Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_14:accueil [2023/02/22 00:51] – ikrambeghdadi | public:modeles:rotor_14:accueil [2023/04/05 09:04] (Version actuelle) – modification externe 127.0.0.1 | ||
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<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Original model ===== | + | ===== About ===== |
Rotor 14 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 14 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 30: | Ligne 30: | ||
- | + | <callout type=" | |
- | ===== Useful documents | + | |
* [[https:// | * [[https:// | ||
- | * PDF of the NASA report : {{ : | + | * {{ : |
- | * CSV file of the blade geometry : {{ : | + | * {{ : |
+ | </ | ||
+ | |||
+ | |||
+ | ===== Reference blade ===== | ||
+ | |||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
- | ===== Geometry | + | ==== Geometry ==== |
The geometry of rotor 14 is described in the [[https:// | The geometry of rotor 14 is described in the [[https:// | ||
{{ : | {{ : | ||
- | ===== Aerodynamic design | + | ==== Aerodynamic design |
- | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
^ pressure ratio | [-] | 1.75 | | ^ pressure ratio | [-] | 1.75 | | ||
^ mass flow | ^ mass flow | ||
Ligne 52: | Ligne 57: | ||
^ rotative speed | [rad/ | ^ rotative speed | [rad/ | ||
- | ===== Material properties | + | ==== Material properties |
- | The original material of the rotor 14 is not defined in the NASA report. | + | The original material of the rotor 14 is not defined in the NASA report. |
- | Considered properties: 200-grade maraging steel : | + | ^ |
- | + | ||
- | ^ | + | |
^ alloy | [-] | 18-Ni-200-maraging | ^ alloy | [-] | 18-Ni-200-maraging | ||
^ Young' | ^ Young' | ||
Ligne 65: | Ligne 68: | ||
^ yield stress | ^ yield stress | ||
- | First three natural frequencies (with clamped root) for the mesh: | ||
- | - <fc # | ||
- | - <fc # | ||
- | - <fc # | ||
- | ===== CAD ===== | ||
- | {{ : | + | ==== CAD model ==== |
+ | |||
+ | The CAD model is computed with the open source code OpenMCAD[(cite: | ||
+ | |||
+ | < | ||
+ | <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 | 1B | 1739.36 | ||
+ | | 2 | 2B | 6240.69 | ||
+ | | 3 | 1T | 8434.99 | ||
+ | |||
+ | |||
+ | |||
+ | ===== Initial blade ===== | ||
+ | |||
+ | The **initial blade** is defined with in-house LAVA parameters[(cite: | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== Natural frequencies ==== | ||
+ | |||
+ | First three natural frequencies (with clamped root) | ||
+ | |||
+ | * from the whole mesh: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 1739.44 | ||
+ | | 2 | 2B | 6259.56 | ||
+ | | 3 | 1T | 8425.56 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 1739.51 | ||
+ | | 2 | 2B | 6261.91 | ||
+ | | 3 | 1T | 8428.64 | ||
+ | |||
</ | </ | ||
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<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Modèle original | + | ===== À propos |
Le rotor 14 fait partie d'un programme de recherche visant à étudier les effets de la solidité des rangées d' | Le rotor 14 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 102: | Ligne 158: | ||
- | ===== Documents utiles | + | |
+ | <callout type=" | ||
* [[https:// | * [[https:// | ||
- | * PDF du rapport de la NASA : {{ : | + | * {{ : |
- | * Fichier CSV de la géométrie : {{ : | + | * {{ : |
+ | </ | ||
- | ===== Géométrie | + | |
+ | ===== Aube de référence | ||
+ | |||
+ | L' | ||
+ | |||
+ | ==== Géométrie | ||
La géométrie du rotor 14 est décrite dans le [[https:// | La géométrie du rotor 14 est décrite dans le [[https:// | ||
Ligne 113: | Ligne 176: | ||
{{ : | {{ : | ||
- | ===== Caractéristiques aérodynamiques | + | ==== Caractéristiques aérodynamiques |
^ ^ unités | ^ ^ unités | ||
^ taux de compression | ^ taux de compression | ||
Ligne 123: | Ligne 186: | ||
^ vitesse de rotation | ^ vitesse de rotation | ||
- | ===== Propriétés matériau | + | ==== Propriétés matériau |
- | Le matériau original du rotor 14 n'est pas défini dans le rapport de la NASA. | + | Le matériau original du rotor 14 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 137: | Ligne 198: | ||
- | Fréquences des trois premiers modes (noeuds de la base encastrés) pour le maillage : | ||
- | - <fc # | ||
- | - <fc # | ||
- | - <fc # | ||
- | ===== CAO ===== | + | ==== Modèle |
- | {{ :public: | + | Le modèle CAO est obtenu avec OpenMCAD[(cite:Kojtych_2022_gene_aubes)]. |
- | + | ||
- | </ | + | |
- | </ | + | |
+ | < | ||
+ | <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 | 1739, | ||
+ | | 2 | 2F | 6240, | ||
+ | | 3 | 1T | 8434, | ||
+ | |||
+ | |||
+ | ===== 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 | 1739, | ||
+ | | 2 | 2F | 6259, | ||
+ | | 3 | 1T | 8425, | ||
+ | |||
+ | |||
+ | * pour le modèle réduit : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1739, | ||
+ | | 2 | 2F | 6261, | ||
+ | | 3 | 1T | 8428, | ||
+ | |||
+ | |||
+ | |||
+ | </ | ||
+ | </ | ||
- public/modeles/rotor_14/accueil.txt
- Dernière modification : 2023/04/05 09:04
- de 127.0.0.1