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Low specific speed centrifugal double suction impeller flow field numerical calculation and analysis

Author: ZhangJiaHui
Tutor: LiuYi
School: Lanzhou University of Technology
Course: Fluid Machinery and Engineering
Keywords: Double- suction centrifugal pump Impeller Pressure Speed Numerical
CLC: TH311
Type: Master's thesis
Year: 2005
Downloads: 219
Quote: 9
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Abstract


The use of CFD technology of the fluid in the flow field numerical simulation of the movement of research has become an important method of centrifugal pumps , but so far mostly for single suction and single channel carried . Low specific speed petrochemical process pump is the petrochemical and refinery processes commonly used product, but its disk friction losses and low efficiency , shaft power increases sharply with the flow , lift curve prone to hump other shortcomings have long been each plagued manufacturers and users , limiting the rapid development of the national economy . This topic using FLUENT6.0 software, using the standard k-ε turbulence model and proposed by the Patankar and Spalding SIMPLE algorithm , the HD type low specific speed petrochemical process pump double suction impeller flow field numerical simulation gives the pressure and velocity distribution , reveals the main features of its internal flow for centrifugal double suction impeller design provides an important theoretical basis . The results plotted by a characteristic curve of pump head , compared with the experimental values ??, to guide the engineering practice purposes. One of the pump performance curve prediction , reducing the pump model making , prototype, test costs , shorten the design and manufacturing cycle, there is a certain theoretical and practical value. In the past the process pump double suction impeller flow field numerical simulation is to select a single channel multi- conducted , which features double suction is still a great difference. In this thesis, strict compliance with the solid model to model, the boundary conditions are set boundary conditions on the use of export quality and gives the application conditions , relative to the other outlet boundary condition settings ( such as speed and pressure outlet , must be accurate calculation or experimental determination of the boundary conditions are set to bring a degree of difficulty ) , the quality of its simple and effective outlet boundary conditions of the flow field simulation study is simplified.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Pump > Vane pump > Centrifugal pump
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