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Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente Prochaine révisionLes deux révisions suivantes | ||
public:modeles:rotor_04:accueil [2023/02/21 21:16] – [Documents utiles] 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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* Original technical report [(cite: | * Original technical report [(cite: | ||
- | author | + | |
- | title | + | |
- | institution = {NASA Lewis Research Center Cleveland, OH, United States}, | + | institution |
- | note | + | |
+ | | ||
+ | | ||
+ | } | ||
</ | </ | ||
+ | |||
+ | |||
* Picture : | * Picture : | ||
{{ : | {{ : | ||
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- | ===== Useful documents | ||
- | | + | <callout type=" |
- | * 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 | + | ==== Aerodynamic design |
- | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
^ pressure ratio | [-] | 1.8 | | ^ pressure ratio | [-] | 1.8 | | ||
^ mass flow | ^ mass flow | ||
Ligne 51: | Ligne 64: | ||
^ 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' | ||
Ligne 62: | Ligne 75: | ||
^ 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 | 1678.08 | ||
+ | | 2 | 2B | 6508.62 | ||
+ | | 3 | 1T | 8874.56 | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ===== 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 | 1682.55 | ||
+ | | 2 | 2B | 6515.28 | ||
+ | | 3 | 1T | 8895.29 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 1682.57 | ||
+ | | 2 | 2B | 6516.35 | ||
+ | | 3 | 1T | 8897.12 | ||
</ | </ | ||
- | + | ||
<pane id=" | <pane id=" | ||
<btn type=" | <btn type=" | ||
<modal id=" | <modal id=" | ||
- | **[[https:// | + | **[[https:// |
</ | </ | ||
- | ===== Modèle original | + | ===== À propos |
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' | ||
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- | ===== 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 113: | Ligne 183: | ||
{{ : | {{ : | ||
- | ===== Caractéristiques aérodynamiques | + | ==== Caractéristiques aérodynamiques |
^ ^ unités | ^ ^ unités | ||
^ taux de compression | ^ taux de compression | ||
Ligne 124: | 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 135: | 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 148: | Ligne 214: | ||
</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
<col md=" | <col md=" | ||
- | {{: | + | {{ : |
< | < | ||
</ | </ | ||
Ligne 158: | Ligne 224: | ||
</ | </ | ||
</ | </ | ||
- | </ | + | |
==== 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 ===== | ||
Ligne 180: | Ligne 246: | ||
^ 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 188: | 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