ERICA 소재부품융합 첨단제조장비 혁신인재 교육연구단

2023학년 1학기 다섯번째 정기세미나를 다음과 같이 개최하오니, 연구단 참여 대학원생 및 교수님들의 많은 참여를 부탁드립니다.

이번 강연에는 기계공학과 윤준용 교수님의 초청으로 GE Global Research Christopher Yoon 박사님을 모시고 세미나를 개최합니다.

--------------------------------------------------------- 정기 세미나 ---------------------------------------------------------- 

1. Title: EVALUATION OF ADJOINT OPTIMIZED HOLE - PART II: PARAMETER EFFECTS ON PERFORMANCE

2. Speaker: Christopher Yoon 박사(GE Global Research)

3. Date & Time: May. 2 ( Tues.) 2023. 09:00 AM 

4. Place: 컨퍼런스홀 101호

5. 발표 내용

In a previous study from our laboratory, a computational adjoint based optimization method was used to design shaped film

cooling holes fed by internal co-flow and cross-flow channels. The associated RANS computations predicted that the holes optimized

for use with cross-flow (X-AOpt) and co-flow (Co-AOpt) would increase adiabatic effectiveness significantly compared to a baseline

7-7-7 shaped hole. Experimental validations of these performance predictions are presented in companion paper (Gutierrez et al., 2022). 

Although the experimental values were significantly lower than the computational predictions, the adiabatic effectiveness for the adjoint 

optimized holes was measured to be noticeably higher than that for the baseline 7-7-7 shaped hole. Specifically, the X-AOpt hole was 

75% higher and the Co-AOpt hole was 30% higher in terms of peak performance when P/D effects were accounted for. In this study, 

the effects of various key parameters on the performance of the adjoint optimized holes were determined. For these experiments the internal 

channel velocity ratios ranged from VRc = 0.2 to 0.4, both co-flow and counter-flow conditions were used, and the density ratio ranged from

 DR = 1.2 to 1.8. These provided a quantification of the performance of the adjoint optimized holes over a wide range of operating conditions

encompassing engine relevant conditions. Adiabatic film effectiveness measurements and thermal field measurements are made to understand 

the performance variations and to compare with 7-7-7 SI (sharp inlet).

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많은 참석 부탁드립니다.

감사합니다.