Laser-induced fluorescence thermometry of supercritical CO2 flows inside a micro-channel

2021 ◽  
Vol 46 (8) ◽  
pp. 1924
Author(s):  
Suhyeon Park ◽  
Anatoly Parahovnik ◽  
Yoav Peles ◽  
Subith S. Vasu
Keyword(s):  
Supercritical Co2 ◽  
Laser Induced Fluorescence ◽  
Micro Channel ◽  
Fluorescence Thermometry

scholarly journals Comparison of line-peak and line-scanning excitation in two-color laser-induced-fluorescence thermometry of OH

2009 ◽  
Vol 48 (32) ◽  
pp. 6332 ◽  
Author(s):  
Stanislav Kostka ◽  
Sukesh Roy ◽  
Patrick J. Lakusta ◽  
Terrence R. Meyer ◽  
Michael W. Renfro ◽  
...  
Keyword(s):  
Laser Induced Fluorescence ◽  
Line Scanning ◽  
Fluorescence Thermometry

scholarly journals Improving thermal performance of micro-channel electronic heat sink using supercritical CO2 as coolant

2019 ◽  
Vol 23 (1) ◽  
pp. 243-253 ◽  
Author(s):  
Jahar Sarkar
Keyword(s):  
Heat Source ◽  
Thermal Resistance ◽  
Heat Sink ◽  
Supercritical Co2 ◽  
Heat Transfer Fluid ◽  
Inlet Temperature ◽  
Sharp Change ◽  
Micro Channel ◽  
Pumping Power ◽  
Flux Flow

In view of increasing tendency of power density of electronic systems, cooling performance improvement of micro-channel heat sink is an emerging issue. In the present article, supercritical CO2 is proposed as a heat transfer fluid in micro-channel heat sink for power electronics cooling. Energetic and exergetic performance analyses of micro-channel heat sink using supercritical CO2 have been done and compared with conventional coolant, water. To take care of sharp change in properties in near critical region, the discretization technique has been used for simulation. Effects of both operating and geometric parameters (heat flux, flow rate, fluid inlet temperature, channel width ratio, and channel numbers) on thermal resistance, heat source (chip) temperature, pressure drop, pumping power and entropy generation are presented. Study shows that the thermal resistance, heat source temperature and pumping power are highly dependent on CO2 inlet pressure and temperature. Supercritical CO2 yields better performance than water for certain range of fluid inlet temperature. For the studied ranges, maximum reduction of thermal resistance by using CO2 is evaluated as 30%. Present study reveals that there is an opportunity to use supercritical CO2 as coolant for power electronic cooling at lower ambient temperature.

Evaluation of nitric oxide laser-induced fluorescence thermometry techniques in a hypersonic boundary layer

2020 ◽  
Vol 61 (4) ◽  
Author(s):  
Connor C. McDougall ◽  
W. Schuyler Hinman ◽  
Craig T. Johansen ◽  
Brett F. Bathel ◽  
Jennifer A. Inman ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Boundary Layer ◽  
Laser Induced Fluorescence ◽  
Hypersonic Boundary Layer ◽  
Fluorescence Thermometry

scholarly journals Laser induced fluorescence thermometry with OH (2, 0) band excitation

2016 ◽  
Vol 11 (4) ◽  
pp. JFST0022-JFST0022
Author(s):  
Teppei YANO ◽  
Sadatake TOMIOKA ◽  
Yohei KINO ◽  
Yoshio NUNOME
Keyword(s):  
Laser Induced Fluorescence ◽  
Fluorescence Thermometry
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