Différences
Ci-dessous, les différences entre deux révisions de la page.
Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_02:accueil [2023/03/01 13:43] – [Modèle original] solenekojtych | public:modeles:rotor_02:accueil [2023/04/21 15:20] (Version actuelle) – solenekojtych | ||
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Ligne 7: | Ligne 7: | ||
<pane id=" | <pane id=" | ||
- | <btn type=" | + | <callout |
- | <modal id=" | + | This model is not public, as there were problems in the computation of eigenfrequencies with code Aster (see the bottom of the page). |
- | **[[https:// | + | </callout> |
- | </ | + | |
+ | ===== About ===== | ||
- | ===== Original model ===== | ||
Rotor 2 is part of a research program to study aspect ratio because the use of high aspect ratio blading can lead to a decrease in the axial length of compressors and therefore a reduction of their size and weight. To investigate the effects of aspect ratio on compressor range and efficiency, two transonic rotors (rotor 1 and 2) were designed and tested. The variation in aspect ratio was based on a change in aerodynamic chord, and the solidity was kept the same by varying the number of blades. | Rotor 2 is part of a research program to study aspect ratio because the use of high aspect ratio blading can lead to a decrease in the axial length of compressors and therefore a reduction of their size and weight. To investigate the effects of aspect ratio on compressor range and efficiency, two transonic rotors (rotor 1 and 2) were designed and tested. The variation in aspect ratio was based on a change in aerodynamic chord, and the solidity was kept the same by varying the number of blades. | ||
Ligne 22: | Ligne 22: | ||
title = {Performance of a transonic compressor rotor with an aspect ratio of 6.5}, | title = {Performance of a transonic compressor rotor with an aspect ratio of 6.5}, | ||
number | number | ||
- | url = {https:// | + | url = {https:// |
+ | | ||
</ | </ | ||
* Picture : | * Picture : | ||
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< | < | ||
- | |||
- | ===== Useful documents | ||
- | | + | <callout type=" |
- | * 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 2 is described in the [[https:// | The geometry of rotor 2 is described in the [[https:// | ||
{{ : | {{ : | ||
- | ===== Aerodynamic design | + | ==== Aerodynamic design |
- | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
^ pressure ratio | [-] | 1.53 | | ^ pressure ratio | [-] | 1.53 | | ||
^ mass flow | ^ mass flow | ||
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^ aspect ratio | [-] | 6.5 | | ^ aspect ratio | [-] | 6.5 | | ||
^ rotative speed | [rad/ | ^ rotative speed | [rad/ | ||
- | ===== Material properties | ||
- | Rotor 2 is made of a 200-grade maraging steel | + | ==== Material properties |
- | ^ | + | The material of rotor 2 is not defined in the original NASA report. A 200-grade maraging steel is considered: |
+ | |||
+ | ^ | ||
^ alloy | [-] | 18-Ni-200-maraging | ^ alloy | [-] | 18-Ni-200-maraging | ||
^ Young' | ^ Young' | ||
Ligne 59: | Ligne 67: | ||
^ 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: | ||
+ | |||
+ | <callout type=" | ||
+ | Currently not available because of a problem to compute them with aster from the mesh of the reference blade. | ||
+ | </ | ||
</ | </ | ||
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<pane id=" | <pane id=" | ||
- | <btn type=" | + | <callout |
- | <modal id=" | + | Ce modèle n'est pas public, en raison de problèmes sur le calcul des fréquences propres avec code Aster (voir bas de page) |
- | **[[https:// | + | </callout> |
- | </modal> | + | |
- | ===== Modèle original | + | ===== À propos |
Le rotor 2 fait partie d'un programme de recherche visant à étudier l’allongement des aubes, car l' | Le rotor 2 fait partie d'un programme de recherche visant à étudier l’allongement des aubes, car l' | ||
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- | ===== Documents utiles | ||
- | | + | <callout type=" |
- | * Fichier CSV de la géométrie : {{ : | + | |
+ | * {{ : | ||
+ | </ | ||
- | ===== Géométrie | + | |
+ | ===== Aube de référence | ||
+ | |||
+ | L' | ||
+ | |||
+ | |||
+ | ==== Géométrie | ||
La géométrie du rotor 2 est décrite dans le [[https:// | La géométrie du rotor 2 est décrite dans le [[https:// | ||
Ligne 108: | Ligne 145: | ||
{{ : | {{ : | ||
- | ===== Caractéristiques aérodynamiques | + | ==== Caractéristiques aérodynamiques |
^ ^ unités | ^ ^ unités | ||
^ taux de compression | ^ taux de compression | ||
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- | ===== Propriétés matériau | + | ==== Propriétés matériau |
- | Le matériau du rotor 2 est un alliage à base de nickel : un acier maraging de grade 200 | + | Le matériau |
^ | ^ | ||
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^ limite élastique | ^ limite élastique | ||
- | Fréquences des trois premiers modes (noeuds de la base encastrés) pour le maillage : | + | ==== Modèle CAO ==== |
- | - <fc #c0c0c0>(1B)</fc>: 1686,8 rad/s | + | |
- | - <fc #c0c0c0>(2B)</fc>: 6385,2 rad/s / 1016,2 Hz | + | <grid> |
- | - <fc #c0c0c0>(1T)</fc>: 8140,1 rad/s / 1295,5 Hz | + | <col md=" |
+ | </col> | ||
+ | <col md=" | ||
+ | {{ :public: | ||
+ | < | ||
+ | </col> | ||
+ | <col md=" | ||
+ | {{ : | ||
+ | < | ||
+ | </col> | ||
+ | <col md=" | ||
+ | </col> | ||
+ | </grid> | ||
+ | |||
+ | |||
+ | ==== Fréquences propres ==== | ||
- | ===== CAO ===== | + | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite: |
- | {{ : | + | <callout type=" |
+ | Il y a actuellement un problème sur le calcul des fréquences propres dans Aster. | ||
+ | </ | ||
</ | </ |
- public/modeles/rotor_02/accueil.1677696218.txt.gz
- Dernière modification : 2023/04/05 08:59
- (modification externe)