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public:modeles:rotor_06:accueil [2022/09/16 10:17] – supprimée - modification externe (Unknown date) 127.0.0.1 | public:modeles:rotor_06:accueil [2023/04/05 09:04] (Version actuelle) – modification externe 127.0.0.1 | ||
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+ | ====== Rotor 6 ====== | ||
+ | |||
+ | < | ||
+ | * [[# | ||
+ | * [[# | ||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | ===== About ===== | ||
+ | |||
+ | Rotor 6 is part of a research program to study the effects of blade shape on efficiency and stall margin. A series of transonic rotors, including rotor 6 and 7, were design with the same exit total pressure distribution to investigate the effects of blade shape. | ||
+ | |||
+ | * Original technical report [(cite: | ||
+ | author | ||
+ | date = {1973}, | ||
+ | institution | ||
+ | title = {Overall and blade-element performance of a transonic compressor stage with multiple-circular-arc blades at tip speed of 419 meters per second}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | * Picture : | ||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Reference blade ===== | ||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
+ | |||
+ | |||
+ | ==== Geometry ==== | ||
+ | |||
+ | The geometry of rotor 6 is described in the [[https:// | ||
+ | {{ : | ||
+ | |||
+ | ==== Aerodynamic design | ||
+ | |||
+ | ^ ^ unit ^ value ^ | ||
+ | ^ pressure ratio | [-] | 1.63 | | ||
+ | ^ mass flow | ||
+ | ^ tip speed | ||
+ | ^ tip solidity | ||
+ | ^ aspect ratio | [-] | 2.5 | | ||
+ | ^ number of blades | ||
+ | ^ rotative speed | [rad/ | ||
+ | |||
+ | ==== Material properties | ||
+ | |||
+ | The material of rotor 6 is not defined in the original NASA report. A 200-grade maraging steel is considered: | ||
+ | |||
+ | ^ | ||
+ | ^ alloy | [-] | 18-Ni-200-maraging | ||
+ | ^ Young' | ||
+ | ^ density | ||
+ | ^ Poisson' | ||
+ | ^ yield stress | ||
+ | |||
+ | |||
+ | |||
+ | ==== 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 | 1640.38 | ||
+ | | 2 | 2B | 6276.11 | ||
+ | | 3 | 1T | 8059.88 | ||
+ | |||
+ | |||
+ | |||
+ | ===== 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 | 1645.39 | ||
+ | | 2 | 2B | 6297.39 | ||
+ | | 3 | 1T | 8100.85 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 1644.74 | ||
+ | | 2 | 2B | 6299.96 | ||
+ | | 3 | 1T | 8102.8 | ||
+ | |||
+ | |||
+ | |||
+ | </ | ||
+ | |||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | |||
+ | ===== À propos ===== | ||
+ | |||
+ | Le rotor 6 fait partie d'un programme de recherche visant à étudier les effets de la forme des pales sur l' | ||
+ | |||
+ | * Rapport technique original [(cite: | ||
+ | author | ||
+ | date = {1973}, | ||
+ | institution | ||
+ | title = {Overall and blade-element performance of a transonic compressor stage with multiple-circular-arc blades at tip speed of 419 meters per second}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | * Photographie : | ||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | |||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | |||
+ | ===== Aube de référence ===== | ||
+ | L' | ||
+ | |||
+ | ==== Géométrie ==== | ||
+ | |||
+ | La géométrie du rotor 6 est décrite dans le [[https:// | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ==== Caractéristiques aérodynamiques | ||
+ | ^ ^ unités | ||
+ | ^ taux de compression | ||
+ | ^ débit massique | ||
+ | ^ vitesse en tête | [m/s] | 419 | | ||
+ | ^ solidité en tête | ||
+ | ^ allongement | ||
+ | ^ nombre d' | ||
+ | ^ vitesse de rotation | ||
+ | |||
+ | |||
+ | ==== Propriétés matériau | ||
+ | |||
+ | Le matériau original du rotor 6 n'est pas défini dans le rapport de la NASA. Un acier maraging de grade 200 est considéré: | ||
+ | |||
+ | ^ | ||
+ | ^ alliage | ||
+ | ^ module d' | ||
+ | ^ masse volumique | ||
+ | ^ coefficient de Poisson | ||
+ | ^ limite élastique | ||
+ | |||
+ | |||
+ | |||
+ | ==== Modèle CAO ==== | ||
+ | |||
+ | Le modèle CAO est obtenu avec OpenMCAD[(cite: | ||
+ | |||
+ | < | ||
+ | <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 | 1640, | ||
+ | | 2 | 2F | 6276, | ||
+ | | 3 | 1T | 8059, | ||
+ | |||
+ | |||
+ | ===== Aube initiale ===== | ||
+ | |||
+ | L' **aube initiale** est définie par des paramètres spécifiques au LAVA[(cite: | ||
+ | |||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés), | ||
+ | |||
+ | * pour le maillage complet : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1645, | ||
+ | | 2 | 2F | 6297, | ||
+ | | 3 | 1T | 8100, | ||
+ | |||
+ | |||
+ | * pour le modèle réduit : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1F | 1644, | ||
+ | | 2 | 2F | 6299, | ||
+ | | 3 | 1T | 8102, | ||
+ | </ | ||
+ | |||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||