Les deux révisions précédentes Révision précédente Prochaine révision | Révision précédente |
public:modeles:rotor_68:accueil [2023/04/06 15:57] – solenekojtych | public:modeles:rotor_68:accueil [2024/08/01 16:42] (Version actuelle) – [Natural frequencies] rafaelbarraud |
---|
* Original technical report [(cite:urasek1979design>Urasek, D. C. //et al// «Performance of two-stage fan having low-aspect-ratio first-stage rotor blading » 1979. {{ https://ntrs.nasa.gov/citations/19780025165|pdf}})]: <code>@TechReport{urasek1979design, | * Original technical report [(cite:urasek1979design>Urasek, D. C. //et al// «Performance of two-stage fan having low-aspect-ratio first-stage rotor blading » 1979. {{ https://ntrs.nasa.gov/citations/19780025165|pdf}})]: <code>@TechReport{urasek1979design, |
author = {Urasek, D. C. and Gorrell, W. T. and Cunnan, W. S.}, | author = {Urasek, D. C. and Gorrell, W. T. and Cunnan, W. S.}, |
date = {1979}, | year = {1979}, |
institution = {NASA Lewis Research Center Cleveland, OH, United States}, | institution = {NASA Lewis Research Center Cleveland, OH, United States}, |
title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, |
* Picture : | * Picture : |
{{ :public:modeles:rotor_68:gene_aubes_nasa_image_rotor68.jpg?300 |}} | {{ :public:modeles:rotor_68:gene_aubes_nasa_image_rotor68.jpg?300 |}} |
<caption>Fig1. https://ntrs.nasa.gov/citations/19790018972 p.119 </caption> | <caption>Fig. 1 https://ntrs.nasa.gov/citations/19790018972 p.119 </caption> |
| |
<callout type="info" icon="true" title="Useful documents"> | <callout type="info" icon="true" title="Useful documents"> |
* [[https://gitlab.lava.polymtl.ca/depots_publics/modeles/catalogue_aubes/-/tree/master/rotor68|downloadable models]] (Git project) | * [[https://gitlab.lava.polymtl.ca/depots_publics/modeles/catalogue_aubes/-/tree/master/rotor68|downloadable models]] (Git project) |
* {{ :public:modeles:rotor_68:rotor68.pdf | NASA technical report}} (.pdf) | * {{ :public:modeles:rotor_68:rotor68.pdf | NASA technical report}} (.pdf) |
* {{ :public:modeles:rotor_68:rotor68_original.csv | geometrical parameters file}} (.csv), usable as input of OpenMCAD[(cite:Kojtych_2022_gene_aubes>Kojtych S., Batailly A. «OpenMCAD, an open blade generator: from Multiple-Circular-Arc profiles to Computer-Aided Design model» 2022. {{ https://hal.science/hal-03923093|code en libre accès}})] to generate reference blade models. | * {{ :public:modeles:rotor_68:rotor68_original.csv | geometrical parameters file}} (.csv), usable as input of OpenMCAD[(cite:Kojtych_2022_gene_aubes>Kojtych S., Batailly A. «OpenMCAD, an open blade generator: from Multiple-Circular-Arc profiles to Computer-Aided Design model» 2022. {{ https://hal.science/hal-03923093|open source code}})] to generate reference blade models. |
</callout> | </callout> |
| |
==== Aerodynamic design ==== | ==== Aerodynamic design ==== |
| |
^ ^ unit ^ values ^ | ^ ^ units ^ values ^ |
^ pressure ratio | [-] | 1.54 | | ^ pressure ratio | [-] | 1.54 | |
^ mass flow | [kg/s] | 33.248 | | ^ mass flow | [kg/s] | 33.248 | |
^ aspect ratio | [-] | 1.89 | | ^ aspect ratio | [-] | 1.89 | |
^ number of blades | [-] | 38 | | ^ number of blades | [-] | 38 | |
^ rotative speed | [rad/s] | 1680 | | ^ nominal rotation speed $\omega_n$ | [rad/s] | 1680 | |
| |
==== Material properties ==== | ==== Material properties ==== |
| |
The original material of the rotor 68 is not defined in the NASA report. | The original material of the rotor 68 is not defined in the NASA report. A generic titanium Ti-6Al-4V is considered: |
| |
Considered properties: Ti-6Al-4V, generic titanium : | ^ ^ units ^ values ^ |
| |
^ ^ unité ^ valeurs ^ | |
^ alloy | [-] | Ti-6Al-4V | | ^ alloy | [-] | Ti-6Al-4V | |
^ Young's modulus | [GPa] | 108 | | ^ Young's modulus | [GPa] | 108 | |
| |
^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ | ^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ |
| 1 | 1B | 2492.51 | 396.696 | | | 1 | 1B | 2492.51 | 396.70 | |
| 2 | 2B | 7697.97 | 1225.17 | | | 2 | 2B | 7697.97 | 1225.17 | |
| 3 | 1T | 10374.29 | 1651.12 | | | 3 | 1T | 10374.29 | 1651.12 | |
| |
| ====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:Kojtych_2022_gene_aubes)]: |
| |
| {{ :public:modeles:rotor_68:campbell_eng_68_ref.png?500 }} |
| <caption>Campbell diagram computed with a linear centrifugal preload, with clamped root (nominal rotation speed ωₙ = 1 680 rad/s)</caption> |
| |
| * {{ :public:modeles:rotor_68:campbell_eng_68_ref.pdf |graph (.pdf)}} |
| * {{ :public:modeles:rotor_68:campbell_68_ref.csv |Campbell data (.csv)}} |
| |
| |
| |
^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ | ^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ |
| 1 | 1B | 2450.71 | 390.043 | | | 1 | 1B | 2450.71 | 390.04 | |
| 2 | 2B | 7608.18 | 1210.88 | | | 2 | 2B | 7608.18 | 1210.88 | |
| 3 | 1T | 10308.76 | 1640.69 | | | 3 | 1T | 10308.76 | 1640.69 | |
| |
^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ | ^ Mode ^ Type ^ Natural angular frequency (rad/sec) ^ Natural frequency (Hz) ^ |
| 1 | 1B | 2450.84 | 390.064 | | | 1 | 1B | 2450.84 | 390.06 | |
| 2 | 2B | 7611.45 | 1211.4 | | | 2 | 2B | 7611.45 | 1211.40 | |
| 3 | 1T | 10314.29 | 1641.57 | | | 3 | 1T | 10314.29 | 1641.57 | |
| |
| |
| ====Campbell diagram==== |
| 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: |
| |
| {{ :public:modeles:rotor_68:campbell_eng_68_ini.png?500 }} |
| |
| |
| <caption>Campbell diagram computed with a linear centrifugal preload, with clamped root (nominal speed ωₙ = 1 680 rad/s), |
| |
| initial blade (orange), reference blade (gray) </caption> |
| |
| * {{ :public:modeles:rotor_68:campbell_eng_68_ini.pdf |graph (.pdf)}} |
| * {{ :public:modeles:rotor_68:campbell_68_ini.csv |Campbell data (.csv)}} |
| |
| |
* Rapport technique original [(cite:urasek1979design>Reid. «Performance of two-stage fan having low-aspect-ratio first-stage rotor blading » 1979. {{ https://ntrs.nasa.gov/citations/19780025165|pdf}})]: <code>@TechReport{urasek1979design, | * Rapport technique original [(cite:urasek1979design>Reid. «Performance of two-stage fan having low-aspect-ratio first-stage rotor blading » 1979. {{ https://ntrs.nasa.gov/citations/19780025165|pdf}})]: <code>@TechReport{urasek1979design, |
author = {Urasek, D. C. and Gorrell, W. T. and Cunnan, W. S.}, | author = {Urasek, D. C. and Gorrell, W. T. and Cunnan, W. S.}, |
date = {1979}, | year = {1979}, |
institution = {NASA Lewis Research Center Cleveland, OH, United States}, | institution = {NASA Lewis Research Center Cleveland, OH, United States}, |
title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, | title = {Performance of two-stage fan having low-aspect-ratio first-stage rotor blading}, |
* Photographie : | * Photographie : |
{{ :public:modeles:rotor_68:gene_aubes_nasa_image_rotor68.jpg?300 |}} | {{ :public:modeles:rotor_68:gene_aubes_nasa_image_rotor68.jpg?300 |}} |
<caption>Fig1. https://ntrs.nasa.gov/citations/19790018972 p.119 </caption> | <caption>Fig. 1 https://ntrs.nasa.gov/citations/19790018972 p.119 </caption> |
| |
<callout type="info" icon="true" title="Documents utiles"> | <callout type="info" icon="true" title="Documents utiles"> |
* [[https://gitlab.lava.polymtl.ca/depots_publics/modeles/catalogue_aubes/-/tree/master/rotor68|modèles téléchargeables]] (lien vers projet Git) | * [[https://gitlab.lava.polymtl.ca/depots_publics/modeles/catalogue_aubes/-/tree/master/rotor68|modèles téléchargeables]] (lien vers projet Git) |
* {{ :public:modeles:rotor_68:rotor68.pdf | rapport technique original}} de la NASA (.pdf) | * {{ :public:modeles:rotor_68:rotor68.pdf | rapport technique original}} de la NASA (.pdf) |
* {{ :public:modeles:rotor_68:rotor68_original.csv | fichier de paramètres géométriques}} (.csv), utilisable en entrée de OpenMCAD[(cite:Kojtych_2022_gene_aubes>Kojtych S., Batailly A. «OpenMCAD, an open blade generator: from Multiple-Circular-Arc profiles to Computer-Aided Design model» 2022. {{ https://hal.science/hal-03923093|code en libre accès}})] pour générer l'aube de référence | * {{ :public:modeles:rotor_68:rotor68_original.csv | fichier de paramètres géométriques}} (.csv), utilisable en entrée de OpenMCAD[(cite:Kojtych_2022_gene_aubes>)] pour générer l'aube de référence |
</callout> | </callout> |
| |
^ allongement | [-] | 1,89 | | ^ allongement | [-] | 1,89 | |
^ nombre d'aubes | [-] | 38 | | ^ nombre d'aubes | [-] | 38 | |
^ vitesse de rotation | [rad/s] | 1680 | | ^ vitesse de rotation nominale $\omega_n$| [rad/s] | 1680 | |
| |
==== Propriétés matériau ==== | ==== Propriétés matériau ==== |
| |
Le matériau original du rotor 68 n'est pas défini dans le rapport de la NASA. | Le matériau original du rotor 68 n'est pas défini dans le rapport de la NASA. Un alliage de titane Ti-6Al-4v est considéré : |
| |
Propriétés considérées : alliage de titane Ti-6Al-4v : | |
| |
^ ^ unité ^ valeurs ^ | ^ ^ unités ^ valeurs ^ |
^ alliage | [-] | Ti-6Al-4v | | ^ alliage | [-] | Ti-6Al-4v | |
^ module d'Young | [GPa] | 108 | | ^ module d'Young | [GPa] | 108 | |
| |
^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ | ^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ |
| 1 | 1B | 2492,51 | 396,696 | | | 1 | 1F | 2492,51 | 396,70 | |
| 2 | 2B | 7697,97 | 1225,17 | | | 2 | 2F | 7697,97 | 1225,17 | |
| 3 | 1T | 10374,29 | 1651,12 | | | 3 | 1T | 10374,29 | 1651,12 | |
| |
| ====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:Kojtych_2022_gene_aubes)]: |
| {{ :public:modeles:rotor_68:campbell_68_ref.png?500 }} |
| <caption>diagramme de Campbell calculé avec une précharge centrifuge linéaire, noeuds du pied d'aube encastrés (vitesse nominale ωₙ = 1 680 rad/s)</caption> |
| |
| * {{ :public:modeles:rotor_68:campbell_68_ref.pdf |graphique (.pdf)}} |
| * {{ :public:modeles:rotor_68:campbell_68_ref.csv |données du Campbell (.csv)}} |
| |
| |
| |
| |
===== Aube initiale ===== | ===== Aube initiale ===== |
| |
^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ | ^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ |
| 1 | 1B | 2450,71 | 390,043 | | | 1 | 1F | 2450,71 | 390,04 | |
| 2 | 2B | 7608,18 | 1210,88 | | | 2 | 2F | 7608,18 | 1210,88 | |
| 3 | 1T | 10308,76 | 1640,69 | | | 3 | 1T | 10308,76 | 1640,69 | |
| |
| |
| |
^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ | ^ Mode ^ Type ^ Pulsation propre (rad/sec) ^ Fréquence propre (Hz) ^ |
| 1 | 1B | 2450,84 | 390,064 | | | 1 | 1F | 2450,84 | 390,06 | |
| 2 | 2B | 7611,45 | 1211,4 | | | 2 | 2F | 7611,45 | 1211,40 | |
| 3 | 1T | 10314,29 | 1641,57 | | | 3 | 1T | 10314,29 | 1641,57 | |
| |
| ====Diagramme de Campbell==== |
| Comparaison de l'évolution des fréquences propres des 3 premiers modes, en fonction de la vitesse de rotation, pour l'aube initiale et de référence: |
| |
| {{ :public:modeles:rotor_68:campbell_68_ini.png?500 }} |
| <caption>diagramme de Campbell calculé avec une précharge centrifuge linéaire, noeuds du pied d'aube encastrés (vitesse nominale ωₙ = 1 680 rad/s), |
| |
| aube initiale (orange), aube de référence (grise)</caption> |
| |
| * {{ :public:modeles:rotor_68:campbell_68_ini.pdf |graphique (.pdf)}} |
| * {{ :public:modeles:rotor_68:campbell_68_ini.csv |données du Campbell (.csv)}} |
</pane> | </pane> |
| |
</tabs> | </tabs> |
| |