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 14:18] – [Géométrie] solenekojtych | public:modeles:rotor_02:accueil [2023/04/21 15:20] (Version actuelle) – solenekojtych | ||
|---|---|---|---|
| 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 29: | Ligne 29: | ||
| < | < | ||
| - | |||
| - | ===== 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 | ||
| Ligne 49: | Ligne 55: | ||
| ^ 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 60: | 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> | + | |
| ===== À propos ===== | ===== À propos ===== | ||
| Ligne 116: | Ligne 145: | ||
| {{ : | {{ : | ||
| - | ===== Caractéristiques aérodynamiques | + | ==== Caractéristiques aérodynamiques |
| ^ ^ unités | ^ ^ unités | ||
| ^ taux de compression | ^ taux de compression | ||
| Ligne 126: | Ligne 155: | ||
| - | ===== Propriétés matériau | + | ==== Propriétés matériau |
| - | Le matériau du rotor 2 est un alliage à base de nickel : un acier maraging de grade 200. | + | Le matériau |
| ^ | ^ | ||
| Ligne 137: | Ligne 166: | ||
| ^ limite élastique | ^ limite élastique | ||
| - | Fréquences des trois premiers modes (noeuds de la base encastrés) pour le maillage : | + | ==== Modèle CAO ==== |
| - | - <fc # | + | |
| - | - <fc # | + | |
| - | - <fc # | + | |
| - | ===== CAO ===== | + | < |
| + | <col md=" | ||
| + | </ | ||
| + | <col md=" | ||
| + | {{ : | ||
| + | < | ||
| + | </ | ||
| + | <col md=" | ||
| + | {{ : | ||
| + | < | ||
| + | </ | ||
| + | <col md=" | ||
| + | </ | ||
| + | </ | ||
| - | {{ :public:modeles: | + | |
| + | ==== Fréquences propres ==== | ||
| + | |||
| + | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés) pour le maillage obtenu avec OpenMCAD[(cite:Kojtych_2022_gene_aubes)] | ||
| + | |||
| + | <callout type=" | ||
| + | Il y a actuellement un problème sur le calcul des fréquences propres dans Aster. | ||
| + | </ | ||
| </ | </ | ||