Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
| public:modeles:rotor_65:accueil [2023/04/02 00:13] – [Material properties] ikrambeghdadi | public:modeles:rotor_65:accueil [2024/07/30 13:02] (Version actuelle) – [Campbell diagram] rafaelbarraud | ||
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| Ligne 14: | Ligne 14: | ||
| ===== About ===== | ===== About ===== | ||
| - | This report presents the overall and blade-element performances of the scaled fan | ||
| - | stage. The stage was designated "stage 65" for tests in the Lewis facility. Data were | ||
| - | obtained at speeds of 40 to 100 percent of design speed. Blade-element survey data were | ||
| - | taken at 11 radial positions for the inlet guide vanes and the rotor, at 7 radial positions | ||
| - | for the bypass stator, and at 3 radial positions for the core stator. The data presented | ||
| - | in this report are in tabular as well as plotted form. | ||
| - | | + | Rotor 65 is part of a NASA research program in collaboration with Pratt & Whitney aiming at reducing the noise level of the JT8D engines (used in 1976 in Boeing 727 and 737) while maintaining their aerodynamic performance. Rotor 65 is a single-stage fan designed to replace the two-stage fan used in the JT8D engine. |
| + | |||
| + | | ||
| author | author | ||
| date = {1976}, | date = {1976}, | ||
| Ligne 32: | Ligne 28: | ||
| * Picture : | * Picture : | ||
| {{ : | {{ : | ||
| - | < | + | < |
| <callout type=" | <callout type=" | ||
| * [[https:// | * [[https:// | ||
| * {{ : | * {{ : | ||
| - | * {{ | geometrical parameters file}} (.csv), usable as input of OpenMCAD[(cite: | + | * {{: |
| </ | </ | ||
| Ligne 53: | Ligne 49: | ||
| ==== Aerodynamic design | ==== Aerodynamic design | ||
| - | ^ ^ | + | ^ ^ |
| ^ pressure ratio | [-] | 1.679 | | ^ pressure ratio | [-] | 1.679 | | ||
| ^ mass flow | ^ mass flow | ||
| ^ tip speed | ^ tip speed | ||
| ^ aspect ratio | [-] | 1.679 | | ^ aspect ratio | [-] | 1.679 | | ||
| - | ^ rotative | + | ^ nominal rotation |
| ==== Material properties | ==== Material properties | ||
| - | The material of the rotor 65 is titanium according to the report, but its characteristics are not provided. | + | The material of the rotor 65 is titanium according to the report, but its characteristics are not provided. |
| - | + | ||
| - | Protected considered: | + | |
| - | + | ||
| - | ^ | + | |
| - | ^ alloy | [-] | 18-Ni-200-maraging | + | |
| - | ^ Young' | + | |
| - | ^ density | + | |
| - | ^ Poisson' | + | |
| - | ^ yield stress | + | |
| + | ^ ^ units ^ values | ||
| + | ^ alloy | [-] | Ti-6Al-4V | ||
| + | ^ Young' | ||
| + | ^ density | ||
| + | ^ Poisson' | ||
| + | ^ yield stress | ||
| ==== CAD model ==== | ==== CAD model ==== | ||
| Ligne 97: | Ligne 90: | ||
| First three natural frequencies (with clamped root) for the mesh computed with OpenMCAD[(cite: | First three natural frequencies (with clamped root) for the mesh computed with OpenMCAD[(cite: | ||
| - | ^ Mode ^ <fc #ff0000>Type</ | + | ^ Mode ^ Type ^ Natural angular frequency (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 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: | ||
| + | |||
| + | {{ : | ||
| + | < | ||
| + | |||
| + | * {{ : | ||
| + | * {{ : | ||
| Ligne 117: | Ligne 118: | ||
| * from the whole mesh: | * from the whole mesh: | ||
| - | ^ Mode ^ <fc #ff0000>Type</ | + | ^ Mode ^ Type ^ Natural angular frequency (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 3 |
| * from the reduced order model: | * from the reduced order model: | ||
| - | ^ Mode ^ <fc #ff0000>Type</ | + | ^ Mode ^ Type ^ Natural angular frequency (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 3 |
| + | |||
| + | ====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 148: | Ligne 163: | ||
| ===== À propos ===== | ===== À propos ===== | ||
| - | Ce rapport présente les performances globales et des pales du ventilateur à l' | + | Le rotor 65 a été étudié |
| - | organiser. L' | + | |
| - | obtenu à des vitesses de 40 à 100 % de la vitesse de conception. Les données d' | + | |
| - | pris en 11 positions radiales | + | |
| - | pour le stator de dérivation, | + | |
| - | dans ce rapport sont présentés sous forme de tableaux et de graphiques. | + | |
| * Rapport technique original [(cite: | * Rapport technique original [(cite: | ||
| Ligne 166: | Ligne 176: | ||
| * Photographie : | * Photographie : | ||
| {{ : | {{ : | ||
| - | < | + | < |
| <callout type=" | <callout type=" | ||
| * [[https:// | * [[https:// | ||
| * {{ : | * {{ : | ||
| - | * {{ | fichier de paramètres géométriques}} (.csv), utilisable en entrée de OpenMCAD[(cite: | + | * {{ : |
| </ | </ | ||
| Ligne 193: | Ligne 203: | ||
| ^ vitesse en tête | [m/s] | 419.1 | | ^ vitesse en tête | [m/s] | 419.1 | | ||
| ^ allongement | ^ allongement | ||
| - | ^ vitesse de rotation | + | ^ vitesse de rotation |
| Ligne 200: | Ligne 210: | ||
| ==== Propriétés matériau | ==== Propriétés matériau | ||
| - | Le matériau du rotor 65 est le titane d' | + | Le matériau du rotor 65 est le titane d' |
| - | Propriétés considérées : allaige Ti-6Al-4V | + | ^ |
| - | + | ^ alliage | |
| - | ^ | + | ^ module d' |
| - | ^ alliage | + | ^ masse volumique |
| - | ^ module d' | + | ^ coefficient de Poisson |
| - | ^ masse volumique | + | ^ limite élastique |
| - | ^ coefficient de Poisson | + | |
| - | ^ limite élastique | + | |
| ==== Modèle CAO ==== | ==== Modèle CAO ==== | ||
| Ligne 234: | Ligne 242: | ||
| Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | ||
| - | ^ Mode ^ Type ^ Pulsation propre (rad/ | + | ^ Mode ^ Type ^ Pulsation propre (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 3 |
| + | ====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 250: | Ligne 268: | ||
| * pour le maillage complet : | * pour le maillage complet : | ||
| - | ^ Mode ^ Type ^ Pulsation propre (rad/ | + | ^ Mode ^ Type ^ Pulsation propre (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 3 |
| Ligne 259: | Ligne 277: | ||
| * pour le modèle réduit : | * pour le modèle réduit : | ||
| - | ^ Mode ^ Type ^ Pulsation propre (rad/ | + | ^ Mode ^ Type ^ Pulsation propre (rad/ |
| - | | 1 | + | | 1 |
| - | | 2 | + | | 2 |
| - | | 3 | + | | 3 |
| + | |||
| + | |||
| + | ====Diagramme de Campbell==== | ||
| + | Comparaison de l' | ||
| + | |||
| + | {{ : | ||
| + | < | ||
| + | aube initiale (orange), aube de référence (grise)</ | ||
| + | * {{ : | ||
| + | * {{ : | ||
| </ | </ | ||
| </ | </ | ||
- public/modeles/rotor_65/accueil.1680408819.txt.gz
- Dernière modification : 2023/04/05 08:59
- (modification externe)