悬浮溶液等离子射流场中粒子运动及相变特性的研究

In the Youth Science Fund, the atomization models of Newtonian and viscoelastic fluid have been established, the movement as well as heat and mass transfer models of suspension droplets have been proposed, which filled the gaps in these fields. Furthermore, the numerical programs of atomization spray and suspension plasma spray have been improved to analysis the effects of operating conditions and liquid physical properties for both normal and high temperature conditions. Finally, the empirical formulae have been given to predict the atomization effects and judge the deposition property of droplet onto surface. Under the subsidizing of Youth Science Fund, the applicant published 7 papers as the first author and 1 paper as the second author. All the 8 papers are cited by SCI. the applicant applied for 4 state invention patents, three of them have been authorized. The project research achievements have been awarded the second prize of scientific research in Zhejiang colleges in 2012. In the continuous project, the phenomenon of secondary atomization and collision for viscoelastic droplets will be detailed investigated by experimental and theoretical approaches, in order to establish corresponding models. The computation domain of radio frequency plasma spray will be extended to the quenching chamber and the chemical vapor condensation models will be established. In addition, the comprehensive numerical program of radio frequency suspension plasma will be improved by adding considerations of deposition and condensation. The scope and selecting basis of operating parameters that affect the final state of the particles will be proposed.

在青年基金中，建立了牛顿流体和粘弹流体的一次雾化模型，提出了悬浮液滴运动及传热传质模型，填补了该领域的空白，完善了泡状雾化射流和悬浮溶液等离子射流的数值程序，分析了常温和高温情况下工况及物性参数的影响，给出了预测雾化效果和喷涂效果的经验公式。基于该项目支持，申请人以第一作者发表SCI论文七篇，合作发表SCI论文一篇，申请发明专利四项，其中已授权三项。项目研究成果获2012年浙江省高等学校科研成果二等奖。在连续项目中，拟采用实验及理论研究分析粘弹流体液滴的二次雾化及液滴之间的碰撞现象，建立相应模型；并扩展射频感应等离子射流的计算区域至冷凝腔体，建立化学蒸汽冷凝结晶模型。此外，针对喷涂和冷凝合成，完善射频感应悬浮溶液等离子射流场的综合数值模拟程序，提出影响颗粒最终状态的工况参数的选择依据和范围。

悬浮溶液等离子射流场中粒子运动及相变特性的研究围绕着非牛顿流体雾化，高温环境下粒子运动及相变特性等问题展开。项目的研究成果包括 1. 建立Oldroyd-B流体液滴破碎和液滴两两碰撞模型，编写调试粘弹流体雾化射流的综合程序。2.采用高速摄像仪，相位多普勒粒子分析仪，粒子成像测速场仪等设备对雾化射流外部流场进行实验测量。3.研究粘弹流体液滴破碎模态，采用耦合的体积函数法和水平集方法对液滴破碎形态进行数值模拟。4.完善射频感应悬浮溶液等离子射流的综合数值模拟程序，建立了预测颗粒最终状态的相关临界参数和准则等。项目的研究成果建立了液滴破碎模态和综合数值运算程序之间的数学模型，填补了该领域的空白，并通过工况参数的计算分析，提供了通过控制工况条件和初始条件来得到理想颗粒状态的有效途径。在执行期内，项目负责人已发表SCI论文5篇，录用1篇，受邀参与编写专著一部，参加国内及国际学术会议6次，申请发明专利7项，已授权2项，培养研究生8人，开展了多次国际交流与访学，所有经费开支均在预算之内。