학술논문
Local thermal measurements of a confined array of impinging liquid jets for power electronics cooling
Document Type
Conference
Author
Source
2015 31st Thermal Measurement, Modeling & Management Symposium (SEMI-THERM) Thermal Measurement, Modeling & Management Symposium (SEMI-THERM), 2015 31st. :228-234 Mar, 2015
Subject
Language
ISSN
1065-2221
Abstract
The local surface temperature, heat flux, heat transfer coefficient, and Nusselt number were measured for an inline array of circular normal jets of single phase liquid water impinging on a copper block. An experimental 2-D surface map was obtained by translating the jet array relative to the sensors. The effects of variation in jet height, nozzle length, and Reynolds number were investigated. The local maximum heat transfer coefficients were observed within the stagnation region for all configurations with secondary peaks occurring halfway between the jets. The maximum local heat transfer coefficient of 15,600W=m 2 K and local Nusselt number of 80.5 were observed for H/D n = 1, L n /D n = 2, and Re D n = 14,000; while the maximum surface average heat transfer coefficient of 13,700W=m 2 K and average Nusselt number of 71.0 were observed for H/D n = 3, L n /D n = 0, and Re D n = 14,000.