Documents disponibles écrits par cet auteur

Head curve of noncavitating inducer / Wen-Guang, Li in Transactions of the ASME . Journal of fluids engineering, Vol. 133 N° 2 (Fevrier 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 2 (Fevrier 2011) . - 08 p. Titre : Head curve of noncavitating inducer Type de document : texte imprimé Auteurs : Wen-Guang, Li, Auteur Année de publication : 2011 Article en page(s) : 08 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Inducer  Noncavitating  head  Head  curve  Singularity  method  Hydraulic  loss Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In the inducer hydraulic design, one significantly important task is to estimate its noncavtating head; however, there is not a matured and reliable method for this presently. In this paper, a method was made for predicting the inducer head curve. The method was based on a singularity method and a hydraulic loss model with a variable correction factor. The blade thickness blockage effect on the flow was taken into account. The method was validated with the experimental data of the existing 17 inducers found in references. Moreover, the curves showing the relation of the correction factor with the mean blade angle at tip for two- and three-bladed inducers were established. The method can achieve a very good agreement with experimental observations. Furthermore, the flow field calculated by the method may be instructive to the engineers of inducer hydraulic design. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...] [article] Head curve of noncavitating inducer [texte imprimé] / Wen-Guang, Li, Auteur . - 2011 . - 08 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 2 (Fevrier 2011) . - 08 p. Mots-clés : Inducer  Noncavitating  head  Head  curve  Singularity  method  Hydraulic  loss Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In the inducer hydraulic design, one significantly important task is to estimate its noncavtating head; however, there is not a matured and reliable method for this presently. In this paper, a method was made for predicting the inducer head curve. The method was based on a singularity method and a hydraulic loss model with a variable correction factor. The blade thickness blockage effect on the flow was taken into account. The method was validated with the experimental data of the existing 17 inducers found in references. Moreover, the curves showing the relation of the correction factor with the mean blade angle at tip for two- and three-bladed inducers were established. The method can achieve a very good agreement with experimental observations. Furthermore, the flow field calculated by the method may be instructive to the engineers of inducer hydraulic design. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...]

NPSHr optimization of axial-flow pumps / Wen-Guang, Li in Transactions of the ASME . Journal of fluids engineering, Vol. 130 N° 7 (Juillet 2008) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 7 (Juillet 2008) . - 4 p. Titre : NPSHr optimization of axial-flow pumps Type de document : texte imprimé Auteurs : Wen-Guang, Li, Auteur Année de publication : 2014 Article en page(s) : 4 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Impellers;  optimization;  pumps;  axial  flow;  blades;  flow  (dynamics);  cavitation;  suction;  equations;  thickness;  geometry;  design;  vortices;  equilibrium  (physics);  actuators;  disks Résumé : The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller diameter based on experimental data of 2D cascades in available wind tunnels. Then, it is optimized again with the velocity moment at the impeller outlet, which is expressed in terms of two parameters. The blade geometry is generated and flow details are clarified by using the radial equilibrium equation, actuator disk theory, and 2D vortex element method in the optimizing process. The NPSHr response surface has been established in terms of these two parameters. The results illustrate that the second optimization allows NPSHr to be reduced by 37.5% compared to the first optimization. Therefore, this two-step method is effective and expects to be applied in the axial-flow pump impeller blade design. The simulations of 3D turbulent flow with various cavitation models and related confirming experiments are going to be done in the axial-flow impellers designed with this method. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27324 [...] [article] NPSHr optimization of axial-flow pumps [texte imprimé] / Wen-Guang, Li, Auteur . - 2014 . - 4 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 7 (Juillet 2008) . - 4 p. Mots-clés : Impellers;  optimization;  pumps;  axial  flow;  blades;  flow  (dynamics);  cavitation;  suction;  equations;  thickness;  geometry;  design;  vortices;  equilibrium  (physics);  actuators;  disks Résumé : The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller diameter based on experimental data of 2D cascades in available wind tunnels. Then, it is optimized again with the velocity moment at the impeller outlet, which is expressed in terms of two parameters. The blade geometry is generated and flow details are clarified by using the radial equilibrium equation, actuator disk theory, and 2D vortex element method in the optimizing process. The NPSHr response surface has been established in terms of these two parameters. The results illustrate that the second optimization allows NPSHr to be reduced by 37.5% compared to the first optimization. Therefore, this two-step method is effective and expects to be applied in the axial-flow pump impeller blade design. The simulations of 3D turbulent flow with various cavitation models and related confirming experiments are going to be done in the axial-flow impellers designed with this method. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27324 [...]