Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_68:accueil [2023/04/06 15:58] – solenekojtych | public:modeles:rotor_68:accueil [2024/08/01 16:42] (Version actuelle) – [Natural frequencies] rafaelbarraud | ||
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Ligne 16: | Ligne 16: | ||
* Original technical report [(cite: | * Original technical report [(cite: | ||
author | author | ||
- | | + | |
institution | institution | ||
title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | ||
Ligne 45: | Ligne 45: | ||
==== Aerodynamic design | ==== Aerodynamic design | ||
- | ^ ^ | + | ^ ^ |
^ pressure ratio | [-] | 1.54 | | ^ pressure ratio | [-] | 1.54 | | ||
^ mass flow | ^ mass flow | ||
Ligne 52: | Ligne 52: | ||
^ aspect ratio | [-] | 1.89 | | ^ aspect ratio | [-] | 1.89 | | ||
^ number of blades | ^ number of blades | ||
- | ^ rotative | + | ^ nominal rotation |
==== Material properties | ==== Material properties | ||
- | The original material of the rotor 68 is not defined in the NASA report. | + | The original material of the rotor 68 is not defined in the NASA report. |
- | Considered properties: Ti-6Al-4V, generic titanium : | + | ^ |
- | + | ||
- | ^ | + | |
^ alloy | [-] | Ti-6Al-4V | ^ alloy | [-] | Ti-6Al-4V | ||
^ Young' | ^ Young' | ||
Ligne 94: | Ligne 92: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 2492.51 | + | | 1 | 1B | 2492.51 |
- | | 2 | 2B | 7697.97 | + | | 2 | 2B | 7697.97 |
- | | 3 | 1T | 10374.29 | + | | 3 | 1T | 10374.29 |
+ | ====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 114: | Ligne 120: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 2450.71 | + | | 1 | 1B | 2450.71 |
| 2 | 2B | 7608.18 | | 2 | 2B | 7608.18 | ||
| 3 | 1T | 10308.76 | | 3 | 1T | 10308.76 | ||
Ligne 122: | Ligne 128: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | 1B | 2450.84 | + | | 1 | 1B | 2450.84 |
- | | 2 | 2B | 7611.45 | + | | 2 | 2B | 7611.45 |
| 3 | 1T | 10314.29 | | 3 | 1T | 10314.29 | ||
+ | |||
+ | ====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 143: | Ligne 162: | ||
* Rapport technique original [(cite: | * Rapport technique original [(cite: | ||
author | author | ||
- | | + | |
institution | institution | ||
title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | ||
Ligne 179: | Ligne 198: | ||
^ allongement | ^ allongement | ||
^ nombre d' | ^ nombre d' | ||
- | ^ vitesse de rotation | + | ^ vitesse de rotation |
==== Propriétés matériau | ==== Propriétés matériau | ||
- | Le matériau original du rotor 68 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 68 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v est considéré : |
- | Propriétés considérées : alliage de titane Ti-6Al-4v : | ||
- | ^ | + | ^ |
^ alliage | ^ alliage | ||
^ module d' | ^ module d' | ||
Ligne 218: | Ligne 236: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | 1T | 10374, | + | | 3 | 1T | 10374, |
+ | ====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 234: | Ligne 262: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | 1T | 10308, | + | | 3 | 1T | 10308, |
Ligne 242: | Ligne 270: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | 1T | 10314, | + | | 3 | 1T | 10314, |
+ | |||
+ | ====Diagramme de Campbell==== | ||
+ | Comparaison de l' | ||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | aube initiale (orange), aube de référence (grise)</ | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
</ | </ | ||
+ | |||
</ | </ | ||
- public/modeles/rotor_68/accueil.1680811087.txt.gz
- Dernière modification : 2023/04/06 15:58
- de solenekojtych