Browse > Article
http://dx.doi.org/10.6108/KSPE.2020.24.5.043

Effect on the Flow and Heat Transfer of Endwall by Installation of Cut Pin in Front of Pin-fin Array of Turbine Blade Cooling Passage  

Choi, Seok Min (Department of Plant Technology Energy Systems Research Division, Korea Institute of Machinery and Materials)
Kim, Su Won (Power Plant Operation Division, POSCO ENERGY)
Park, Hee Seung (School of Mechanical Engineering, Yonsei University)
Kim, Yong Jin (Republic of Korea Navy)
Cho, Hyung Hee (School of Mechanical Engineering, Yonsei University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.24, no.5, 2020 , pp. 43-55 More about this Journal
Abstract
The effect of cutted pin in front of pin-fin array was analyzed for increasing the cooling performance of gas turbine blade. The numerical simulations were conducted to figure out the flow and thermal characteristics. The base case which is staggered pin-fin array, cut pin case 1 which has X2/Dp=1.25 cut pin and cut pin case 2 which has X3/Dp=1.75 cut pin were compared. The results showed that cut pin increases the strength of the horseshoe vortex which occurred at the leading edge of pin-fin array. Furthermore, the wake effect is reduced at the trailing edge of pin-fin array. As a result, the heat transfer distribution on the endwall increases. However, the friction factor increases owing to the installation of cut pin, but the thermal performance factor is increased maximum 23.8% in cut pin case 2. Therefore, installation of cut pin will be helpful for increasing the cooling performance of pin-fin array of gas turbine blade.
Keywords
Gas Turbine; Internal Cooling; Cylinder; Cut Pin; Heat Transfer;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Metzger, D. E., Florschuetz, L. W., Takeuchi, D. I., Behee, R. D., and Berry, R. A., "Heat transfer characteristics for inline and staggered arrays of circular jets with crossflow of spent air" Journal of Heat Transfer, Vol. 101, No. 3, pp. 526-531, 1979.   DOI
2 Florschuetz, L. W., Berry, R. A., and Metzger, D. E., "Periodic streamwise variations of heat transfer coefficients for inline and staggered arrays of circular jets with crossflow of spent air" Journal of Heat Transfer, Vol. 102, No. 1, pp. 132-137, 1980.   DOI
3 Metzger, D. E., Fan, C. S., and Haley, S. W., "Effects of pin shape and array orientation on heat transfer and pressure loss in pin fin arrays" Journal of Engineering and Gas Turbine Power, Vol. 106, No. 1, pp. 252-257, 1984.   DOI
4 Park, J. S., Kim, K. M., Lee, D. H., Cho, H. H., and Chyu, M. K., "Heat transfer on rotating channel with various heights of pin-fin" Turbo Expo: Power for Land, Sea, and Air, Vol. 43147, pp. 727-734, 2008.
5 Metzger, D. E., and Haley, S. W., 1982, "Heat transfer experiments and flow visualization for arrays of short pin fins" Turbo Expo: Power for Land, Sea, and Air, Vol. 79597, p. V004T09A007, 1982.
6 VanFossen, G. J., "Heat-transfer coefficients for staggered arrays of short pin fins" Journal of Engineering and Power, Vol. 104, No. 2, pp. 268-274, 1982.   DOI
7 Simoneau, R. J., and VanFossen, G. J., "Effect of location in an array on heat transfer to a short cylinder in crossflow" Journal of Heat Transfer, Vol. 106, No. 1, pp. 42-48, 1984.   DOI
8 Brigham, B. A., and VanFossen, G. J. "Length to diameter ratio and row number effects in short pin fin heat transfer" Journal of Engineering and Gas Turbine Power, Vol. 106, No. 1, pp. 241-244, 1984.   DOI
9 Hwang, J. J., and Lui, C. C., "Detailed heat transfer characteristic comparison in straight and 90-deg turned trapezoidal ducts with pin-fin arrays" International journal of heat and mass transfer, Vol. 42, No. 21, pp. 4005-4016, 1999.   DOI
10 Hwang, J. J., and Lui, C. C., "Measurement of endwall heat transfer and pressure drop in a pin-fin wedge duct" International Journal of Heat and Mass Transfer, Vol. 45, No. 4, pp. 877-889, 2002.   DOI
11 Lyall, M. E., Thrift, A. A., Thole, K. A., and Kohli, A., "Heat transfer from low aspect ratio pin fins" Journal of Turbomachinery, Vol. 133, No. 1, 2012
12 Ostanek, J. K., and Thole, K. A., "Effects of varying streamwise and spanwise spacing in pin-fin arrays" Turbo Expo: Power for Land, Sea, and Air, Vol. 44700, pp. 45-57, 2012.
13 Kirsch, K. L., Ostanek, J. K., Thole, K. A., and Kaufman, E., "Row Removal Heat Transfer Study for Pin Fin Arrays" Turbo Expo: Power for Land, Sea, and Air, Vol. 45714, p. V05AT12A006, 2014.
14 Kim, M., Ha, M. Y., and Min, J. K., "A numerical study on various pin-fin shaped surface air-oil heat exchangers for an aero gas-turbine engine" International Journal of Heat and Mass Transfer, Vol. 93, pp. 637-652, 2016.   DOI
15 Rao, Y., Xu, Y., and Wan, C, "An experimental and numerical study of flow and heat transfer in channels with pin fin-dimple and pin fin arrays" Experimental Thermal and Fluid Science, Vol. 38, pp. 237-247, 2012.   DOI
16 Chyu, M. K., "Heat transfer and pressure drop for short pin-fin arrays with pin-endwall fillet" Journal of Heat Transfer, Vol. 112, No. 4, pp. 926-932, 1990.   DOI
17 Hwang, J. J., and Lu, C. C., "Lateral-flow effect on endwall heat transfer and pressure drop in a pin-fin trapezoidal duct of various pin shapes" Journal of Turbomachinery, Vol. 123, No. 1, pp. 133-139, 2001.   DOI
18 Lawson, S. A., Thrift, A. A., Thole, K. A., and Kohli, A., "Heat transfer from multiple row arrays of low aspect ratio pin fins" International Journal of Heat and Mass Transfer, Vol. 54, No. 17-18, pp. 4099-4109, 2011.   DOI
19 Jeng, T. M., "Thermal performance of in-line diamond-shaped pin fins in a rectangular duct" International communications in heat and mass transfer, Vol. 33, No. 9, pp. 1139-1146, 2006.   DOI
20 Gupta, S., Chaube, A., and Verma, P., "Review on Heat Transfer Augmentation Techniques: Application in Gas Turbine Blade Internal Cooling" Journal of Engineering Science & Technology Review, Vol. 5, No. 1, 2012.
21 Armstrong, J. E. F. F. R. E. Y., and Winstanley, D. A. V. I. D., "A review of staggered array pin fin heat transfer for turbine cooling applications" Journal of Turbomachinery, Vol. 110, No. 1, pp. 94-103, 1988.   DOI
22 Hwang, J. J., Lai, D. Y., and Tsia, Y. P., "Heat transfer and pressure drop in pin-fin trapezoidal ducts" Journal of Turbumachinery, Vol. 121, No. 2, pp. 264-271, 1999.   DOI
23 Hwang, J. J., and Lu, C. C., "Detailed Heat Transfer Distribution on the Endwall of a Trapezoidal Duct with an In-Line Pin Array" International Journal of Rotating Machinery, Vol.8., No.9, 2002.
24 Kirsch, K. L., and Thole, K. A., "Pressure loss and heat transfer performance for additively and conventionally manufactured pin fin arrays" International Journal of Heat and Mass Transfer, Vol. 108, pp. 2502-2513, 2017.   DOI
25 Metzger, D. E., Berry, R. A., and Bronson, J. P., "Developing heat transfer in rectangular ducts with staggered arrays of short pin fins" Journal of Heat Transfer, Vol. 104, No. 4, pp. 700-706, 1982.   DOI
26 Uzol, O., and Camci, C., "Elliptical Pin Fins as an Alternative to Circular Pin Fins for Gas Turbine Blade Cooling Applications: Part 1-Endwall Heat Transfer and Total Pressure Loss Characteristics" Turbo Expo: Power for Land, Sea, and Air, Vol. 78521, p.V003T01A056, 2001.
27 Siw, S. C., Chyu, M. K., and Alvin, M. A., "Heat transfer enhancement of internal cooling passage with triangular and semi-circular shaped pin-fin arrays" Turbo Expo: Power for Land, Sea, and Air, Vol. 44700, pp. 493-503, 2012.
28 Luo, L., Wang, C., Wang, L., Sunden, B., and Wang, S., "Heat transfer and friction factor performance in a pin fin wedge duct with different dimple arrangements" Numerical Heat Transfer, Part A: Applications, Vol. 69, No. 2, pp. 209-226, 2016.   DOI