مورد إلكتروني
Analysis of the suction chamber of external gear pumps and their influence on cavitation and volumetric efficiency
| العنوان: | Analysis of the suction chamber of external gear pumps and their influence on cavitation and volumetric efficiency |
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| المصدر: | TDX (Tesis Doctorals en Xarxa) |
| بيانات النشر: | Universitat Politècnica de Catalunya 2012-04-27 |
| تفاصيل مُضافة: | Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids Codina Macià, Esteban Castilla López, Roberto Campo Sud, David del |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Hydraulic machines are faced with increasingly severe performance requirements. The need to design smaller and more powerful machines rotating at higher speeds in order to provide increasing efficiencies, has to face a major limitation: cavitation. A two-dimensional numerical approach, by means of Computational Fluid Dynamics (CFD), has been developed for studying the effect of cavitation in the volumetric efficiency of external gear pumps. Several cavitation models and grid deformation algorithms have been studied, and a method for simulating the contact between solid boundaries has been developed. The velocity field in the inlet chamber has also been experimentally measured by means of Time-Resolved Particle Image Velocimetry (TRPIV) and results have been compared to the numerical ones in order to validate the accuracy of the model. Our two-dimensional model is not able to predict the real volumetric efficiency of the pump, since several simplifications are involved in it. Nevertheless, this model shows to be valid to understand the complex flow patterns that take place inside the pump and to study the influence of cavitation on volumetric efficiency. The influence of the rotational speed of the pump has been analyzed, as well as the effect of the geometry of the inlet chamber, the working pressure, the inlet pressure loss factor, and the flow leakage through the radial clearances of the pump between gears and casing. Postprint (published version) |
| مصطلحات الفهرس: | Àrees temàtiques de la UPC::Enginyeria mecànica, Bombas de engranajes, Cavitación, CFD, Rendimiento volumétrico, Mecánica de fluidos, Computacional, PIV, Doctoral thesis |
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| الإتاحة: | Open access content. Open access content L'accés als continguts d'aquesta tesi queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by-nc-sa/3.0/es http://creativecommons.org/licenses/by-nc-sa/3.0/es Open Access |
| ملاحظة: | 223 p. application/pdf English |
| أرقام أخرى: | HGF oai:upcommons.upc.edu:2117/94595 Campo Sud, D. del. Analysis of the suction chamber of external gear pumps and their influence on cavitation and volumetric efficiency. Tesi doctoral, UPC, Departament de Mecànica de Fluids, 2012. B. 20044-2012 969839194 |
| المصدر المساهم: | UNIV POLITECNICA DE CATALUNYA From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.ocn969839194 |
| قاعدة البيانات: | OAIster |
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