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public:modeles:rotor_55:accueil [2022/09/16 10:09] – supprimée - modification externe (Unknown date) 127.0.0.1 | public:modeles:rotor_55:accueil [2023/04/14 12:34] – [Fréquences propres] solenekojtych | ||
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+ | ====== Rotor 55 ====== | ||
+ | |||
+ | < | ||
+ | * [[# | ||
+ | * [[# | ||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | ===== About ===== | ||
+ | |||
+ | Rotor 55 is part of a research program to study fan stages suitable for use in engines for quiet powered lift aircraft. Experimental studies have been conducted on fan stages suitable for use in engines for quiet powered lift aircraft using the externally blown flap. The externally blown flap aircraft requires a large flow of low velocity air for effective lift and low noise during take-off and landing. To meet the low noise requirement, | ||
+ | |||
+ | * Original technical report [(cite: | ||
+ | author | ||
+ | date = {1973}, | ||
+ | institution | ||
+ | title = {Performance of a 1.20-pressure-ratio STOL fan stage at three rotor blade setting angles}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | * Picture : | ||
+ | |||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | * < | ||
+ | author | ||
+ | title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
+ | year = {1975}, | ||
+ | url = {https:// | ||
+ | </ | ||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | ===== Reference blade ===== | ||
+ | |||
+ | The **reference blade** is defined with multiple-circular arc profiles[(cite: | ||
+ | |||
+ | ==== Geometry ==== | ||
+ | |||
+ | The geometry of rotor 55 is described in the [[https:// | ||
+ | {{ : | ||
+ | |||
+ | ==== Aerodynamic design | ||
+ | |||
+ | ^ ^ unit ^ values | ||
+ | ^ pressure ratio | [-] | 1.2 | | ||
+ | ^ mass flow | ||
+ | ^ tip speed | ||
+ | ^ tip solidity | ||
+ | ^ aspect ratio | [-] | 1.43 | | ||
+ | ^ number of blades | ||
+ | ^ rotative speed | [rad/ | ||
+ | |||
+ | ==== Material properties | ||
+ | |||
+ | The original material of the rotor 55 is not defined in the NASA report. A generic titanium Ti-6Al-4V is considered: | ||
+ | |||
+ | ^ | ||
+ | ^ alloy | [-] | Ti-6Al-4V | ||
+ | ^ 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 | 2781.095 | ||
+ | | 2 | 2B | 7272.47 | ||
+ | | 3 | 1T | 10993.56 | ||
+ | |||
+ | |||
+ | ===== 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 | 2773.988 | ||
+ | | 2 | 2B | 7262.86 | ||
+ | | 3 | 1T | 10987.09 | ||
+ | |||
+ | |||
+ | * from the reduced order model: | ||
+ | |||
+ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
+ | | 1 | 1B | 2774.422 | ||
+ | | 2 | 2B | 7266.25 | ||
+ | | 3 | 1T | 10995.95 | ||
+ | | | ||
+ | |||
+ | |||
+ | |||
+ | </ | ||
+ | |||
+ | |||
+ | <pane id=" | ||
+ | |||
+ | <btn type=" | ||
+ | <modal id=" | ||
+ | **[[https:// | ||
+ | </ | ||
+ | |||
+ | ===== À propos ===== | ||
+ | |||
+ | Le rotor 55 fait partie d'un programme de recherche visant à étudier les étages de soufflante susceptibles d' | ||
+ | |||
+ | * Rapport technique original [(cite: | ||
+ | author | ||
+ | date = {1973}, | ||
+ | institution | ||
+ | title = {Performance of a 1.20-pressure-ratio STOL fan stage at three rotor blade setting angles}, | ||
+ | number | ||
+ | url = {https:// | ||
+ | } | ||
+ | </ | ||
+ | * Photographie : | ||
+ | |||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | * < | ||
+ | author | ||
+ | title = {STOL short take off landing 55 GE General Electric 15 blade rotor showing blade damage. {R}ecords of the {N}ational {A}eronautics and {S}pace {A}dministration, | ||
+ | year = {1975}, | ||
+ | url = {https:// | ||
+ | </ | ||
+ | |||
+ | |||
+ | <callout type=" | ||
+ | * [[https:// | ||
+ | * {{ : | ||
+ | * {{ : | ||
+ | </ | ||
+ | |||
+ | ===== Aube de référence ===== | ||
+ | |||
+ | L' | ||
+ | |||
+ | ==== Géométrie ==== | ||
+ | |||
+ | La géométrie du rotor 55 est décrite dans le [[https:// | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ==== Caractéristiques aérodynamiques | ||
+ | ^ ^ unités | ||
+ | ^ taux de compression | ||
+ | ^ débit massique | ||
+ | ^ vitesse en tête | [m/s] | 213,3 | | ||
+ | ^ solidité en tête | ||
+ | ^ allongement | ||
+ | ^ nombre d' | ||
+ | ^ vitesse de rotation | ||
+ | |||
+ | ==== Propriétés matériau | ||
+ | |||
+ | Le matériau original du rotor 55 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v 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 | 2781, | ||
+ | | 2 | 2F | 7272, | ||
+ | | 3 | 1T | 10993, | ||
+ | |||
+ | |||
+ | ===== Aube initiale ===== | ||
+ | |||
+ | L' | ||
+ | |||
+ | |||
+ | ==== Fréquences propres ==== | ||
+ | Fréquences des trois premiers modes (noeuds du pied d'aube encastrés), | ||
+ | |||
+ | * pour le maillage complet : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1B | 2773, | ||
+ | | 2 | 2B | 7262, | ||
+ | | 3 | 1T | 10987, | ||
+ | |||
+ | |||
+ | * pour le modèle réduit : | ||
+ | |||
+ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
+ | | 1 | 1B | 2774, | ||
+ | | 2 | 2B | 7266, | ||
+ | | 3 | 1T | 10995, | ||
+ | |||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
- public/modeles/rotor_55/accueil.txt
- Dernière modification : 2023/04/14 12:34
- de solenekojtych