Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_12:accueil [2023/03/19 22:09] – ikrambeghdadi | public:modeles:rotor_12:accueil [2024/08/05 15:54] (Version actuelle) – [Natural frequencies] rafaelbarraud | ||
---|---|---|---|
Ligne 14: | Ligne 14: | ||
Rotor 12 is part of a research program to study the effects of blade row solidity on efficiency and stall margin of an axial-flow compressor rotor. It is one of a series of rotors designed to further study the effects of solidity : rotor 8 with a tip solidity of 1.5, rotor 12 with a tip solidity of 1.7 and rotor 14 with a tip solidity of 1.3. Tip solidity are being changed by varying the number of blades while maintaining the same velocity diagrams and flow path. These stages were designed such that the tip solidity of both the rotor and stator blades are the same. | Rotor 12 is part of a research program to study the effects of blade row solidity on efficiency and stall margin of an axial-flow compressor rotor. It is one of a series of rotors designed to further study the effects of solidity : rotor 8 with a tip solidity of 1.5, rotor 12 with a tip solidity of 1.7 and rotor 14 with a tip solidity of 1.3. Tip solidity are being changed by varying the number of blades while maintaining the same velocity diagrams and flow path. These stages were designed such that the tip solidity of both the rotor and stator blades are the same. | ||
- | * Original technical report [(cite: | + | * Original technical report [(cite: |
author | author | ||
date = {1972}, | date = {1972}, | ||
Ligne 31: | Ligne 31: | ||
* [[https:// | * [[https:// | ||
* {{ : | * {{ : | ||
- | * {{ : | + | * {{ : |
</ | </ | ||
Ligne 53: | Ligne 53: | ||
^ aspect ratio | [-] | 2.4 | | ^ aspect ratio | [-] | 2.4 | | ||
^ number of blades | ^ number of blades | ||
- | ^ rotative | + | ^ nominal rotation |
==== Material properties | ==== Material properties | ||
- | The original | + | The material of rotor 12 is not defined in the original |
- | + | ||
- | Considered properties: | + | |
^ | ^ | ||
Ligne 95: | Ligne 93: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 1655.46 | + | | 1 | 1B | 1655.46 |
- | | 2 | 2B | 5955.84 | + | | 2 | 2B | 5955.84 |
| 3 | 1T | 8466.78 | | 3 | 1T | 8466.78 | ||
+ | ====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: | ||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
Ligne 117: | Ligne 122: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| 1 | 1B | 1654.05 | | 1 | 1B | 1654.05 | ||
- | | 2 | 2B | 5951.13 | + | | 2 | 2B | 5951.13 |
| 3 | 1T | 8470.80 | | 3 | 1T | 8470.80 | ||
Ligne 126: | Ligne 131: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
| 1 | 1B | 1654.12 | | 1 | 1B | 1654.12 | ||
- | | 2 | 2B | 5953.62 | + | | 2 | 2B | 5953.62 |
| 3 | 1T | 8473.76 | | 3 | 1T | 8473.76 | ||
+ | ====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 144: | Ligne 160: | ||
Le rotor 12 fait partie d'un programme de recherche visant à étudier les effets de la solidité des rangées d' | Le rotor 12 fait partie d'un programme de recherche visant à étudier les effets de la solidité des rangées d' | ||
- | * Rapport technique original [(cite: | + | * Rapport technique original [(cite: |
author | author | ||
date = {1972}, | date = {1972}, | ||
Ligne 162: | Ligne 178: | ||
* [[https:// | * [[https:// | ||
* {{ : | * {{ : | ||
- | * {{ : | + | * {{ : |
</ | </ | ||
Ligne 184: | Ligne 200: | ||
^ allongement | ^ allongement | ||
^ nombre d' | ^ nombre d' | ||
- | ^ vitesse de rotation | + | ^ vitesse de rotation |
==== Propriétés matériau | ==== Propriétés matériau | ||
- | Le matériau original du rotor 12 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 12 n'est pas défini dans le rapport de la NASA. Un acier maraging de grade 200 est considéré: |
- | + | ||
- | Propriétés considérées : un acier maraging de grade 200 : | + | |
^ | ^ | ||
Ligne 226: | Ligne 240: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1655, | + | | 1 | 1F | 1655, |
- | | 2 | 2F | 5955, | + | | 2 | 2F | 5955, |
| 3 | 1T | 8466, | | 3 | 1T | 8466, | ||
+ | ====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 243: | Ligne 267: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
| 1 | 1F | 1654, | | 1 | 1F | 1654, | ||
- | | 2 | 2F | 5951, | + | | 2 | 2F | 5951, |
| 3 | 1T | 8470, | | 3 | 1T | 8470, | ||
Ligne 250: | Ligne 274: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1654, | + | | 1 | 1F | 1654, |
- | | 2 | 2F | 5953, | + | | 2 | 2F | 5953, |
| 3 | 1T | 8473, | | 3 | 1T | 8473, | ||
+ | ====Diagramme de Campbell==== | ||
+ | Comparaison de l' | ||
+ | {{ : | ||
+ | < | ||
- | </tabs> | + | aube initiale (orange), aube de référence (grise)</caption> |
- | </pane> | + | |
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | </ | ||
+ | </ | ||