A cooling system that applies double collision jet is studied. To create a jet, a square edge type nozzle is used as its shape. The impinging jet that composes a cooling system which applies double impinging jet is created in the single nozzle and double nozzle that correspond to each LED where the cooling zone exists. The distance between the 2nd nozzle and LED with heat sink is where the LED package is established. The main variation and the standard is examined for four different cases through the way out diameter of 1st nozzle. The examined velocity distribution and temperature distribution about the cooling system consisted of single and double nozzle. It was found that an individual LED consisting of double nozzle was efficient.

Abstract
 1. 서론
 2. 해석모델
  2.1 해석모델
  2.2 Nozzle 형상
 3. 수치해석
  3.1 수치해석모델
  3.2 격자구성
 4. 결과 및 고찰
 5. 결론
 참고문헌

• 김동균(동명대학교 기계공학과) | Kim, Dong-Kyun