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Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente | ||
public:modeles:rotor_03:accueil [2023/03/01 11:49] – [About] solenekojtych | public:modeles:rotor_03:accueil [2024/08/05 15:43] (Version actuelle) – ancienne révision (2024/08/05 15:42) restaurée rafaelbarraud | ||
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Results show that the pressure ratio, temperature ratio and efficiency of this rotor are higher than design predicted values because of the actual losses being generally lower than those assumed in the design. | Results show that the pressure ratio, temperature ratio and efficiency of this rotor are higher than design predicted values because of the actual losses being generally lower than those assumed in the design. | ||
- | * Original NASA technical report [(cite: | + | * Original NASA technical report [(cite: |
- | < | + | |
@TechReport{hager1972performance, | @TechReport{hager1972performance, | ||
author | author | ||
Ligne 43: | Ligne 42: | ||
<callout type=" | <callout type=" | ||
* [[https:// | * [[https:// | ||
- | * {{ : | + | * {{ : |
- | * {{ :public: | geometrical parameters file}} (.csv), usable as input of OpenMCAD[(cite: | + | * {{ :public:modeles: |
</ | </ | ||
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==== Aerodynamic design | ==== Aerodynamic design | ||
- | ^ ^ unit ^ values | + | ^ ^ unit ^ value ^ |
^ pressure ratio | [-] | 1.801 | | ^ pressure ratio | [-] | 1.801 | | ||
^ mass flow | ^ mass flow | ||
Ligne 66: | Ligne 65: | ||
^ tip solidity | ^ tip solidity | ||
^ aspect ratio | [-] | 2.53 | | ^ aspect ratio | [-] | 2.53 | | ||
- | ^ rotative | + | ^ nominal rotation |
==== Material properties | ==== Material properties | ||
- | The material of rotor 3 is defined in the original NASA report. A 200-grade maraging steel is considered: | + | Rotor 3 is made of a 200-grade maraging steel, but the exact material properties are not provided in the NASA report. The following properties are considered : |
- | ^ | + | ^ |
^ alloy | [-] | 18-Ni-200-maraging | ^ alloy | [-] | 18-Ni-200-maraging | ||
^ Young' | ^ Young' | ||
Ligne 104: | Ligne 103: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 |<fc # | + | | 1 |
- | | 2 |<fc # | + | | 2 |
- | | 3 |<fc # | + | | 3 |
+ | ====Campbell diagram==== | ||
+ | Evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed, for the mesh computed with OpenMCAD[(cite: | ||
+ | |||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
===== Initial blade ===== | ===== Initial blade ===== | ||
Ligne 124: | Ligne 131: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 |<fc # | + | | 1 |1B | 1728.06 |
- | | 2 |<fc # | + | | 2 |2B | 6559.27 |
- | | 3 |<fc # | + | | 3 |1T | 8243.04 |
Ligne 132: | Ligne 139: | ||
^ Mode ^ Type ^ Natural angular frequency (rad/ | ^ Mode ^ Type ^ Natural angular frequency (rad/ | ||
- | | 1 |<fc # | + | | 1 |
- | | 2 |<fc # | + | | 2 |
- | | 3 |<fc # | + | | 3 |
+ | Comparison of the evolution of the natural frequencies of the first 3 vibration modes, as a function of rotation speed for the initial and the reference blade: | ||
+ | {{ : | ||
+ | |||
+ | |||
+ | < | ||
+ | |||
+ | initial blade (orange), reference blade (gray) </ | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
</ | </ | ||
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- | * Rapport technique original [(cite: | + | * Rapport technique original [(cite: |
- | < | + | |
@TechReport{hager1972performance, | @TechReport{hager1972performance, | ||
- | | + | |
- | | + | |
institution | institution | ||
- | | + | |
- | | + | |
url = {https:// | url = {https:// | ||
} | } | ||
Ligne 186: | Ligne 202: | ||
* [[https:// | * [[https:// | ||
* {{ : | * {{ : | ||
- | * {{ | fichier de paramètres géométriques}} (.csv), utilisable en entrée de OpenMCAD[(cite: | + | * {{ : |
</ | </ | ||
Ligne 207: | Ligne 223: | ||
^ solidité en tête | ^ solidité en tête | ||
^ allongement | ^ allongement | ||
- | ^ vitesse de rotation | + | ^ vitesse de rotation |
==== Propriétés matériau | ==== Propriétés matériau | ||
- | Le matériau | + | Le matériau du rotor 3 est un alliage à base de nickel : un acier maraging de grade 200, mais ses caractéristiques ne sont pas fournies. Les propriétés considérées sont : |
^ | ^ | ||
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^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 |<fc # | + | | 1 |1F | 1722,54 | 274, |
- | | 2 |<fc # | + | | 2 |2F |
- | | 3 |<fc # | + | | 3 |1T | 8224,31 | 1308, |
+ | ====Diagramme de Campbell==== | ||
+ | Évolution des fréquences propres des 3 premiers modes, en fonction de la vitesse de rotation, pour le maillage obtenu avec OpenMCAD[(cite: | ||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
+ | |||
+ | |||
===== Aube initiale ===== | ===== Aube initiale ===== | ||
Ligne 261: | Ligne 287: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 |<fc # | + | | 1 |1F | 1728,06 | 275,04 | |
- | | 2 |<fc # | + | | 2 |2F | 6559,27 | 1043, |
- | | 3 |<fc # | + | | 3 |1T | 8243,04 | 1311, |
Ligne 269: | Ligne 295: | ||
^ Mode ^ Type ^ Pulsation propre (rad/ | ^ Mode ^ Type ^ Pulsation propre (rad/ | ||
- | | 1 |<fc # | + | | 1 |1F | 1728,11 | 275,03 | |
- | | 2 |<fc # | + | | 2 |2F |
- | | 3 |<fc # | + | | 3 |1T | 8245,30 | 1312, |
</ | </ | ||
+ | ====Diagramme de Campbell==== | ||
+ | Comparaison de l' | ||
+ | |||
+ | {{ : | ||
+ | < | ||
+ | |||
+ | aube initiale (orange), aube de référence (grise)</ | ||
+ | |||
+ | * {{ : | ||
+ | * {{ : | ||
+ | |||
</ | </ | ||
- public/modeles/rotor_03/accueil.1677689348.txt.gz
- Dernière modification : 2023/04/05 08:59
- (modification externe)