：
$ 32.45万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17206016/
关键词：
Plasma Functional fluid Multi-scale Nanoparticle Complex interaction Interface Real time simulation Integration

项目摘要

In the present study, the plasma flow systems with multi-scale interactions are analyzed by using multi-scale control method and multi-scale integration to give the fundamental data for cold spray, plasma assist combustion, arc melting process and gas circuit breaker. The obtained results are as follows.1. An integrated model for advanced cold spray process is constructed by integrating nano-micro particle flow model and coating formation model. It is clarified that electrostatic acceleration of nano-particle is effective in the presence of shock wave. The deposition process in the cavity is also clarified by comparing with cold spray experiment.2. The pulsed arc torch and dielectric barrier discharge torch with small input power are developed to produce oxygen and nitrogen radicals and ozone for combustion assist. The effects of applied voltage and frequency on radical concentrations are clarified experimentally. Time evolution of chemical species in an air plasma are also clarified numerically using complex reaction model3. Real time simulations are conducted for purpose of compactness of gas circuit breaker (GCB) and optimization of arc melting process. It is clarified that rough structure in the exhaust tube enhances the rapid cooling of exhaust hot gas for compact GCB. It is shown that the temperature dependent surface tension and mushy zone effect the melting pool structure in an arc-melting systems.

在本研究中，通过使用多尺度控制方法和多尺度集成来分析具有多尺度相互作用的等离子体流量系统，以提供冷喷雾，血浆辅助燃烧，ARC熔融过程和气流断路器的基本数据。获得的结果如下1。通过整合纳米 - 微粒子流模型和涂料形成模型来构建用于晚期冷喷雾过程的集成模型。澄清说，纳米颗粒的静电加速度在冲击波的存在下是有效的。还通过与冷喷雾实验进行比较2。具有较小输入功率的脉冲电弧割炬和介电屏障排放火炬可产生氧气和氮自由基和臭氧以供燃烧。实验阐明了应用电压和频率对根部浓度的影响。还使用复杂反应模型3阐明了空气等离子体中化学物种的时间演化。进行实时仿真是为了使气体断路器（GCB）紧凑和弧熔化过程的优化。澄清说，排气管中的粗糙结构可增强用于紧凑的GCB的排气热气体的快速冷却。结果表明，温度依赖性的表面张力和糊状区域在电弧熔融系统中影响熔池结构。