Development and validation of parabolized stability equations and resolvent framework in an unstructured environment to tackle industrial jet-pylon-wing installation noise

The prediction and control of aircraft propulsion-system noise remain important challenges for the development of quieter and more environmentally sustainable aircraft. In particular, the accurate modeling of jet noise in realistic installed configurations requires accounting for the interaction between the jet, its coherent hydrodynamic structures and nearby aerodynamic surfaces, such as pylons and wings (Birch et al., 2005, Meloni et al., 2021, Daviller et al.,2024).

A preceding project demonstrated the potential of advanced numerical and physical modeling approaches for improving the understanding and prediction of propulsion-system noise. However, the prediction of direct jet noise and its reflection beneath the wing is not yet sufficiently robust and accurate for industrial application. More precisely, approaches based on the diffraction of coherent jet structures showed the ability to capture installation-related geometrical effects, but the associated three-dimensional source-modeling methodology is still missing.

The SALSA project aims to address these limitations by developing and validating improved modeling strategies for propulsion-system noise. In the proposed position, one objective is to demonstrate the applicability of advanced stability-based approaches to complex geometries. These approaches include Parabolized Stability Equations (PSE) for the approximate modeling of coherent jet structures and three-dimensional resolvent analysis for the identification and characterization of acoustically relevant flow structures.

The proposed postdoctoral research will be dedicated specifically to the development, validation and application of these methods. The objective is to establish reliable and computationally efficient tools capable of analyzing jet-instability mechanisms and their acoustic relevance in configurations beyond the canonical axisymmetric jet (Amaral et al., 2024), including configurations representative of jet- pylon and jet-wing interactions.