From engine integration to cabin noise: drivers to accurate interior noise evaluations
The present paper addresses the topic of of end-to-end cabin noise aero-vibro-acoustic prediction for civil aircraft. Through an overview of Airbus cabin noise prediction means and related investigations, the sensitivity of cabin noise to key parameters at engine and aircraft levels is demonstrated, highlighting the need for high fidelity numerical and experimental capabilities as well as integrated ways of working between engine and aircraft manufactureres in the frame of engine design to cabin noise.
A projection and condensation method for aerospace noise and vibration engineering
A condensation method based on the U-vectors from Singular Value Decomposition is applied on aeroacoustics and structural dynamics data. The aim of the condensation is to make the process of cabin noise levels estimates and noise control design more efficient. The suggested method is allowing a reduction of the number of load cases used for vibro-acoustic analyses, and hence significantly reduces the time and efforts for vibration predictions and subsequent cabin noise estimates. Application of the method is made to aeroacoustic predictions for a Counter Rotating Open Rotor propulsion system, and for structural response data for an aircraft test section available at AIRBUS GmbH, Hamburg, Germany.
First Insights into the Draft Genome Sequence of the Endophyte Paenibacillus amylolyticus Strain GM1FR, Isolated from Festuca rubra L.
ABSTRACT Paenibacillus amylolyticus strain GM1FR is an endophyte isolated from aerial plant tissues of Festuca rubra L. Here, we report the draft genome sequence (7.3 Mb) of GM1FR containing 6,241 protein-coding genes, some of which are potentially involved in plant growth promotion and biocontrol.