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Theories and Numerical code for prediction of near and far field noise generated by new generation propellers and Open Rotor blades

PROJECTS
Funding
European
European Union
Duration
-
Status
Complete
Geo-spatial type
Other
Total project cost
€100 000
EU Contribution
€75 000
Project Acronym
CAA-NLH
STRIA Roadmaps
Vehicle design and manufacturing (VDM)
Transport mode
Airborne icon
Transport policies
Societal/Economic issues,
Environmental/Emissions aspects
Transport sectors
Passenger transport,
Freight transport

Overview

Call for proposal
SP1-JTI-CS-2009-01
Link to CORDIS
Objectives

The inherently high propulsive efficiency of advanced propellers and Counter-Rotating Open Rotors (CROR) have a great potential for fuel savings, but the level of noise emitted by the open blades represent a major obstacle to their environmental acceptance. Consequently, the design of a low noise, fuel efficient open rotor powerplant is one of the major objectives of the CleanSky JTI. Within the virtual prototype design environment, the availability of highly efficient calculation procedures of noise sources and their propagation are essential to achieve these objectives. While the CAA approach for the acoustic far-field noise propagation is well established, the critical issue remains the delivery of fast and accurate unsteady CFD-solutions for prediction of the noise sources.

The present CAA-NLH proposal responds to this objective, through an advanced new approach for the CFD determination of the noise sources. The CAA-NLH project will rely on the nonlinear harmonic method (NLH) which allows a gain in CPU performance for CROR’s compared to current CFD sliding grid or Chimera methodologies, of two to three orders of magnitude. This method, defined in the frequency domain, has been largely validated and successfully applied on multistage turbines and compressors at many companies. Its extension to propeller and CROR configurations has recently been initiated.

The present project proposes the further extension of this approach, including a dedicated post-processing of the pressure fluctuations to determine the near-field tone noise, and an integration of the proposer’s FW-H module with the NLH code for reliable far-field noise predictions, including automatic CFD/FW-H coupling (with automatic CFD grid generation), optimized generation of permeable surfaces and experimental validation, with a turnaround time for a complete simulation of a few hours on a low number of processors. A professional, user friendly and quality assured software environment will be pursued.

Funding

Parent Programmes
Institution Type
Public institution
Institution Name
European Commission
Type of funding
Public (EU)
Specific funding programme
JTI-CS - Joint Technology Initiatives - Clean Sky
Other Programme
JTI-CS-2009-1-GRA-05-002 Theories and Numerical code for prediction of near and far field noise generated by new generation propellers and Open Rotors blade

Partners

Lead Organisation
Organisation
Numerical Mechanics Applications International Sa
Address
CHAUSSEE DE LA HULPE 187-189, 1170 BRUXELLES, Belgium
Organisation website
EU Contribution
€75 000
Partner Organisations
EU Contribution
€0

Technologies

Technology Theme
Noise testing, modelling and reduction
Technology
Aircraft noise measurements
Development phase
Validation
Technology Theme
Aircraft propulsion
Technology
Counter Rotating Open Rotor Engine
Development phase
Validation

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