Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_54:accueil [2023/04/06 15:14] – [Modifier - Pane] solenekojtych | public:modeles:rotor_54:accueil [2024/07/30 12:01] (Version actuelle) – [Natural frequencies] rafaelbarraud | ||
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Rotor 54 is part of a research program to study fan stages suitable for use in engines for quiet powered lift aircraft. Experimental studies have been conducted on fan stages suitable for use in engines for quiet powered lift aircraft using the externally blown flap. The externally blown flap aircraft requires a large flow of low velocity air for effective lift and low noise during take-off and landing. To meet the low noise requirement, | Rotor 54 is part of a research program to study fan stages suitable for use in engines for quiet powered lift aircraft. Experimental studies have been conducted on fan stages suitable for use in engines for quiet powered lift aircraft using the externally blown flap. The externally blown flap aircraft requires a large flow of low velocity air for effective lift and low noise during take-off and landing. To meet the low noise requirement, | ||
- | * Original technical report [(cite: | + | * Original technical report [(cite: |
author | author | ||
- | | + | |
institution | institution | ||
title = {Aerodynamic performance of a 1.20-pressure-ratio fan stage designed for low noise}, | title = {Aerodynamic performance of a 1.20-pressure-ratio fan stage designed for low noise}, | ||
Ligne 40: | Ligne 40: | ||
* [[https:// | * [[https:// | ||
* {{ : | * {{ : | ||
- | * {{ : | + | * {{ : |
</ | </ | ||
Ligne 62: | Ligne 62: | ||
^ aspect ratio | [-] | 3.9 | | ^ aspect ratio | [-] | 3.9 | | ||
^ number of blades | ^ number of blades | ||
- | ^ rotative | + | ^ nominal rotation |
==== Material properties | ==== Material properties | ||
- | he original material of the rotor 54 is not defined in the NASA report. | + | he original material of the rotor 54 is not defined in the NASA report. |
- | + | ||
- | Considered properties: | + | |
^ | ^ | ||
Ligne 105: | Ligne 103: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 1018.5 | 183.317 | | + | | 1 | 1B | 1018.50 | 183.32 | |
- | | 2 | 1T | 3542.5 | 663.656 | | + | | 2 | 1T | 3542.50 | 663.66 | |
- | | 3 | 2B | 6094.7 | 1055.71 | + | | 3 | 2B | 6094.70 | 1055.71 |
+ | ====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 125: | Ligne 131: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 1019.1 | 183.027 | | + | | 1 | 1B | 1019.10 | 183.03 | |
- | | 2 | 1T | 3539.3 | 665.313 | | + | | 2 | 1T | 3539.30 | 665.31 | |
- | | 3 | 2B | 6074.0 | 1052.6 | + | | 3 | 2B | 6074.00 | 1052.60 | |
Ligne 133: | Ligne 139: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 1019.1 | 183.029 | | + | | 1 | 1B | 1019.10 | 183.03 | |
- | | 2 | 1T | 3540.8 | 665.406 | | + | | 2 | 1T | 3540.80 | 665.41 | |
- | | 3 | 2B | 6075.8 | 1052.81 | + | | 3 | 2B | 6075.80 | 1052.81 |
+ | |||
+ | |||
+ | ====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 152: | Ligne 172: | ||
Le rotor 54 fait partie d'un programme de recherche visant à étudier les étages de soufflante susceptibles d' | Le rotor 54 fait partie d'un programme de recherche visant à étudier les étages de soufflante susceptibles d' | ||
- | * Rapport technique original [(cite: | + | * Rapport technique original [(cite: |
author | author | ||
- | | + | |
institution | institution | ||
title = {Aerodynamic performance of a 1.20-pressure-ratio fan stage designed for low noise}, | title = {Aerodynamic performance of a 1.20-pressure-ratio fan stage designed for low noise}, | ||
Ligne 166: | Ligne 186: | ||
< | < | ||
- | < | + | * < |
author | author | ||
title = {Stage 54 rotor. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | title = {Stage 54 rotor. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
Ligne 176: | Ligne 196: | ||
* [[https:// | * [[https:// | ||
* {{ : | * {{ : | ||
- | * {{ : | + | * {{ : |
</ | </ | ||
Ligne 198: | Ligne 218: | ||
^ allongement | ^ allongement | ||
^ nombre d' | ^ nombre d' | ||
- | ^ vitesse de rotation | + | ^ vitesse de rotation |
==== Propriétés matériau | ==== Propriétés matériau | ||
Ligne 240: | Ligne 260: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1018,5 | 183,317 | | + | | 1 | 1F | 1018,50 | 183,32 | |
- | | 2 | 1T | 3542,5 | 663,656 | | + | | 2 | 1T | 3542,50 | 663,66 | |
- | | 3 | 2F | 6094,7 | 1055, | + | | 3 | 2F | 6094,70 | 1055, |
+ | |||
+ | ====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 255: | Ligne 286: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1019,1 | 183,027 | | + | | 1 | 1F | 1019,10 |
- | | 2 | 1T | 3539,3 | 665,313 | | + | | 2 | 1T | 3539,30 | 665,31 | |
- | | 3 | 2F | 6074,0 | 1052,6 | | + | | 3 | 2F | 6074,00 | 1052,60 | |
Ligne 263: | Ligne 294: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1019,1 | 183,029 | | + | | 1 | 1F | 1019,10 | 183,03 | |
- | | 2 | 1T | 3540,8 | 665,406 | | + | | 2 | 1T | 3540,80 | 665,41 | |
- | | 3 | 2F | 6075,8 | 1052, | + | | 3 | 2F | 6075,80 | 1052, |
+ | |||
+ | |||
+ | |||
+ | ====Diagramme de Campbell==== | ||
+ | Comparaison de l' | ||
+ | {{ : | ||
+ | < | ||
+ | aube initiale (orange), aube de référence (grise)</ | ||
+ | * {{ : | ||
+ | * {{ : | ||
</ | </ | ||
</ | </ |
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- Dernière modification : 2023/04/06 15:14
- de solenekojtych