Abstract
Recent studies on improving the efficiency of gas turbine engines have focused on increasing the inlet temperature of gas flowing into the turbine. For the high inlet temperature, it requires the development of a super-alloy based material that can withstand harsh operating conditions. However, it is essential to utilize alternative solutions such as turbine blade cooling technology. Unfortunately, lightweight, high performance, and high mechanical reliable heat exchangers for aircraft have not yet been examined because of the difficulties associated with design optimization and reliability verification under high temperatures and pressures. The purpose of this study is to develop a manufacturing process for a heat exchanger that can be used in aircraft gas turbine engines. The manufacturing process involved preparing fine tubes through multi-step drawing and annealing processes, and joining these to a tube sheet through brazing. In this work, we reported on the total fabrication processes and mechanical integrity tests of a cooled cooling air (CCA) heat exchanger for the aircraft turbine engine. Through the work, a prototype model of a heat exchanger based on a gas turbine assembly was then developed using each of the individual processes. An X-ray CT test and an endoscopy test were performed to inspect the heat exchanger. The results indicated good manufacturing integrity; thus, the developed heat exchanger can be used for cooling turbine blades
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References
McDonald, C. F., “Gas Turbine Recuperator Technology Advancements,” Proc. of International Gas Turbine and Fluids Engineering Conference and Products Show, Paper No. 72-GT-32, 1972.
Lee, C. Y., Kim, D. H., and An, Y. H., “Development Trend of Gas Turbine Cooling Technology in Turbine Blade and Vane,” Proc. of the KFMA Annual Meeting, pp. 60–62, 2013.
Kim, S. H., Park, J. S., Jung, E. Y., Lee, Y. J., and Cho, H. H., “Effect of Cooling Systems to Overall System Performance in Gas Turbine Blade,” Proc. of the Korean Society of Mechanical Engineers, pp. 26–27, 2014.
Joe, J.-R., Jeong, W.-J., Song, S.-H., Park, J.-S., Jeong, H.-S., et al., “Dynamic Analysis on Flow-Induced Vibration in Heat Exchanger Tube Bundle,” Proc. of the Korean Society of Marine Engineering, pp. 475–477, 2010.
Park, J. Y., Jeong, H. S., Han, J. Y., Kim, M. W., Kang, D. W., et al., “Research of Brazing Shape for Brazed Plate Heat Exchanger,” Proc. of KSPE Conference, pp. 687–688, 2009.
Jeong, H.-S., Ha, M.-Y., and Cho, J.-R., “Theoretical and FEAnalysis for Inconel 625 Fine Tube Bending to Predict Springback,” Int. J. Precis. Eng. Manuf., Vol. 13, No. 12, pp. 2143–2148, 2012.
Jeong, H.-S., Cho, J.-R., Jeon, J.-W., and Park, S.-H., “Investigation into Structural Reliability of a Brazed Part in Cross-Corrugated Plates,” Int. J. Precis. Eng. Manuf., Vol. 15, No. 2, pp. 251–258, 2014.
Yun, Y.-H., Kim, H.-J., Kim, C.-S., and Cho, S.-M., “Development and Strength Evaluation of Ring Projection Welding Process of the Microminiature Tube and Tubesheet,” Journal of Welding and Joining, Vol. 27, No. 2, pp. 63–68, 2009.
Kang, S. H., Park, S. H., Son, C. M., Ha, M. Y., Min, J. K., et al., “Analysis of Two Way Fluid Structure Interaction and Local Material Properties of Brazed Joints for Estimation of Mechanical Integrity,” Transactions of the Korean Society of Mechanical Engineers. A, Vol. 37, No. 1, pp. 9–16, 2013.
Smith, W. F., “Structure and Properties of Engineering Alloys,” McGraw-Hill, pp. 494–498, 1993.
Kang, C. Y., Kim, D. U., Kim, S. H., and Woo, I. S., “Brazing Technology of Aircraft and Aerospace Equipments,” Journal of Korea Welding and Joining Society, Vol. 17, No. 2, pp. 1–8, 1999.
Special Metals, INCONEL alloy 625-Special Metals, http://www. specialmetals.com/assets/documents/alloys/inconel/inconel-alloy-625.pdf (Accessed 12 JUL 2016)
Lee, Y.-W. and Kim, J.-H., “Influence of Brazing Temperature on Strength and Structure of SUS304 Stainless Steel Brazed System with BNI-2 Filler Metal: Fundamental Study on Brazeability with Ni-based Filler Metal (II),” Korean Journal of Materials Research, Vol. 17, No. 3, pp. 179–183, 2007.
Jiang, W., Gong, J., and Tu, S., “Effect of Brazing Temperature on Tensile Strength and Microstructure for a Stainless Steel Plate-Fin Structure,” Materials & Design, Vol. 32, No. 2, pp. 736–742, 2011.
Chen, W.-S. and Shiue, R.-K., “Brazing Inconel 625 using Two Ni/(Fe)-based Amorphous Filler Foils,” Metallurgical and Materials Transactions A, Vol. 43, No. 7, pp. 2177–2182, 2012.
Moaveni, S., “Finite Element Analysis: Theory and Application with ANSYS,” Pearson Prentice Hall, 4th Ed., Chap. 6, 2014.
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Kim, CS., Kim, HJ., Cho, JR. et al. Manufacturing and mechanical evaluation of cooled cooling air (CCA) heat exchanger for aero engine. Int. J. Precis. Eng. Manuf. 17, 1195–1200 (2016). https://doi.org/10.1007/s12541-016-0143-4
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DOI: https://doi.org/10.1007/s12541-016-0143-4