SIMULATION OF TWO DIMENSIONAL FLOW AND CONJUGATE HEAT TRANSFER PROBLEM IN COOLED GAS TURBINE NOZZLE GUIDE VANE
Main Article Content
Abstract
The coupled treatment (conjugate numerical methodology) allows the simultaneous solution of the external flow (steady, two dimensional, compressible and turbulent flow) and conduction within the metal (steady, two dimensional) of gas turbine nozzle guide vane (with and without internal convection cooling). Validation of the developed conjugate capability is investigated in the present work.
The numerical results were compared with experimental results for steady, two dimensional, compressible and turbulent flow through the gas turbine nozzle cooling guide vane type (NASA-C3X), and the results were found to be in good agreement with experiments by )Hylton 1983).
The study shows that the (conjugate numerical methodology) gives good and more accurate results than the un-coupled treatment. It also shows that the cooling of the vane reduced the thermal stresses which are focused in the trailing edge of the vane for being thin. Moreover, the cooling flow inside the passages of the vane reduced the temperature of vane body and that gives longer life to the vane for the same Turbine Inlet Temperature (TIT) and efficiency. Otherwise, it gives higher Turbine Inlet Temperature and high efficiency if one chose to keep same life of the vane.
Finally, the present study shows that the conjugate heat transfer simulation is a good tool in gas turbine design, and it serves as base future work with more complex geometries and cooling schemes for turbine blade.
Article Details
Section
How to Cite
References
Canelli, C., Sacchetti, M., and Traverso, S., 2003, "Numerical 3-D conjugate flow and heat transfer investigation of a convection-cooled gas turbine vane", ATI-NASA , CFD Engineering S.r.l.Genova 16129, Italy [email protected], Ansaldo Energia S.p.A. Genova 16152, Italy [email protected] .
Hylton, Milhec, Turner, Nealy and York, (1983), “Analytical and Experimental Evaluation of the Heat Transfer Distribution Over the Surfaces of Turbine Vanes”, NASA CR 168015.
Jones W. P., and Launder B. E., (1972), ―The prediction of the laminarization with a two-equation model of turbulence‖, Int. J. heat transfer, Vol. 15, pp 301-314.
Launder, B. E. and Spalding, D. B., (1974), ―The Numerical Computation of Turbulent Flows Comp‖, Math. App. Mech. Eng., Vol. 3, pp 269-289.
Qingluan Xue, 2005, "Development of conjugate heat transfer capability to an unstructured flow solver - U2NCLE", MSc. Thesis, Computational Engineering in the College of Engineering, Mississippi State University.
Rhie, C. M., and Chow, W. I., (1983), ―Numerical study of the turbulent flow past an airfoil with trailing edge separation‖, AIAA J., Vol. 21, pp 1525-1532.
Versteeg, H. K., and Malalasekera, W., (1995), ―An introduction to computational fluid dynamics-The finite volume method‖, Longman group Ltd.
Wang, Y., and Komori S., (1998), ―Simulation of the subsonic flow in a high-speed centrifugal compressor impeller by the pressure-based method‖, Proc. Inst. Mech. Eng., part A, Vol. 212, pp 269-287.