1Mid-term meeting, 7-8 April 2011, VKI
VALidation and Improvement of Airframe Noise prediction Tools(ACP8-GA-2009-233680)
WP 4 – Improvements of Numerical CAA Approaches
Task 4.1 – Improvements of source modelling
Compiled by: M.Shur, M.Strelets (NTS)
2Mid-term meeting, 7-8 April 2011, VKI
• Task 4.1 objectives
• Partners involved and allocated efforts
• Main directions of work (according to DoW)
• Overview of partners’ contributions
OUTLINEOUTLINE
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Task ObjectivesTask Objectives
• General WP-4 objective: Development of improved simulation approaches and enhanced algorithms for AFN prediction
Within envisioned avenues of improvements identified in VALIANT DoW
Based on the weak points of the state-of-the-art tools discovered by Partners in the course of WP3
• In particular, Task 4.1 deals with improvements in the area of
Turbulent Noise Source ModellingTurbulent Noise Source Modelling
• These include both: Approaches to turbulence simulation (Sub-Task 4.1.1) Higher order schemes (Sub-Task 4.1.2)
4Mid-term meeting, 7-8 April 2011, VKI
Partners and Allocated EffortsPartners and Allocated Efforts
Partner1
VKI2
IMM4
TUB5
ONERA8
DLR9
CIMNE10
NTS11
NUM
P-M (total DoW) 7.0 11.5 10.0 5.5 9.0 7.5 9.0 2.0
P-M (18 months, DoW)
4.5 7.5 5.5 2.0 4.5 4.0 2.0 ?
P-M (18 months, fact)
? ? ? ? ? ? 8.0 ?
Contribution
• All “numerical teams”, except for LMS (8 Partners), are involved
• Green – ProvidedGreen – Provided• Red – Not provided Red – Not provided
• Deliverables: D21 – Intermediate report (month 21 – May 2011) D31 – Final report (month 30 – February 2012)
5Mid-term meeting, 7-8 April 2011, VKI
Main Directions of Partners’ Work (DoW)Main Directions of Partners’ Work (DoW)• VKIVKI
Extension of steady higher order space discretization Residual Distribution Schemes developed by VKI earlier on time-dependent computations on unstructured grids, to cope with CAA problems
• IMMIMM Enhancement of in-house codes by implementation of:
- Kinetically consistent formulations of turbulence-resolving approaches (better representation of near-wall turbulence)- Higher-order approximations on unstructured grids
• TUBTUB Improvement of hybrid RANS-LES approaches implemented in in-house code
- “DDES-type” methods – reducing inaccuracies associated with the so-called “grey area” (may be important for gap turbulence interaction test case)- “WMLES-type methods” – removing minor “log-layer mismatch” predicted by the IDDES within the code
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Main Directions of Work - 2Main Directions of Work - 2• ONERAONERA
Development of improved methods of creating turbulent fluctuations at the upstream boundary of LES domain within 2-stage RANS-NLDE approach (important for wing-flap test case)
- Techniques will be based on Synthetic Eddy Method of Jarrin et al.: expected to produce more realistic turbulence since it allows to reproduce both 1st- and 2nd-order moments
• NTSNTS Work on same issue, in the framework of Embedded IDDES
- Enhancement of earlier developed turbulence-recycling procedure- Development of new efficient generator of “synthetic turbulence” at RANS-LES interface (more flexible and user-friendly than recycling)
• DLRDLR Extending of stochastic approach to noise generation to the case of mean flows supporting self-sustained large-scale oscillations (important for slat-wing and gap turbulence test cases)
7Mid-term meeting, 7-8 April 2011, VKI
Main Directions of Work – 3 Main Directions of Work – 3 • CIMNECIMNE
Extension of SGS-modelling developed by CIMNE earlier for stabilization of the FE formulations to simulation of turbulence
• NUMECANUMECA Validation of promising techniques of acceleration of LES-based computations on broadband noise prediction problems Extension of capabilities of LEE solver for acoustic propagation based on high order Discontinuous Galerkin formulation
8Mid-term meeting, 7-8 April 2011, VKI
OVERVIEWOVERVIEW
of Partners Contributionsof Partners Contributions
• VKIVKI• IMMIMM• TUBTUB• ONERAONERA
• DLRDLR• CIMNECIMNE• NTSNTS• NUMECANUMECA
9Mid-term meeting, 7-8 April 2011, VKI
Summary of VKI Contribution (1/2)
“Title if applicable”, authors
10Mid-term meeting, 7-8 April 2011, VKI
Summary of VKI Contribution (2/2)
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Summary of IMM Contribution (1/2)
“Title if applicable”, authors
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Summary of IMM Contribution (2/2)
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Summary of TUB Contribution (1/2)
“Title if applicable”, authors
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Summary of TUB Contribution (2/2)
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Summary of ONERA Contribution (1/2)
“Title if applicable”, authors
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Summary of ONERA Contribution (2/2)
17Mid-term meeting, 7-8 April 2011, VKI
Summary of DLR Contribution (1/2)
“Title if applicable”, authors
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Summary of DLR Contribution (2/2)
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Summary of CIMNE Contribution (1/2)
“Title if applicable”, authors
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Summary of CIMNE Contribution (2/2)
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Summary of NTS Contribution (1/2)
“Title if applicable”, authors
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Summary of NTS Contribution (2/2)
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Summary of NUMECA Contribution (1/2)
“Title if applicable”, authors
24Mid-term meeting, 7-8 April 2011, VKI
Summary of NUMECA Contribution (2/2)
25Mid-term meeting, 7-8 April 2011, VKI
Concluding RemarksConcluding Remarks
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