离子液体改性燃料的电流体动力学效应研究

戚晗轩; 李金展; 刘奥; 武颖韬; 李建玲; 汤成龙; 黄佐华

doi:10.7652/xjtuxb202607007

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离子液体改性燃料的电流体动力学效应研究

专题燃烧调控 | 更新时间：2026-07-09

- 离子液体改性燃料的电流体动力学效应研究
- Research on the Electrohydrodynamic Effects of Ionic Liquid-Modified Fuels
- 西安交通大学学报 2026年60卷第7期页码：69-76
- 作者机构：
  
  西安交通大学能源与动力工程学院，710049，西安
  西北工业大学动力与能源学院，710072，西安
- 作者简介：
  
  作者简介：戚晗轩（2001—），男，硕士生；
  武颖韬（通信作者），男，副教授，硕士生导师。
- 基金信息：
  
  国家自然科学基金资助项目(U2241255;52236001)
- DOI：10.7652/xjtuxb202607007
  中图分类号： TK401
- 收稿：2025-10-17，
  
  纸质出版：2026-07-10
- 稿件说明：
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戚晗轩, 李金展, 刘奥, 等. 离子液体改性燃料的电流体动力学效应研究[J]. 西安交通大学学报, 2026,60(7):69-76.

QI Hanxuan, LI Jinzhan, LIU Ao, et al. Research on the Electrohydrodynamic Effects of Ionic Liquid-Modified Fuels[J]. Journal of Xi'an Jiaotong University, 2026, 60(7): 69-76.
戚晗轩, 李金展, 刘奥, 等. 离子液体改性燃料的电流体动力学效应研究[J]. 西安交通大学学报, 2026,60(7):69-76. DOI： 10.7652/xjtuxb202607007.

QI Hanxuan, LI Jinzhan, LIU Ao, et al. Research on the Electrohydrodynamic Effects of Ionic Liquid-Modified Fuels[J]. Journal of Xi'an Jiaotong University, 2026, 60(7): 69-76. DOI： 10.7652/xjtuxb202607007.

摘要

为明确离子液体改性燃料在静电场中的运动机制，实现静电场对微尺度流场运动行为的高效调控，采用粒子图像测速技术对针-板电极结构附近介电燃料液体中产生的电流体动力学效应进行表征，研究了不同电场施加条件及离子液体改性对流体运动特性的影响。研究结果表明，高压静电场作用下，外加电压幅值及电极间隙可显著影响介电液体流动特性，流场扰动速度随电压和间隙的增加而增大。通过添加离子液体对燃料液体进行改性，发现混合溶液黏度随离子液体的体积分数增加呈非线性增长特征，电导率呈现先上升后下降的非单调变化趋势。与传统添加高电导率液体增强电流体动力学效应不同，离子液体的引入会在电极附近形成由阴、阳离子定向运动产生的反向屏蔽电场，形成局部电场屏蔽作用，抑制溶液的电流体运动特性，添加体积分数为1%的离子液体后，在电场作用下，溶液流速降低91.9%。该研究揭示了离子液体改性对燃料电流体动力学行为的调控机制，为发展新型电控燃料喷射或微流体驱动技术提供了理论依据与实验支撑。

Abstract

To clarify the motion mechanism of ionic liquid-modified fuels in electrostatic fields and to efficiently regulate the fluid motion behavior of the micro-scale flow field under electrostatic fields，the electrohydrodynamic（EHD）effects generated in dielectric fuel liquids near a needleplate electrode structure were characterized using particle image velocimetry（PIV）.The effects of varying electric field conditions and ionic liquid modification on fluid motion characteristics were systematically investigated.The results show that under high-voltage electrostatic fields，the flow characteristics of the dielectric fluid are significantly influenced by the applied voltage magnitude and electrode gap.Furthermore，the flow disturbance velocity rises as the voltage and electrode gap increase.Through the modification of fuel liquids with ionic liquids，it was observed that the viscosity of the blended solution increases nonlinearly with the volume fraction of the ionic liquid，while the electrical conductivity varies non-monotonically with ionic liquid fraction，first increasing and then decreasing.Contrary to the conventional enhancement of EHD effects via highly conductive additives，the addition of ionic liquids was found to generate a reverse shielding electric field near the electrodes due to the directed migration of anions and cations.This results in a local electric field shielding effect that suppresses the EHD motion characteristics of the solution.Specifically，with the addition of 1.0% volume of ionic liquid，the flow velocity of the solution under the electric field was reduced by 91.9%.This research elucidates the regulatory mechanism of ionic liquid modification on the EHD behavior of fuels，providing a theoretical basis and experimental support for the development of novel electronicallycontrolled fuel injection and microfluidic drive technologies.

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