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8 results for “ONERA”
H2020 ENODISE: ONERA Numerical Aeroacoustic Database Configuration A2-Ducted
<p>This database contains the numerical results obtained by ONERA on the configuration A2-ducted of the H2020 ENODISE project. In this configuration, a ducted propeller is placed above an S-plate to ingest an adverse pressure gradient boundary layer in a partially buried configuration. The present results can be compared to the measurements carried out by the University of Bristol.</p> <p>All following parameters are kept constant in the present simulations:</p> <ul> <li>Free-stream velocity <em>u_inf</em> = 32 m/s,</li> <li>Propeller tip clearance <em>d/D</em> = 0.002,</li> <li>Propeller position inside the duct <em>x/D</em> = -0.0627.</li> </ul> <p>Five simulations have been realized by varying the installation (with or without the S-plate) and the propeller rotation speed:</p> <ul> <li>Isolated propeller (without the S-plate), <em>N</em> = 6000 rpm, 8000 rpm, 11000 rpm,</li> <li>Installed propeller (with the S-plate), <em>N</em> = 6000 rpm, 8000 rpm.</li> </ul> <p>The predictions were obtained using the ProLB solver which is based on the Lattice Boltzmann method (<a href="http://www.prolb-cfd.com/">http://www.prolb-cfd.com/</a>). Aerodynamic and acoustic results are provided for each simulation. One-dimensional results are saved into ASCII column files (<em>.dat</em> extension) while geometry and raw flow extractions are saved into HDF5 CGNS files (<em>.cgns</em> extension). <em>README.txt</em> files are included for detailed description of the data.</p> <p> </p>
H2020 ENODISE: ONERA Numerical Aeroacoustic Database of Configuration C
<p>This database contains the acoustic prediction results realized by ONERA of the configuration C investigated in the framework of the European project ENODISE. In this configuration, contra-rotating propellers are investigated in static condition with and without shroud. The results presented here can be compared to the measurements carried out by von Karman Institute for Fluid Dynamics in anechoic facility ALCOVES (https://zenodo.org/record/7966211).</p> <p>The investigated operating point as calculated in the prediction is:</p> <ul> <li>Shrouded, RPM=6000, d=3cm.</li> <li>Unshrouded, RPM=6000, d=3cm.</li> </ul> <p>Predictions were obtained using the ProLB code based on a Lattice Botlzmann Method.</p> <p>Description of the database is proposed in the document <em>Database_ENODISE_ONERA_ConfigurationC.pdf.</em></p>
ONERA silver TEEY measurements
<p>This document shows three TEEY measurements made in the spatial environment department (DESP) of ONERA Toulouse. It has been measure by Mohamed Belhaj and Thomas Gineste on both clean and technical silver samples in 2014. </p>
H2020 ENODISE: ONERA Auralizations Configuration B2
<p>A quick evaluation of the SISW numerical data (<a href="https://zenodo.org/record/8176756">https://zenodo.org/record/8176756) </a>and the ECL experimental data (<a href="https://zenodo.org/record/7925336">https://zenodo.org/record/7925336</a>) was done on an auditory level through auralisations. The in-house auralisation tool FLAURA was used. Sound signatures were evaluated at the microphone positions 17 and 22 (at 90° to the propeller plane) for single and double propeller configurations, with and without flow.</p> <p>The database is composed of .wav files, presenting the measured temporal data (ECL) either compared to auralised measured spectral data (ECL) or simulated data (SISW).</p> <p>A description of the data is included in a pdf file.</p>
ONERA Numerical Database Configuration A1 (static propeller)
<p>This database contains the numerical results obtained by ONERA on the configuration A1, using ZDES mode 2 and ZDES mode 3 methods. The ZDES mode 3 approach offers an explicit resolution of the turbulent scales present in the outer region of the flat plate boundary layer and their interaction with the propeller.</p>
ONERA copper TEEY measurements with various surface state and incidence angle
<p>These files are Total Electron Emission Yield (TEEY) measurements of two copper samples with various surface treatments. Energies range from 10 eV to 1 keV and incidence angle from 0° to 60°.</p> <p>Measurements were performed at the ONERA (Toulouse, France) in a Ultra-High Vacuum facility (3*10<sup>9</sup> millibar).</p>
H2020 ENODISE: ONERA Numerical Aeroacoustic Database Configuration B1
<p>The ONERA numerical database on configuration B1 deals with the scattering effects of 3 side-by-side puller propellers installed upstream a wing profile in a flow, using an in-house 3-steps-chaining-method. The aim of this work has been to evaluate the ability of the method to predict the scattering effects on the sound pressure level and its directivity.</p> <p><br> The two operating points that have been studied are:<br> • U∞ = 30 m/s, J = 0.8, AoA = 2°, with a blade phase-angle Φ=0° between the middle and the side propellers<br> • U∞ = 30 m/s, J = 0.8, AoA = 2°, with a blade phase-angle Φ=10° between the middle and the side propellers</p> <p>The present configuration follows the one described in TUD experimental contribution for configuration B1.</p> <p>A synthetized description of the numerical method including some important details and results will be included in the file ONERA_B1_configuration.pptx.</p> <p>The ONERA database contains numerical results about aerodynamic performances (thrust, torque and efficiency). It also includes pressure and sound pressure levels on the arcs microphones positions of TUD experimental configuration.<br> Data are stored in .dat and .plt format files.</p>
BELHAJ (ONERA), TEEY measurements on technical copper sample using DEESSE
<p>.csv file with TEEY measurements on technical copper sample with the experimental instrument DEESSE of ONERA, Toulouse. </p> <p>Incident electron energy from 5ev to 1000eV. </p>
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