Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
| public:modeles:rotor_03:accueil [2023/03/01 11:58] – [About] solenekojtych | public:modeles:rotor_03:accueil [2024/08/05 15:43] (Version actuelle) – ancienne révision (2024/08/05 15:42) restaurée rafaelbarraud | ||
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| Ligne 42: | Ligne 42: | ||
| <callout type=" | <callout type=" | ||
| * [[https:// | * [[https:// | ||
| - | * {{ : | + | * {{ : |
| * {{ : | * {{ : | ||
| </ | </ | ||
| Ligne 59: | Ligne 59: | ||
| ==== Aerodynamic design | ==== Aerodynamic design | ||
| - | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
| ^ pressure ratio | [-] | 1.801 | | ^ pressure ratio | [-] | 1.801 | | ||
| ^ mass flow | ^ mass flow | ||
| Ligne 65: | Ligne 65: | ||
| ^ tip solidity | ^ tip solidity | ||
| ^ aspect ratio | [-] | 2.53 | | ^ aspect ratio | [-] | 2.53 | | ||
| - | ^ rotative | + | ^ nominal rotation |
| ==== Material properties | ==== Material properties | ||
| - | The material of rotor 3 is defined in the original NASA report. A 200-grade maraging steel is considered: | + | Rotor 3 is made of a 200-grade maraging steel, but the exact material properties are not provided in the NASA report. The following properties are considered : |
| - | ^ | + | ^ |
| ^ alloy | [-] | 18-Ni-200-maraging | ^ alloy | [-] | 18-Ni-200-maraging | ||
| ^ Young' | ^ Young' | ||
| Ligne 103: | Ligne 103: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 |<fc # | + | | 1 |
| - | | 2 |<fc # | + | | 2 |
| - | | 3 |<fc # | + | | 3 |
| + | ====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 123: | Ligne 131: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 |<fc # | + | | 1 |1B | 1728.06 |
| - | | 2 |<fc # | + | | 2 |2B | 6559.27 |
| - | | 3 |<fc # | + | | 3 |1T | 8243.04 |
| Ligne 131: | Ligne 139: | ||
| ^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| - | | 1 |<fc # | + | | 1 |
| - | | 2 |<fc # | + | | 2 |
| - | | 3 |<fc # | + | | 3 |
| + | 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 205: | Ligne 223: | ||
| ^ solidité en tête | ^ solidité en tête | ||
| ^ allongement | ^ allongement | ||
| - | ^ vitesse de rotation | + | ^ vitesse de rotation |
| ==== Propriétés matériau | ==== Propriétés matériau | ||
| - | Le matériau | + | Le matériau du rotor 3 est un alliage à base de nickel : un acier maraging de grade 200, mais ses caractéristiques ne sont pas fournies. Les propriétés considérées sont : |
| ^ | ^ | ||
| Ligne 243: | Ligne 261: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 |<fc # | + | | 1 |1F | 1722,54 | 274, |
| - | | 2 |<fc # | + | | 2 |2F |
| - | | 3 |<fc # | + | | 3 |1T | 8224,31 | 1308, |
| + | ====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 259: | Ligne 287: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 |<fc # | + | | 1 |1F | 1728,06 | 275,04 | |
| - | | 2 |<fc # | + | | 2 |2F | 6559,27 | 1043, |
| - | | 3 |<fc # | + | | 3 |1T | 8243,04 | 1311, |
| Ligne 267: | Ligne 295: | ||
| ^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| - | | 1 |<fc # | + | | 1 |1F | 1728,11 | 275,03 | |
| - | | 2 |<fc # | + | | 2 |2F |
| - | | 3 |<fc # | + | | 3 |1T | 8245,30 | 1312, |
| </ | </ | ||
| + | ====Diagramme de Campbell==== | ||
| + | Comparaison de l' | ||
| + | |||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | aube initiale (orange), aube de référence (grise)</ | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| + | |||
| </ | </ | ||