Number：

04_04曾憲中

Download

摘要檔
全文檔

Name：

Sheng-Chung Tzeng

Titles：

Author：

Paper name：

Experimental analysis of mixed convection heat transfer on heat sink of led lamp

Name of activity：

Keywords：oscillation move,pin arrays,flow visualization,heat transfer,impinging jets

Abstract：This work experimentally investigated the effect of the reciprocating and oscillating move on the fluid flow characteristics and heat transfer enhancement of the pin arrays under impingement cooling condition.The forced convective cooling system usually applies the steady flow to pass through a stationary target.This work mounted vertically four sets of pin arrays on the four side walls of a square base.The base was installed at a reciprocating and oscillating move platform with symmetrical circular impinging jets.Variable parameters are the jet Reynolds number,the oscillating mode of platform,the oscillating frequency and the impinging distance.The experimental results indicate that the overall heat transfer of the oscillating pin arrays drop significantly by comparing with the stationary pin arrays since that the oscillating-move stroke of the platform moving up and down was much longer than the height of the pin array;while the overall heat transfer was declined slightly since that the move stroke of the platform moving left and right was somewhat longer than the width of the pin array.Besides,the shorter distance between the jet nozzle and the pin array was desired for the higher overall heat transfer performance.

Back