von Karman Institute Lecture Series and Events

AEROENGINE DESIGN: FROM STATE OF THE ART OF TURBOFANS TOWARDS INNOVATIVE ARCHITECTURES

April 9-12, 2013

Rhode-St-Genèse, Belgium

The first lectures will focus on the preliminary design of state of the art turbofan engine for the propulsion of civil aircrafts. Issues like thermodynamic cycle, mission analysis, and off design operation (operating line) will be addressed. Practical examples will be presented. Once this important phase is completed, the different design teams have the boundary conditions to start the design of each component.

 

This starts with the fan that must cope with a number of constraints in terms of mechanical resistance, noise and surge margin. The aerodynamic design involves both subsonic flow at the hub and supersonic flow at the tip.

The design of the booster (low pressure compressor) will then be addressed where the multistage operation and the matching between successive stages are important concerns. Moving to the high pressure compressor, the lectures will first describe the preliminary design based on througflow calculations. Then, airfoil design, from 2D sections to stage matching optimisation will be addressed. Current trends for future HPC configurations will be outlined.

The design of the combustion chamber involves a number of disciplines such as aerodynamics, fuel atomisation, chemistry of combustion and combustor cooling as well as environmental regulatory issues for emissions (NOx, CO, UHC, soot) along with future combustor technologies. Each of these topics will be reviewed while addressing the design of the combustion chamber.

Concerns related to fuel consumption and environmentally friendliness have pushed the engine manufacturer community to look into innovative architectures. An overview of advanced concepts related to fuel burn reduction will be addressed to improve thermal efficiency and propulsive efficiency, among which open rotor engines, boundary layer ingestion configurations, intercooled engines, non-Brayton cycles …

The high-pressure turbine has the particularity to be submitted to high levels of centrifugal force and exposure to very hot burned gases. The design process, involving successively 1D, 2D and 3D analysis is targeting the highest stage efficiency while accommodating for the cooling of the blades.

Finally, the low-pressure turbine design must satisfy high efficiency together with low weight, cost and noise. This is defined primarily by the load and flow coefficients and the number of airfoils. New lightweight/lowcost configurations tend to reduce the number of blades thanks to high lift designs that take advantage of the positive effects of the unsteady row interaction on the airfoil boundary layer behaviour.

The Lecture Series directors are Dr. R. Dénos, DG Research, 'Aeronautics' and Prof. G. Paniagua, Turbomachinery and Propulsion Department, von Karman Institute.

Preliminary Schedule

Tuesday 9 April 2013

• 08:45 Registration
• 09:15 Welcome Address
• 09:30 Preliminary Design
  J. Kurzke, MTU Aero Engines, Germany
• 10:45 Coffee Break
• 11:15 Preliminary Design (Continued)
  J. Kurzke
• 12:30 Lunch Break
• 14:00 Fan Design
  N. Smith, Rolls-Royce Plc, United Kingdom
  
• 15:15 Coffee Break
• 15:45 Booster Design
  N. Smith, Rolls-Royce Plc, United Kingdom
• 17:00 Reception

Wednesday 10 April 2013

• 09:00 HP Compressor: Preliminary Design
  T. Obrecht, Snecma, France
• 10:15 Coffee Break
• 11:00 HP Compressor Aerodynamics
  O. Domercq, Snecma, France
• 12:00 Lunch Break
• 14:00 Combustion Chamber
  T. Doerr, Rolls-Royce Deutschland, Germany
• 15:15 Coffee Break
• 15:45 Combustion Chamber (Continued)
  T. Doerr

Thursday 11 April 2013

• 9:00 Innovative Architecture I
  N. Tantot, Snecma, France
• 10:15 Coffee Break
• 10:45 Innovative Architecture II
  N. Tantot, Snecma, France
• 12:30 Lunch Break
• 14:00 Lab tour

Friday 12 April 2013

• 9:00 HP Turbine
  F. Haselbach, Rolls-Royce Plc, United Kingdom
• 10:15 Coffee Break
• 10:45 HP Turbine (Continued)
  F. Haselbach
• 12:30 Lunch Break
• 14:00 LP Turbine
  R. Vazquez, ITP, Spain
• 15:15 Coffee Break
• 15:45 LP Turbine
  R. Vazquez
• 17:00 End of Lecture Series

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