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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 ===== | ||
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^ 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: | ||
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^ 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> | + | |
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | </ | ||
+ | </ | ||
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- Dernière modification : 2023/04/05 08:59
- (modification externe)