[Effets de la température sur le rayonnement acoustique des jets supersoniques en présence d'injection d'eau]
The effects of temperature both on supersonic jet noise with water injection (used for noise reduction) and on the efficiency of the method are investigated. The location of injection varies from 1.5D to 15D while the other parameters remain fixed to their optimum values. One notices better overall noise level reductions by injecting close to the nozzle exit. Moreover spectral analysis emphasizes that attenuation in high and low frequencies depends on the location of injection. Finally, the jet temperature does not greatly affect the efficiency of this method as the measured attenuation is similar to that encountered with supersonic jets with ambiant temperature.
Cette étude est consacrée à l'application de l'injection d'eau dans les jets supersoniques comme moyen de réduction de bruit. L'efficacité de cette méthode est testée sur deux jets ayant des températures élevées. L'abscisse d'injection varie de 1,5D jusqu'à 15D, les autres paramètres étant fixés à leur valeur optimale. Une bonne réduction du bruit global est mesurée lorsque l'eau est injectée près de la sortie de tuyère. L'analyse spectrale montre des atténuations différentes en hautes et basses fréquences selon l'abscisse d'injection. Finalement, la température ne paraît pas jouer un rôle prédominant dans l'efficacité de la réduction de bruit par injection de masse.
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Mots-clés : acoustique, ondes, vibrations, mécanique des fluides, jets supersoniques, réduction sonore, injection d'eau, effets de la température
Yann Marchesse 1 ; Yves Gervais 1 ; Henri Foulon 2
@article{CRMECA_2002__330_1_1_0, author = {Yann Marchesse and Yves Gervais and Henri Foulon}, title = {Water injection effects on hot supersonic jet noise}, journal = {Comptes Rendus. M\'ecanique}, pages = {1--8}, publisher = {Elsevier}, volume = {330}, number = {1}, year = {2002}, doi = {10.1016/S1631-0721(02)01418-3}, language = {en}, }
Yann Marchesse; Yves Gervais; Henri Foulon. Water injection effects on hot supersonic jet noise. Comptes Rendus. Mécanique, Volume 330 (2002) no. 1, pp. 1-8. doi : 10.1016/S1631-0721(02)01418-3. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(02)01418-3/
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