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Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
| public:modeles:rotor_11:accueil [2023/03/28 09:52] – solenekojtych | public:modeles:rotor_11:accueil [2024/08/05 15:52] (Version actuelle) – [Natural frequencies] rafaelbarraud | ||
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| annulus area on the performance of axial-flow fan stages. A series of three stage: rotor 11, 16 and 17 were designed with a weight flow per unit annulus area of 198, 178, and 208 kilograms per second per square meter. All three stages were designed to produce a pressure ratio of 1.57, and all had the same meridional flow path geometry. | annulus area on the performance of axial-flow fan stages. A series of three stage: rotor 11, 16 and 17 were designed with a weight flow per unit annulus area of 198, 178, and 208 kilograms per second per square meter. All three stages were designed to produce a pressure ratio of 1.57, and all had the same meridional flow path geometry. | ||
| - | * Original technical report [(cite: | + | * Original technical report [(cite: |
| author | author | ||
| date = {1973}, | date = {1973}, | ||
| Ligne 24: | Ligne 24: | ||
| url = {https:// | url = {https:// | ||
| } | } | ||
| - | |||
| - | |||
| </ | </ | ||
| * Picture : | * Picture : | ||
| Ligne 58: | Ligne 56: | ||
| ^ aspect ratio | [-] | 2.5 | | ^ aspect ratio | [-] | 2.5 | | ||
| ^ number of blades | ^ number of blades | ||
| - | ^ rotative | + | ^ nominal rotation |
| ==== Material properties | ==== Material properties | ||
| - | The original material of the rotor 11 is not defined in the NASA report. | + | The original material of the rotor 11 is not defined in the NASA report. |
| - | + | ||
| - | Considered properties: | + | |
| ^ | ^ | ||
| Ligne 106: | Ligne 102: | ||
| + | ====Campbell diagram==== | ||
| + | Evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed, for the mesh computed with OpenMCAD[(cite: | ||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| ===== Initial blade ===== | ===== Initial blade ===== | ||
| Ligne 121: | Ligne 124: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 | 1B | 1436.14 | + | | 1 | 1B | 1436.14 |
| - | | 2 | 2B | 5253.42 | + | | 2 | 2B | 5253.42 |
| | 3 | 1T | 8274.96 | | 3 | 1T | 8274.96 | ||
| Ligne 129: | Ligne 132: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 | 1B | 1436.16 | + | | 1 | 1B | 1436.16 |
| - | | 2 | 2B | 5255.37 | + | | 2 | 2B | 5255.37 |
| | 3 | 1T | 8277.22 | | 3 | 1T | 8277.22 | ||
| + | ====Campbell diagram==== | ||
| + | Comparison of the evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed for the initial and the reference blade: | ||
| + | |||
| + | {{ : | ||
| + | |||
| + | |||
| + | < | ||
| + | |||
| + | initial blade (orange), reference blade (gray) </ | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| Ligne 146: | Ligne 161: | ||
| ===== À propos ===== | ===== À propos ===== | ||
| - | + | Le rotor 16 fait partie d'un programme de recherche visant à étudier l' | |
| - | Le rotor 11 fait partie d'un programme de recherche visant à étudier l' | + | |
| * Rapport technique original [(cite: | * Rapport technique original [(cite: | ||
| Ligne 189: | Ligne 203: | ||
| ^ allongement | ^ allongement | ||
| ^ nombre d' | ^ nombre d' | ||
| - | ^ vitesse de rotation | + | ^ vitesse de rotation |
| ==== Propriétés matériau | ==== Propriétés matériau | ||
| - | Le matériau original du rotor 11 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 11 n'est pas défini dans le rapport de la NASA. |
| - | + | ||
| - | Propriétés considérées : | + | |
| ^ | ^ | ||
| Ligne 230: | Ligne 242: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | 1F | 1435, | + | | 1 | 1F | 1435, |
| - | | 2 | 2F | 5252, | + | | 2 | 2F | 5252, |
| | 3 | 1T | 8270, | | 3 | 1T | 8270, | ||
| + | ====Diagramme de Campbell==== | ||
| + | Évolution des fréquences propres des 3 premiers modes, en fonction de la vitesse de rotation, pour le maillage obtenu avec OpenMCAD[(cite: | ||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| + | |||
| + | |||
| + | |||
| ===== Aube initiale ===== | ===== Aube initiale ===== | ||
| Ligne 246: | Ligne 268: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | 1F | 1436, | + | | 1 | 1F | 1436, |
| - | | 2 | 2F | 5253, | + | | 2 | 2F | 5253, |
| | 3 | 1T | 8274, | | 3 | 1T | 8274, | ||
| Ligne 254: | Ligne 276: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 | 1F | 1436, | + | | 1 | 1F | 1436, |
| - | | 2 | 2F | 5255, | + | | 2 | 2F | 5255, |
| | 3 | 1T | 8277, | | 3 | 1T | 8277, | ||
| + | ====Diagramme de Campbell==== | ||
| + | Comparaison de l' | ||
| + | {{ : | ||
| + | < | ||
| - | </tabs> | + | aube initiale (orange), aube de référence (grise)</caption> |
| - | </pane> | + | |
| + | * {{ : | ||
| + | * {{ : | ||
| + | |||
| + | </ | ||
| + | </ | ||