Sept. 16, 2015

4th AIAA Workshop on Benchmark Problems for Airframe Noise Computations


Sponsored by the Aeroacoustics Technical Committee, the BANC-IV workshop will address the computations of unsteady flow and noise radiation for a select set of airframe noise configurations for which experimental data is already available and, in some cases, additional data is expected to be available in the near future. The BANC-IV Workshop will build upon the prior BANC Workshops in 2010, 2012, and 2014, respectively, to enable a more definitive assessment of the state-of-the-art in the computations and measurements of airframe noise and, in particular, will include a stronger collaborative element from the outset.


Objectives of the BANC-IV workshop are to:

1.     Provide a forum for a thorough assessment of simulation-based noise-prediction tools in the context of airframe configurations including both near-field unsteady flow and the acoustic radiation generated via the interaction of this flow with solid surfaces.

2.     Identify current gaps in physical understanding, experimental databases, and prediction capability for the major sources of airframe noise.

3.     Help determine best practices, and accelerate the development of benchmark quality datasets.

4.     Promote future coordinated studies of common configurations for maximum impact on the current state of the art in the understanding and prediction of airframe noise.


It is envisioned that all eight problem categories from the BANC-II Workshop will continue to be of interest to the airframe noise (AFN) community in the foreseeable future. However, in light of the progress achieved in categories 2 (Unsteady Wake Interference between Tandem Cylinders) and 3 (Rudimentary Landing Gear), the BANC-IV Workshop will focus exclusively on categories 1,4,5,6,7, and 8 from the BANC-II and BANC-III Workshops:

  1. Airfoil trailing edge noise,
  1. Partially-dressed, cavity-closed nose landing gear,
  2. ONERA/Airbus LAGOON Simplified Landing Gear configuration,
  3. Slat Noise (DLR Configuration)
  4. Slat Noise (NASA’s modified 30P30N Configuration), and
  5. Acoustic Propagation Phase of Airframe Noise Prediction


The workshop configurations reflect a compromise based on several criteria, including:

  1. Non-proprietary and of wide interest
  2. More realistic than previous Computational AeroAcoustics (CAA) benchmarks, providing a balance between geometric complexity, relevant physics, computational requirements, and experimental constraints
  3. Experiments conducted in more than one facility, with measurements addressing the full causal chain from unsteady flow structures to far-field acoustics.


The workshop will be held on June 02-03, 2016, immediately following the 22nd AIAA/CEAS Aeroacoustics Conference in Lyon, France. Even though the workshop includes the combined consideration of unsteady flow near airframe components and the resulting acoustic radiation, joint contributions based on complementary capabilities are also encouraged. As noted above, the BANC-IV Workshop also includes a separate category dedicated to the acoustic propagation phase of the airframe noise prediction process. Previously developed problem statements for these categories are available from the respective folders accessible from the URL for the BANC-II Workshop:

Most of these problem statements will be updated for the upcoming BANC-IV Workshop.


Those with an interest in participating in the workshop must submit a Notice of Interest in the BANC-IV workshop by submitting their contact information via the online form at:

This would enable their names to be included in the mailing list for crucial information about the workshop. Workshop related queries should be directed to: Meelan Choudhari (




Problem category leads for the BANC-IV Workshop are listed below. The category titles are also linked to the corresponding folder containing the (previously developed) problem statement and other relevant information for that particular category. Please contact the category leads for the latest information related to a category of interest.

1.     Trailing edge Noise: Michaela Herr (, Christopher Bahr (, and Mohammad Kamruzzaman (

4.     Nose landing gear: Mehdi R. Khorrami ( and Thomas Van de Ven (

5.     ONERA/Airbus LAGOON Landing Gear Configuration: Eric Manoha ( and Bastien Caruelle (

6.     DLR Slat Noise Configuration: Michael Pott-Pollenske, (, Jan Delfs (, and Eric Manoha (

7.     NASA Slat Noise Configuration: Meelan Choudhari (, Mehdi Khorrami ( and David Lockard (

8.     Acoustic Propagation Phase of Airframe Noise Prediction: Leonard Lopes (, Tomoaki Ikeda (, Taro Imamura (, and Stephane Redonnet (