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Prochaine révision | Révision précédente Prochaine révisionLes deux révisions suivantes | ||
public:modeles:rotor_04:accueil [2023/02/21 21:40] – ikrambeghdadi | public:modeles:rotor_04:accueil [2023/03/28 09:24] – [Modifier - Pane] solenekojtych | ||
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Ligne 9: | Ligne 9: | ||
<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Original model ===== | + | ===== About ===== |
Rotor 4 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 with varying blade solidity achieved by changing the blade chord length : rotor 3 with a tip solidity of 1.3, rotor 4 with a tip solidity of 1.1 and rotor 5 with a tip solidity of 1.5. The results showed that the efficiency and pressure ratio were higher for a rotor with a blade tip solidity of 1.5 than for a rotor with a solidity of 1.1. | Rotor 4 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 with varying blade solidity achieved by changing the blade chord length : rotor 3 with a tip solidity of 1.3, rotor 4 with a tip solidity of 1.1 and rotor 5 with a tip solidity of 1.5. The results showed that the efficiency and pressure ratio were higher for a rotor with a blade tip solidity of 1.5 than for a rotor with a solidity of 1.1. | ||
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Then, another series of tests has been conducted with blade tip solidities of 1.3 (rotor 14), 1.5 (rotor 8), and 1.7 (rotor 12). 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. | Then, another series of tests has been conducted with blade tip solidities of 1.3 (rotor 14), 1.5 (rotor 8), and 1.7 (rotor 12). 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 | + | institution |
- | title | + | |
- | institution = {NASA Lewis Research Center Cleveland, OH, United States}, | + | |
- | note | + | |
+ | } | ||
</ | </ | ||
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- | ===== Useful documents | + | |
+ | <callout type=" | ||
* [[https:// | * [[https:// | ||
- | * PDF of the NASA report : {{ : | + | * {{ : |
- | * CSV file of the blade geometry : {{ : | + | * {{ : |
+ | </ | ||
- | ===== Geometry | + | |
+ | ===== Reference blade ===== | ||
+ | |||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
+ | |||
+ | ==== Geometry | ||
The geometry of rotor 4 is described in the [[https:// | The geometry of rotor 4 is described in the [[https:// | ||
- | {{ : | + | {{ : |
- | ===== Aerodynamic design | ||
- | ^ ^ unit ^ values | + | ==== Aerodynamic design |
+ | |||
+ | ^ ^ unit ^ value ^ | ||
^ pressure ratio | [-] | 1.8 | | ^ pressure ratio | [-] | 1.8 | | ||
^ mass flow | ^ mass flow | ||
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^ rotative speed | [rad/ | ^ rotative speed | [rad/ | ||
- | ===== Material properties | + | ==== Material properties |
Rotor 4 is made of a 200-grade maraging steel | Rotor 4 is made of a 200-grade maraging steel | ||
- | ^ | + | ^ |
^ alloy | [-] | 18-Ni-200-maraging | ^ alloy | [-] | 18-Ni-200-maraging | ||
^ Young' | ^ Young' | ||
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^ yield stress | ^ yield stress | ||
- | First three natural frequencies (with clamped root) for the mesh: | ||
- | - <fc # | ||
- | - <fc # | ||
- | - <fc # | ||
==== CAD model ==== | ==== CAD model ==== | ||
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</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
Ligne 96: | Ligne 101: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
Ligne 105: | Ligne 110: | ||
===== Initial blade ===== | ===== Initial blade ===== | ||
- | The **initial blade** is defined with in-house LAVA parameters[(cite: | + | The **initial blade** is defined with in-house LAVA parameters[(cite: |
Ligne 117: | Ligne 122: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
Ligne 125: | Ligne 130: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 | + | | 1 |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
+ | |||
+ | </ | ||
- | |||
<pane id=" | <pane id=" | ||
<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ==== CAD model ==== | + | ===== À propos |
- | + | ||
- | 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 | 1F | 1018, | + | |
- | | 2 | 1T | 3542, | + | |
- | | 3 | 2F | 6094, | + | |
- | + | ||
- | + | ||
- | + | ||
- | + | ||
- | ===== 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 | 1F | 1019, | + | |
- | | 2 | 1T | 3539, | + | |
- | | 3 | 2F | 6074, | + | |
- | + | ||
- | + | ||
- | * from the reduced order model: | + | |
- | + | ||
- | ^ Mode ^ Type ^ Natural angular frequency (rad/ | + | |
- | | 1 | 1F | 1019, | + | |
- | | 2 | 1T | 3540, | + | |
- | | 3 | 2F | 6075, | + | |
- | + | ||
- | + | ||
- | + | ||
- | </ | + | |
- | + | ||
- | + | ||
- | + | ||
- | + | ||
- | ===== Modèle original | + | |
Le rotor 4 fait partie d'un programme de recherche visant à étudier les effets de la solidité de la rangée d' | Le rotor 4 fait partie d'un programme de recherche visant à étudier les effets de la solidité de la rangée d' | ||
Ligne 225: | Ligne 166: | ||
- | ===== 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 4 est décrite dans le [[https:// | La géométrie du rotor 4 est décrite dans le [[https:// | ||
Ligne 236: | Ligne 183: | ||
{{ : | {{ : | ||
- | ===== Caractéristiques aérodynamiques | + | ==== Caractéristiques aérodynamiques |
^ ^ unités | ^ ^ unités | ||
^ taux de compression | ^ taux de compression | ||
Ligne 247: | Ligne 194: | ||
- | ===== Propriétés matériau | + | ==== Propriétés matériau |
- | Le matériau du rotor 4 est un alliage à base de nickel : un acier maraging de grade 200 | + | Le matériau |
^ | ^ | ||
Ligne 258: | Ligne 205: | ||
^ limite élastique | ^ limite élastique | ||
- | Fréquences des trois premiers modes (noeuds de la base encastrés) pour le maillage : | ||
- | - <fc # | ||
- | - <fc # | ||
- | - <fc # | ||
==== Modèle CAO ==== | ==== Modèle CAO ==== | ||
Ligne 271: | Ligne 214: | ||
</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
Ligne 285: | Ligne 228: | ||
==== Fréquences propres ==== | ==== Fréquences propres ==== | ||
- | 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 | 1F | 1018,5 | 162,1 | + | | 1 | 1F |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
===== Aube initiale ===== | ===== Aube initiale ===== | ||
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^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1019,1 | 162,2 | + | | 1 | 1F | 1682,55 | 267,786 | |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
Ligne 311: | Ligne 254: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 | 1F | 1019,1 | + | | 1 | 1F | 1682,57 |
- | | 2 | + | | 2 |
- | | 3 | + | | 3 |
- | </ | ||
</ | </ | ||
+ | </ | ||
- public/modeles/rotor_04/accueil.txt
- Dernière modification : 2023/04/17 20:36
- de solenekojtych