Abstract
A broad range of numerical flow simulations are carried out during the design phase of a highly bent intake geometry. The main aim is to evaluate the aerodynamic characteristics of a projected wind tunnel model and an estimation of mechanical loads for the structural dimensioning. The numerical setup using the TRACE code is validated first against comprehensive experimental data of a NASA s-duct test case. Three different turbulence models are found to be capable of reproducing the main flow features that occur in bent intake ducts with an acceptable accuracy. The following steady simulations of the symmetric wind tunnel model show asymmetric flow solutions and convergence problems for two of the three turbulence models. URANS computations are therefore carried out including a sensitivity study towards time-step size and domain volume. The unsteady results using the three different turbulence models still exhibit significant deviations concerning mechanical loads and duct performance. A safety margin is thus estimated from the unsteady data to be used for the construction and testing of the wind tunnel model.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Rademakers, R.P.M., Kächele, T., Niehuis, R.: Integration of a highly bent engine inlet in an engine test facility. In: Proceedings of ISROMAC Symposium of Rotating Machinery, Honolulu, USA, ISROMAC2016-112 (2016)
Bindl, S., Muth, B., Niehuis, R.: Adaption of a ground test facility to operate a modern turbo jet engine. In: Proceedings of the 21st International Symposium on Air Breathing Engines, Busan, Korea, ISABE-2013-1307 (2013)
Wellborn, S.R., Okiishi, T.H.: A study of the compressible flow through a diffusing S-duct. NASA Technical Memorandum 106411 (1993)
Society of Automotive Engineers: Gas turbine engine inlet flow distortion guidelines. Aerospace Recommended Practice 1420, Rev. B (2002)
Society of Automotive Engineers: Inlet total pressure considerations for gas turbine engines. Aerospace Information Report 1419, Rev. B (2013)
Nürnberger, D.: Implizite Zeitintegration für die Simulation von Turbomaschinenströmungen. Dissertation, DLR Forschungsbericht 2004-27 (2004)
Kügeler, E.: Numerisches Verfahren zur genauen Analyse der Kühleffektivität filmgekühlter Turbinenschaufeln. Dissertation, DLR Forschungsbericht 2005-11 (2005)
Brear, M.J., Warfield, Z., Magnus, J.F.: Flow separation within the engine inlet of an uninhabited combat air vehicle. In: Proceedings of FEDSM’03, 4th ASME Joint Fluids Engineering Conference, Honululu USA (2003)
Gerolymos, G.A., Joly, S., Mallet, M., Vallet, I.: RSM-RANS flow prediction in aircraft engine intake double-S-shaped duct. J. Aircr. 47, 1368–1381 (2010)
Delot, A.L., Scharnhorst, R.K.: A comparison of several CFD Codes with experimental data in a diffusing S-duct. In: Proceedings of 49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, AIAA Paper 2013-3796 (2013)
Kozulovic, D., Röber, T.: Modelling the streamline curvature effects in turbomachinery flows. In: Proceedings of ASME Turbo Expo 2006: Power for Land, Sea and Air, Barcelona, Spain, GT2006-90265 (2006)
Menter, F.R., Kuntz, M., Langtry, R.: Ten Years of Industrial Experience with the SST Turbulence Model. Begell (2003)
Hellsten, A.K.: New advanced k-w turbulence model for high-lift aerodynamics. AIAA J. 43(9), 1857–1869 (2005)
Kächele, T., Niehuis, R., Schneider, T.: Study on efficient full annulus URANS computations of an intake compressor configuration. In: Proceedings of 30th Congress of the International Council of the Aeronautical Sciences, Daejeon, Korea, ICAS2016-0548 (2016)
Acknowledgements
These simulations were carried out within the frame of the COORETEC-Turbo 2020 project no. 1.2.4a. “Stabilität des Verdichtungssystems bei Off-Design Zuströmbedingungen”. This AG Turbo project is funded by the German Ministry of Economy and Technology (BMWi) and conducted in cooperation with MTU Aero Engines AG.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer International Publishing AG
About this paper
Cite this paper
Kächele, T., Schneider, T., Niehuis, R. (2018). Steady and Unsteady Numerical Simulation of a Bent Intake Geometry. In: Dillmann, A., et al. New Results in Numerical and Experimental Fluid Mechanics XI. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 136. Springer, Cham. https://doi.org/10.1007/978-3-319-64519-3_2
Download citation
DOI: https://doi.org/10.1007/978-3-319-64519-3_2
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-64518-6
Online ISBN: 978-3-319-64519-3
eBook Packages: EngineeringEngineering (R0)