von Karman Institute Lecture Series and Events

Engine Intake Aerothermal Design: subsonic to high speed applications

(RTO-AVT-VKI)

From November 14 to 16, 2011

von Karman Institute, Rhode-St-Genèse, Belgium

Aircraft engine intakes are critical components that ensure the proper performance of the engine compression unit. Intake efficiency must be guaranteed over a wide range of operation to ensure the required thrust of the propulsion system. The objective of this lecture series is to provide clear guidelines regarding the design of the intake and integration into the engine and airframe for subsonic and supersonic applications. The course will start with a general lecture covering the intake requirements for the engine. Then FOD in intakes and a case study of Ice accretion of high bypass ratio turbofan engine will be presented. An important issue to be discussed is thermal analysis on the intakes. Modern and green engine architectures must cope with high thermal loads in the lubrication system, on going development programs propose to cool down the oil circuit within the engine intake. The experience acquired in the frame of the DARPA funded project will be presented. The subsonic part of the intake study will be concluded with the study of noise generation and related issues.

The second part of the course will be dedicated to the particular physics related to supersonic and hypersonic applications. The first lecture will present guidelines on the design of high speed intakes. A specific lecture reviews the experience on materials and thermo-mechanical loads on sharp leading edges. Intakes for high-speed flight are subject to shock waves whose subsequent interaction with laminar or turbulent boundary layers is critical to the overall performance. The flow physics of shock-wave/
boundary-layer interactions will be reviewed with an emphasis on unsteady flow phenomena, using examples from recent experiments and direct and large-eddy simulations. Further insight on the thermal loads on intakes will be presented based on ground testing facilities experience. Fundamentals of supersonic intake starting, systematic overview and gasdynamic interpretation of intake starting techniques will be analyzed. Detailed experimental and numerical modeling of the intake physics and starting process will be demonstrated.

This short course is a unique opportunity to bring together experts from different horizons and raise fruitful discussions. The notes will provide a good basis for engineers working both in propulsion and high speed aerodynamics. The director of this Lecture Series is Prof. Guillermo Paniagua from the von Karman Institute.

Monday 14 November 2011

• 08:45    Registration
• 09:15    Welcome, introductory remarks
• 09:30    Intake requirements
  A. El-Sayed, Zagazig University, Egypt
• 11:15    FOD in intakes and a case study of Ice accretion in the intake of high bypass ratio
  A. El-Sayed
• 14:00    Aerothermal Design of an Engine/Vehicle Thermal Management System
  M. Wolff, WPAFB, USA
• 15:45    Noise generation
  E. Envia, NASA, USA
• 17:00    Reception

Tuesday 15 November 2011

• 09:00    Noise issues
  E. Envia, NASA, USA
• 11:15    Design and evaluation of high speed intakes
  T. Cain, GDL, UK
• 14:00    Material tailored thermomechanical design
  H. Boehrk, DLR, Germany
• 15:45    Shock-wave/boundary layer interactions
  N. Sandham, University of Southampton, UK

Wednesday 16 November 2011

• 09:00    High speed intakes thermal research
  P. Gruhn, DLR, Germany
• 10:45    Theoretical and numerical analysis of inlet starting
  S. Molder, Mc Gill, Canada
• 14:00    Design for starting
  S. Molder
• 15:45    Experimental and numerical research on hypersonic inlet starting processes
  R.R. Boyce, Queensland University, Australia
• 17:00    End of Lecture Series

Lunch will be taken from 12h30 to 14h00. Coffee breaks are scheduled each morning and afternoon.

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Location : von Karman Institute for Fluid Dynamics, Rhode-St-Genèse, Belgium