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Characterization of liquefaction susceptibility of sands by means of extreme void ratios and/or void ratio range / Y. Yilmaz in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 12 (Décembre 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 12 (Décembre 2009) . - pp. 1986–1990 Titre : Characterization of liquefaction susceptibility of sands by means of extreme void ratios and/or void ratio range Type de document : texte imprimé Auteurs : Y. Yilmaz, Auteur ; M. Mollamahmutoglu, Auteur Année de publication : 2010 Article en page(s) : pp. 1986–1990 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : SandSoil  typeSoil  liquefactionVoidsCyclic  testsGrain  size Résumé : The liquefaction susceptibility of various graded fine to medium saturated sands are evaluated by stress controlled cyclic triaxial laboratory tests. Cyclic triaxial tests are performed on reconstituted specimens having global relative density of 60%. In all cyclic triaxial tests, loading pattern is selected as a sinusoidal wave form with 1.0 Hz frequency and effective consolidation pressure is chosen as 100 kPa. Liquefaction resistance is defined as the required cyclic stress ratio causing initial liquefaction in 10 cycles during the cyclic triaxial test. The results are used to draw conclusions on the effect of the extreme void ratios and void ratio range on the liquefaction resistance of various graded sands. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000164 [article] Characterization of liquefaction susceptibility of sands by means of extreme void ratios and/or void ratio range [texte imprimé] / Y. Yilmaz, Auteur ; M. Mollamahmutoglu, Auteur . - 2010 . - pp. 1986–1990. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 12 (Décembre 2009) . - pp. 1986–1990 Mots-clés : SandSoil  typeSoil  liquefactionVoidsCyclic  testsGrain  size Résumé : The liquefaction susceptibility of various graded fine to medium saturated sands are evaluated by stress controlled cyclic triaxial laboratory tests. Cyclic triaxial tests are performed on reconstituted specimens having global relative density of 60%. In all cyclic triaxial tests, loading pattern is selected as a sinusoidal wave form with 1.0 Hz frequency and effective consolidation pressure is chosen as 100 kPa. Liquefaction resistance is defined as the required cyclic stress ratio causing initial liquefaction in 10 cycles during the cyclic triaxial test. The results are used to draw conclusions on the effect of the extreme void ratios and void ratio range on the liquefaction resistance of various graded sands. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000164

Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis / K. Dincer in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1117-1124 Titre : Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis Titre original : Etude expérimentale sur la performance d'un tube vortex de type Ranque-Hilsch en cascade chaud et analyse de l'exergie Type de document : texte imprimé Auteurs : K. Dincer, Auteur ; Y. Yilmaz, Auteur ; A. Berber, Auteur Année de publication : 2011 Article en page(s) : pp. 1117-1124 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Ranque-Hilsch  Vortex  tube  Experiment  Exergy  Efficiency  geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this study, three Ranque–Hilsch vortex tubes were used, which have 9 mm inside diameter and length/diameter ratio was 15. Their performances were examined as one of the classical RHVT and other was hot cascade type RHVT. Performance analysis was according to temperature difference between the hot outlet and the inlet (ΔThot.). The ΔThot values of hot cascade type Ranque–Hilsch vortex tubes were greater than the ΔThot values of classical RHVT, which were determined experimentally. The total inlet exergy, total outlet exergy, total lost exergy and exergy efficiency of hot stream were investigated by using experimental data. In both the classical RHVT and hot cascade type RHVT, it was found that as fraction of cold flow increases the total lost exergy decreases. It was also found that, the hot cascade type RHVT more exergy efficiency of hot outlet than the classical RHVT. Excess ΔThot value of hot cascade type Ranque–Hilsch vortex tube causes the excess exergy efficiency of hot outlet. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000326 [article] Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis = Etude expérimentale sur la performance d'un tube vortex de type Ranque-Hilsch en cascade chaud et analyse de l'exergie [texte imprimé] / K. Dincer, Auteur ; Y. Yilmaz, Auteur ; A. Berber, Auteur . - 2011 . - pp. 1117-1124. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1117-1124 Mots-clés : Ranque-Hilsch  Vortex  tube  Experiment  Exergy  Efficiency  geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this study, three Ranque–Hilsch vortex tubes were used, which have 9 mm inside diameter and length/diameter ratio was 15. Their performances were examined as one of the classical RHVT and other was hot cascade type RHVT. Performance analysis was according to temperature difference between the hot outlet and the inlet (ΔThot.). The ΔThot values of hot cascade type Ranque–Hilsch vortex tubes were greater than the ΔThot values of classical RHVT, which were determined experimentally. The total inlet exergy, total outlet exergy, total lost exergy and exergy efficiency of hot stream were investigated by using experimental data. In both the classical RHVT and hot cascade type RHVT, it was found that as fraction of cold flow increases the total lost exergy decreases. It was also found that, the hot cascade type RHVT more exergy efficiency of hot outlet than the classical RHVT. Excess ΔThot value of hot cascade type Ranque–Hilsch vortex tube causes the excess exergy efficiency of hot outlet. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000326