Influence of cooling air mass flux variation on the convective heat transfer coefficient of HPT rotor disk

• Autorzy: Domański R. , Jedliński K.
• Języki publikacji: EN

Abstrakty

EN

The paper is focused on the convective heat transfer phenomena on the High Pressure Turbine (HPT) rotor disk wall. The disk is a part of PW6000 turbojet engine (designed by Pratt & Whitney Company) and is a base of the 1st stage of HPT blades having very high temperature (combustion gases leaving combustion chamber have temperature around 1800 K). The analyzed disk is cooled by the air taken from one of the compressor's stages. The air gets to the gap between HPT disk and mini disk through discrete pump holes and then divides into two streams. One of them is used to decrease temperature of turbine blades and the second one is directed to the sequent turbine stages. Numerical analysis (made in Fluent) is based on the two dimensional aerodynamic model (in steady state) which is the cross section of the real geometry. There are three different sets of boundary conditions analyzed. Each of them has the same flow splits (40% of air is used to cool turbine blades and 60% gets to the next turbine stage) and all settings except cooling air mass flow on the inlet. Convective heat transfer coefficients are calculated using different method then proposed by Fluent (WFHTC and SHTC options give wrong results in this case). Coefficients are presented along disk wall and are compared with Fluent calculation methods.

Słowa kluczowe

EN

CFD; Fluent; High Pressure Turbine; Rotor Disk; convective heat transfer coefficient

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 2
• Strony: 107--114
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Domański R.

autor

Jedliński K.

• Warsaw University of Technology, Division of Thermodynamics Nowowiejska 21/25, 00-665 Warsaw, Poland tel., fax: [phone],

Bibliografia

• [1] Boyce, M. P., The gas turbine engineering handbook, Gulf Publishing Company, 2006.
• [2] Fluent Inc, Documentation, 2004.
• [3] Incropera, F. P., DeWitt, D. P., Fundamentals of Heat and Mass Transfer, Fifth Edition, John Wiley & Sons, Inc., New York, Chichester, Weinheim, Brisbane, Toronto, Singapore 2002.
• [4] Matthews, C., Aeronautical Engineering’s Data Book, Butterworth-Neinemann, 2001.
• [5] Mattingly, J. D., Elements of Gas Propulsion, Open University Pres, 1996.
• [6] Muszyński, M., Orkisz, M., Modelowanie turbinowych silników odrzutowych, Institute of Aviation, Warsaw, 1997.
• [7] Rolls-Royce plc, The jet engine, Great Britain, 1996.