대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제30권12호
  • /
  • Pages.1147-1154
  • /
  • 2006
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

원형가이드 설치에 따른 충돌제트/유출냉각에서 열/물질전달 특성

Heat/Mass Transfer for Impingement/Effusion Cooling System with Circular Guide

  • 홍성국 (연세대학교 대학원 기계공학과) ;
  • 조형희 (연세대학교 기계공학과)
  • 발행 : 2006.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

An experimental investigation was conducted to enhance the heat/mass transfer for impingement/effusion cooling system when the initial crossflow was formed. For the improvement of heat transfer, the circular guide is installed on the injection hole. At the fixed jet Reynolds number of 10,000, the measurements were carried out for blowing ratios ranging from 0.5 to 1.5. The local heat/mass transfer coefficients on the effusion plate are measured using a naphthalene sublimation method. The result presents that the circular guide protects the injected jet from the initial crossflow, increasing the heat/mass transfer. The heat transfer of stagnation region is hardly changed regardless of the blowing ratio. The secondary peak is obviously formed by flow transition to turbulent flow. At high blowing ratio of 1.5, the circular guide produces $26{\sim}30%$ augmentation on the averaged heat/mass transfer while the case without circular guide leads to the low and non-uniform heat/mass transfer. With the increased heat/mass transfer, the installation of circular guide is accompanied by the increase of pressure loss in the channel. However, the pressure drop caused by the circular guide is lower than that for other cooling technique with the circular pin fin.

키워드

참고문헌

  1. Hollwarth, B. R. and Dagan, L., 1980, 'Arrays ？of Impinging Jets with Spent Fluid Removal Though Vent Holes on the Target Surface Part 1: Average Heat Transfer,' J. of Engineering for Power, Vol. 102, pp. 994-999 https://doi.org/10.1115/1.3230372
  2. Hollwarth, B. R., Lehmann, G. and Rosiczkowski, J., 1983, 'Arrays of Impinging Jets with Spent Fluid Removal Through Vent Holes on the Target Surface Part 2: Local Heat Transfer,' J. of Engineering for Power, Vol. 105, pp. 393-402 https://doi.org/10.1115/1.3227428
  3. Cho, H. H. and Goldstein, R. J., 1996, 'Effect of Hole Arrangements on Impingement/Effusion Cooling,' Proceeding of the 3rd KSME-JSME Thermal Engineering Conference, pp. 71-76
  4. Cho, H. H. and Rhee, D. H., 2001, 'Local Heat/Mass Transfer Measurement on the Effusion Plate in Impingement/Effusion Cooling System,' J. of Turbomachinery, Vol. 123, pp. 601-608 https://doi.org/10.1115/1.1344904
  5. Cho, H. H., Choi, J. H. and Rhee, D. H., 2001, 'The Effects of Hole Arrangements on Heat/Mass Transfer of Impingement/Effusion Cooling System,' Proceedings of ExHFT-5, pp. 975-980
  6. Yoon, P. H., Rhee, D. H. and Cho, H. H., 2001, 'Flow and Heat/Mass Transfer Characteristics of Arrays of Impingement Jets with Effusion Holes,' Trans. of the KSME(B), Vol. 25, No. 11, pp. 1606-1615
  7. Metzger, D. E. and Korstad, R. J., 1992, 'Effects of Cross flow in Impingement Heat Transfer,' J. of Engineering for Power, Vol. 94, pp. 35-41
  8. Florschuetz, L. W., Metzger, D. E. and Su, C. C., 1984, 'Heat Transfer Characteristics for Jet Array Impingement With Initial Crossflow,' J. of Heat Transfer, Vol. 106, pp. 34-41 https://doi.org/10.1115/1.3246656
  9. Haiping, C., Wanbing, C. and Taiping, H., 1999, '3-D Numerical Simulation of Impinging Jet Cooling with Initial Crossflow,' ASME Paper No. 99-GT-256
  10. Yoon, P. H., Rhee, D. H. and Cho, H. H., 2000, 'Effect of Arrays of Impinging Jet with Crossflow on Heat/Mass Transfer,' Trans. of the KSME(B), Vol. 24, No. 2, pp. 195-203
  11. Rhee, D. H., Choi, J. H. and Cho, H. H., 2002, 'Flow and Heat (Mass) Transfer Characteristics in an Impingement/Effusion Cooling System with Crossflow,' J. of Turbomachinery, Vol. 125, pp. 74-82 https://doi.org/10.1115/1.1519835
  12. Rhee, D. H., Nam, Y. W. and Cho, H. H., 'Heat/Mass Transfer Characteristics on Ribroughened Surface for Impingement/Effusion Cooling System with Initial Cross flow, ' Trans. of the KSME(B), Vol. 28, No. 3, pp. 338-348 https://doi.org/10.3795/KSME-B.2004.28.3.338
  13. Hong, S. K., Rhee, D. H. and Cho, H. H., 2005, 'Heat/Mass Transfer on Effusion Plate with Circular Pin Fins for Impingement/Effusion Cooling System with Intial Crossflow,' Trans. of the KSME(B), Vol. 29, No. 7, pp. 828-836 https://doi.org/10.3795/KSME-B.2005.29.7.828
  14. Cho, H. H. and Goldstein, R. J., 1995, 'Heat (Mass) Transfer and Film Cooling Effectiveness with Injection Through Discrete Holes Part I: Within Holes and on the Back Surface,' J. of Turbomachinery, Vol. 117, pp. 440-450 https://doi.org/10.1115/1.2835680
  15. Goldstein, R. J. and Cho, H. H., 1995, 'A Review of Mass Transfer Measurement Using Naphthalene Sublimation,' Experimental Thermal and Fluid Science, Vol. 10, pp. 416-434 https://doi.org/10.1016/0894-1777(94)00071-F
  16. Eckert, E. R. G., 1976, 'Analogies to Heat Transfer Processes,' in Measurements in Heat Transfer, ed. Eckert, E. R. G. and Goldstein, R. J., pp. 397-423, Hemisphere Pub., New York
  17. Kline, S. J. and McClinetock, F., 1953, 'Describing Uncertainty in Single Sample Experiments,' Mechanical Engineering, Vol. 75, pp. 3-8
  18. Goldstein, R. J., Cho, H. H. and Jabbari, M. Y., 1997, 'Effect of Plenum Crossflow on Heat (Mass) Transfer Near and Within the Entrance of Film Cooling Holes,' J. of Turbomachinery, Vol. 119, pp. 761-769 https://doi.org/10.1115/1.2841186
  19. Lytle, D. and Webb, B. W., 1994, 'Air Jet Impingement Heat Transfer at Nozzle-plate Spacing,' Int. J. Heat Mass Transfer, Vol. 37, No. 12, pp. 1687-1697 https://doi.org/10.1016/0017-9310(94)90059-0