Overview
EASIER addressed the CfP JTI_CS_2013-2-GRA-05-008 and proposed a way to perform acoustic tests on a WT-model which was designed and manufactured in a previous CfP.
The project was proposed by a small consortium combining the necessary competence for this project:
- IBK is a small company coordinating the project and performing design work in the project. IBK is also leading the consortium building the WT in the previous project ESICAPIA.
- REVOIND is a small Italian company specialised in manufacturing complex parts. Revoind's main task in this project is to manufacture the model.
- University of Rome, Prof. Camussi, brings acoustic knowledge into the consortium, which is needed for preparing the acoustic tests and post-processing of the acoustic tests.
The project consisted of three technical work-packages plus one management work-package. The three technical WPs tackle planning and realisation of possible design-changes, dynamic characterisation and experimental tests (including post-processing). A crucial point for the quality of the results was the choice of the wind-tunnel. Possible wind-tunnels in Europe had been reviewed by the consortium and the two possible solutions for this model (DNW and RUAG) had been asked for quotes. Although the previous model was built for an aerodynamical measurement campaign in one of these tunnels in general a test in either of them is feasible. There are pros and cons for each solution, finalising the choice for the WT was therefore the first questions that had to be tackled together with the TM.
Funding
Results
Executive Summary:
In EASIER noise-characterisation of low-noise technologies developed within the frame of the GRA-ITD in Cleansky 1 was performed. In order to do this a Wind-Tunnel model, which was developed in the frame of the Cleansky-project ESICAPIA, was used. Within EASIER the partners University of Rome 3, REVOIND Industriale and IBK were implemented. REVOIND Industriale was later replaced by EUROTECH.
In order to perform the test-activities specific requirements for the tests and the WT-model needed to be defined. Due to the fact that the model is large (span of 4.9m) all activities needed to be planned with care including logistics onsite in the WT. The WT was chosen to be the RUAG Large-Wind Tunnel in Emmen.
In order to optimize and de-risk activities the design and manufacturing of the ESICAPIA model was done in strong link with the EASIER project thus taking into account acoustic requirements, like
- Different configuration in the WT (dorsal vs. ventral), model needs to be rotated
- Landing-gear bay to be realized in a way that is representative of real acoustics were taken into account upfront and did not lead to a design solution that would impact either test.
Within EASIER the test-setup was defined and tested in the WT in an isolated environment. A setup including sideline microphones, a beamforming array and specific locations to position the array was defined and validated during the pre-tests. As model during the pre-test a microphone was used, thus allowing generating a defined noise and making sure that the post-procession actually works. The pre-test was successfully performed, important lessons learned for the main test were obtained.
After model availability the tests were performed in the RUAG-Wind-Tunnel using a test-matrix defined together with the Topic Manager. The Wind-Tunnel tests were performed as planned, allowing a characterization of the noise acting on the wing and analyzing the effect of low-noise technologies developed within the GRA ITD.