LED chip cooling system using ionic wind induced by multi-wire corona discharge

A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

“…However, when the needles are arranged densely, the mutual interference between the electric fields of the emitting electrodes is extremely significant, and the calculated results are not applicable. For the mutual interference between the emitting electrodes, our research group recently designed a T-shaped multiwire IWG, in which each wire electrode corresponds to a pair of parallel plates for heat dissipation of a 24 W LED chip [5]. The relationship between the airflow characteristics inside the IWG and electrode configuration was revealed through numerical simulations.…”

“…Its microscopic principle is the momentum transfer from ions produced in the discharge to neutral molecules or atoms through collisions between them, thus resulting in a type of airflow. The main characteristics of this electrohydrodynamic (EHD) effect are silent operation [1][2][3][4], no moving parts, fast response [5,6], low-cost maintenance [7], low-energy consumption [8], and compact structure [9]. Its generation principle and characteristics indicate that it has a wide range of applications in many fields, such as heat transfer enhancement [10][11][12], electrostatic precipitation [13,14], food drying [15][16][17][18], water collection [19][20][21][22], aerodynamic flow control [23,24], and electric propulsion [25][26][27][28][29].…”

Fog Droplet Collection by Corona Discharge in a Needle–Cylinder Electrostatic Precipitator with a Water Cooling System

“…The advantages of ionic wind include fast response [13], low-cost maintenance [14] and lowenergy consumption [15]. Ionic wind, namely the secondary flow induced by an electric field, is a physical phenomenon caused by the collision between charged particles and gas molecules produced by corona discharge under a nonuniform electric field.…”

“…Ionic wind, namely the secondary flow induced by an electric field, is a physical phenomenon caused by the collision between charged particles and gas molecules produced by corona discharge under a nonuniform electric field. Ionic wind generated by corona discharge has been intensively applied for heat transfer enhancement for many years [13,[16][17][18][19][20][21], for it can disturb the boundary layer on the airside of the heat exchanger [22,23]. The principle of electrostatically enhanced fog collection is similar to that of the electrostatic precipitator (ESP): by applying an external electric field to ionize the gas, the fog droplets are charged, and these charged droplets are captured on the collection plate under the combined action of the electric field force and drag force of the airflow [22].…”

“…Electrohydrodynamics (EHD) is related to a type of low-temperature plasma in plasma science and ionic wind generators (IWGs) are the application of the EHD phenomenon [12]. The advantages of ionic wind include fast response [13], low-cost maintenance [14] and low-energy consumption [15]. Ionic wind, namely the secondary flow induced by an electric field, is a physical phenomenon caused by the collision between charged particles and gas molecules produced by corona discharge under a nonuniform electric field.…”