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Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_21:accueil [2022/09/16 14:10] – alainbatailly | public:modeles:rotor_21:accueil [2023/04/05 09:04] (Version actuelle) – modification externe 127.0.0.1 | ||
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<btn type=" | <btn type=" | ||
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- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Original model ===== | + | ===== About ===== |
Rotor 21 is part of a research program to study the experimental performances of a stage when the design blade loading in the rotor tip region has been substantially reduced. In | Rotor 21 is part of a research program to study the experimental performances of a stage when the design blade loading in the rotor tip region has been substantially reduced. In | ||
order to produce the same overall pressure ratio as a reference stage (rotor 11), the blade loading levels in the midspan portion of the present rotor blade had to be relatively high. | order to produce the same overall pressure ratio as a reference stage (rotor 11), the blade loading levels in the midspan portion of the present rotor blade had to be relatively high. | ||
- | * Original technical report [(cite: | + | * Original technical report [(cite: |
- | author | + | author |
- | title | + | |
- | institution = {NASA Lewis Research Center Cleveland, OH, United States}, | + | institution |
- | note | + | |
+ | | ||
+ | | ||
</ | </ | ||
* Picture : | * Picture : | ||
Ligne 25: | Ligne 27: | ||
- | ===== Useful documents | + | <callout type=" |
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
- | | + | |
- | * CSV file of the blade geometry : {{ : | + | ===== Reference blade ===== |
+ | |||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
===== Geometry ===== | ===== Geometry ===== | ||
Ligne 37: | Ligne 45: | ||
===== Aerodynamic design | ===== Aerodynamic design | ||
- | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
^ pressure ratio | [-] | 1.57 | | ^ pressure ratio | [-] | 1.57 | | ||
^ mass flow | ^ mass flow | ||
Ligne 48: | Ligne 56: | ||
===== Material properties | ===== Material properties | ||
- | The original material of the rotor 21 is not defined in the NASA report. | + | The original material of the rotor 21 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 60: | Ligne 66: | ||
- | First three natural frequencies (with clamped root) for the mesh: | + | ==== CAD model ==== |
- | | + | |
- | - <fc # | + | The CAD model is computed with the open source code OpenMCAD[(cite: |
- | - <fc # | + | |
+ | < | ||
+ | <col md=" | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | ==== Natural frequencies ==== | ||
+ | |||
+ | |||
+ | First three natural frequencies (with clamped root) for the mesh computed with OpenMCAD[(cite: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | ||
+ | | 2 | 2B | 5410.9 | ||
+ | | 3 | 1T | 8729.48 | ||
+ | |||
+ | |||
+ | |||
+ | ===== Initial blade ===== | ||
+ | |||
+ | The **initial blade** is defined with in-house LAVA parameters[(cite:Kojtych_2022_Methodology)] computed from the reference blade CAD model. The initial blade is usually used as starting point for an optimization process. Its geometry is similar to the one of the reference blade. | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== Natural frequencies ==== | ||
+ | |||
+ | First three natural frequencies (with clamped root) | ||
+ | |||
+ | * from the whole mesh: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ | ||
+ | | 1 | 1B | 1507.80 | ||
+ | | 2 | ||
+ | | 3 | 1T | 8689.96 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ | ||
+ | | 1 | 1B | 1507.89 | 239, | ||
+ | | 2 | 2B | 5411.17 | ||
+ | | 3 | ||
- | ===== CAD ===== | ||
- | {{ : | ||
</ | </ | ||
+ | |||
<pane id=" | <pane id=" | ||
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<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Modèle original | + | ===== À propos |
Le rotor 21 fait partie d'un programme de recherche visant à étudier les performances expérimentales d'un étage de soufflante lorsque la charge des aubes dans la région de l' | Le rotor 21 fait partie d'un programme de recherche visant à étudier les performances expérimentales d'un étage de soufflante lorsque la charge des aubes dans la région de l' | ||
- | * Rapport technique original [(cite: | + | * Rapport technique original [(cite: |
- | author | + | author |
- | title | + | |
- | institution = {NASA Lewis Research Center Cleveland, OH, United States}, | + | institution |
- | note | + | |
+ | | ||
+ | | ||
</ | </ | ||
* Photographie : | * Photographie : | ||
Ligne 93: | Ligne 153: | ||
< | < | ||
- | ===== Documents utiles | ||
- | | + | |
- | * Fichier CSV de la géométrie : {{ : | + | <callout type=" |
+ | | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Aube de référence ===== | ||
+ | |||
+ | L' | ||
===== Géométrie ===== | ===== Géométrie ===== | ||
Ligne 116: | Ligne 184: | ||
===== Propriétés matériau | ===== Propriétés matériau | ||
- | Le matériau original du rotor 21 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 21 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v |
- | + | ||
- | Propriétés considérées : | + | |
^ | ^ | ||
Ligne 127: | Ligne 193: | ||
^ limite élastique | ^ limite élastique | ||
- | Fréquences des trois premiers modes (noeuds de la base encastrés) pour le maillage : | ||
- | - <fc # | ||
- | - <fc # | ||
- | - <fc # | ||
- | ===== CAO ===== | + | ==== Modèle |
- | {{ : | + | Le modèle CAO est obtenu avec OpenMCAD[(cite: |
+ | |||
+ | < | ||
+ | <col md=" | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </ | ||
+ | <col md=" | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | |||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1512, | ||
+ | | 2 | 2F | 5410, | ||
+ | | 3 | 1T | 8729, | ||
+ | |||
+ | |||
+ | ===== Aube initiale ===== | ||
+ | |||
+ | L' | ||
+ | |||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés), | ||
+ | |||
+ | * pour le maillage complet : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1507, | ||
+ | | 2 | 2F | 5410, | ||
+ | | 3 | 1T | 8689, | ||
+ | |||
+ | |||
+ | * pour le modèle réduit : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1507, | ||
+ | | 2 | 2F | 5411, | ||
+ | | 3 | 1T | 8691, | ||
</ | </ | ||
- | </ | ||
+ | </ | ||
- public/modeles/rotor_21/accueil.txt
- Dernière modification : 2023/04/05 09:04
- de 127.0.0.1