WP Leader: Office National d’Etudes et de Recherches Aerospatiales (ONERA)
This Work Package is dedicated on complying with a future sonic boom international regulation, prediction capabilities with high level of accuracy will be requested from source near-field air flow to ground far-field pressure signature. Contrarily to subsonic acoustic certification procedures, for which ground noise measurements can be retro-propagated linearly back to the Aircraft source and then propagated numerically in reference conditions, sonic boom inherent nonlinearities, strong atmosphere effects and long propagation distances, does not enable such approach for supersonic. Therefore, in complement to measurement, sonic boom numerical tools will play a key role in the future supersonic certification process.
The top level technological objectives of WP2 are:
- To validate the numerical methods for sonic boom prediction in order to accurately characterize the sonic boom source (near-field signature) and predict the sonic boom effects on ground using experimental data (wind tunnel near-field measurements and flight tests data from WP5) and code-to-code verification;
- To validate wind tunnel techniques for high accuracy near-field signature measurement in cruise conditions;
- To develop and validate models for indoor sonic boom prediction accounting for building response;
- To design the aerodynamic shape of a low boom demonstrator in link with WP6 requirements and generate aerodynamic data needed in WP6 for the preliminary design of a low boom demonstrator;
- To provide recommendations on sonic boom prediction process complying with certification procedures.
To that end, the Work Package structure is as follows:
- Task 2.1: Validation of Numerical Sonic Boom Prediction Capabilities
- Subtask 2.1.1: Validation of Near field modeling
- Subtask 2.1.2: Validation of Far field modeling
- Subtask 2.1.3: Structural transmission modeling
- Task 2.2: Experimental prediction capabilities
- Subtask 2.2.1: Low boom demonstrator design
- Subtask 2.2.2: Low boom concept WT test
- Task 2.3: Synthesis and Recommendations
