http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Kirttayoth Yeranee (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Effects of expansion pipe length on heat transfer enhancement of impinging jet array
Kirttayoth Yeranee,Makatar Wae-hayee,Ibroheng Piya,Yu Rao,Chayut Nuntadusit 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.5
We experimentally and numerically investigated the effect of expansion pipe length on heat transfer enhancement and flow characteristics of impinging jet array with mounting expansion pipe. The inner diameter (d) and the length of each main pipe nozzle was d = 17.2 mm and 200 mm, respectively. Nozzle arrangement was distributed in 5 rows × 5 columns with an in-line configuration. The jet-to-wall distance (H) was fixed at H/d = 8, while the jet-to-jet spacing (S) was varied at S/d = 6 and 8. The expansion pipe length (L) was varied at L/d = 4, 6 and 8, and the inner diameter of the expansion pipe (D) was fixed at D/d = 4. Reynolds number of the jets was kept constant at 30000. The conventional impinging jets were also performed to compare with the case of jets with mounting expansion pipe. The 3-D numerical simulation with v 2 -f turbulence model was applied to simulate the flow characteristics. Results showed that the surrounding air was induced into the expansion pipe, and an entrainment of induced air became greater when expansion pipe was longer. This influenced more markedly on enhancement of Nusselt number at stagnation point for narrow jet-to-jet spacing (S/d = 6).
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
