The Experts below are selected from a list of 23169 Experts worldwide ranked by ideXlab platform

Venkata B Narayana - One of the best experts on this subject based on the ideXlab platform.

  • design and performance analysis of Centrifugal Pump
    International Journal of Research, 2016
    Co-Authors: R Narsimha, Venkata B Narayana
    Abstract:

    This paper deals with the design and performance analysis of Centrifugal Pump. In this paper, Centrifugal Pump is analyzed by using a single-stage end suction Centrifugal Pump. Two main components of a Centrifugal Pump are the impeller and the casing. The impeller is a rotating component and the casing is a stationary component. In Centrifugal Pump, water enters axially through the impeller eyes and water exits radially. The Pump casing is to guide the liquid to the impeller, converts into pressure the high velocity kinetic energy of the flow from the impeller discharge and leads liquid away of the energy having imparted to the liquid comes from the volute casing. A design of Centrifugal Pump is carried out and analyzed to get the best performance point. The design and performance analysis of Centrifugal Pump are chosen because it is the most useful mechanical rotodynamic machine in fluid works which widely used in domestic, irrigation, industry, large plants and river water Pumping system. Moreover, Centrifugal Pumps are produced by manufacturing processes in Myanmar

Yuchuan Wang - One of the best experts on this subject based on the ideXlab platform.

  • influence of prewhirl regulation by inlet guide vanes on cavitation performance of a Centrifugal Pump
    Energies, 2014
    Co-Authors: Yuchuan Wang, Binbin Wang
    Abstract:

    The influence of prewhirl regulation by inlet guide vanes (IGVs) on a Centrifugal Pump performance is investigated experimentally and numerically. The experimental results show that IGVs can obviously change the head and increase the efficiency of the tested Centrifugal Pump over a wide range of flow rates. Although the cavitation performance is degraded, the variation of the cavitation critical point is less than 0.5 m. Movement of the computed three-dimensional streamlines in suction pipe and impeller are analyzed in order to reveal the mechanism how the IGVs realize the prewhirl regulation. The calculated results show that the influence of IGVs on the cavitation performance of Centrifugal Pump is limited by a maximum total pressure drop of 1777 Pa, about 7.6% of the total pressure at the suction pipe inlet for a prewhirl angle of 24°.

  • Numerical prediction of performance drop due to cavitation in a Centrifugal Pump
    2014 ISFMFE - 6th International Symposium on Fluid Machinery and Fluid Engineering, 2014
    Co-Authors: Genqiqige Meng, Shuliang Cao, Lei Tan, Yun Xu, Yuchuan Wang, Wanshi Qu
    Abstract:

    In order to predict cavitation performance drop of the Centrifugal Pump, the RNG κ-ε turbulence model and the mass transport cavitation model are applied to simulate the cavitation flows in a Centrifugal Pump at different flow rates. The influence of condensation coefficient of the mass transport cavitation model on numerical simulation is analysed. According to the calculation result, the value of condensation coefficient is modified. The calculated variation of Pump head and efficiency at different flow rate agrees well with the experimental data. The results demonstrate that the numerical model and method can accurately predict the cavitation flows in a Centrifugal Pump. The cavitation flow fields in the Centrifugal Pump are revealed. The results show that the cavity bubbles firstly appear in the blade suction side and then develop to the middle of blade-to-blade channel. When the cavitation bubbles increase and then block the normal flow in the impeller, the Pump head gradually drops. The detailed evolutions of cavitation structure in the Centrifugal Pump impeller are presented to provide beneficial references to the Centrifugal Pump optimization design.

Zhong Li - One of the best experts on this subject based on the ideXlab platform.

  • Vibration characteristics induced by cavitation in a Centrifugal Pump with slope volute
    Shock and Vibration, 2015
    Co-Authors: Ning Zhang, Minguan Yang, Bo Gao, Zhong Li
    Abstract:

    Cavitation is one of the instability sources in Centrifugal Pump, which would cause some unexpected results. The goal of this paper was to analyze the influence of cavitation process on different frequency bands in a Centrifugal Pump with slope volute. And special attention was paid to low frequency signals, which were often filtered in the reported researches. Results show that at noncavitation condition, vibration level is closely related to flow structure interior Pump. At partial flow rates, especially low flow rates, vibration level increases rapidly with the onset of rotating stall. At cavitation condition, it is proved that cavitation process has a significant impact on low frequency signals. With cavitation number decreasing, vibration level first rises to a local maximum, then it drops to a local minimum, and finally it rises again. At different flow rates, vibration trends in variable frequency bands differ obviously. Critical point inferred from vibration level is much larger than that from 3% head drop, which indicates that cavitation occurs much earlier than that reflected in head curve. Also, it is noted that high frequency signals almost increase simultaneously with cavitation occurring, which can be used to detect cavitation in Centrifugal Pump.

  • Investigation on Vibration Characteristics in a Centrifugal Pump with Special Slope Volute
    Advances in Mechanical Engineering, 2015
    Co-Authors: Ning Zhang, Minguan Yang, Bo Gao, Zhong Li
    Abstract:

    Cavitation is one of the instability sources in Centrifugal Pump, which would cause some unexpected results. The goal of this paper was to analyze the influence of cavitation process on different frequency bands in a Centrifugal Pump with slope volute. And special attention was paid to low frequency signals, which were often filtered in the reported researches. Results show that at noncavitation condition, vibration level is closely related to flow structure interior Pump. At partial flow rates, especially low flow rates, vibration level increases rapidly with the onset of rotating stall. At cavitation condition, it is proved that cavitation process has a significant impact on low frequency signals. With cavitation number decreasing, vibration level first rises to a local maximum, then it drops to a local minimum, and finally it rises again. At different flow rates, vibration trends in variable frequency bands differ obviously. Critical point inferred from vibration level is much larger than that from 3% head drop, which indicates that cavitation occurs much earlier than that reflected in head curve. Also, it is noted that high frequency signals almost increase simultaneously with cavitation occurring, which can be used to detect cavitation in Centrifugal Pump.

Binbin Wang - One of the best experts on this subject based on the ideXlab platform.

  • influence of prewhirl regulation by inlet guide vanes on cavitation performance of a Centrifugal Pump
    Energies, 2014
    Co-Authors: Yuchuan Wang, Binbin Wang
    Abstract:

    The influence of prewhirl regulation by inlet guide vanes (IGVs) on a Centrifugal Pump performance is investigated experimentally and numerically. The experimental results show that IGVs can obviously change the head and increase the efficiency of the tested Centrifugal Pump over a wide range of flow rates. Although the cavitation performance is degraded, the variation of the cavitation critical point is less than 0.5 m. Movement of the computed three-dimensional streamlines in suction pipe and impeller are analyzed in order to reveal the mechanism how the IGVs realize the prewhirl regulation. The calculated results show that the influence of IGVs on the cavitation performance of Centrifugal Pump is limited by a maximum total pressure drop of 1777 Pa, about 7.6% of the total pressure at the suction pipe inlet for a prewhirl angle of 24°.

R Narsimha - One of the best experts on this subject based on the ideXlab platform.

  • design and performance analysis of Centrifugal Pump
    International Journal of Research, 2016
    Co-Authors: R Narsimha, Venkata B Narayana
    Abstract:

    This paper deals with the design and performance analysis of Centrifugal Pump. In this paper, Centrifugal Pump is analyzed by using a single-stage end suction Centrifugal Pump. Two main components of a Centrifugal Pump are the impeller and the casing. The impeller is a rotating component and the casing is a stationary component. In Centrifugal Pump, water enters axially through the impeller eyes and water exits radially. The Pump casing is to guide the liquid to the impeller, converts into pressure the high velocity kinetic energy of the flow from the impeller discharge and leads liquid away of the energy having imparted to the liquid comes from the volute casing. A design of Centrifugal Pump is carried out and analyzed to get the best performance point. The design and performance analysis of Centrifugal Pump are chosen because it is the most useful mechanical rotodynamic machine in fluid works which widely used in domestic, irrigation, industry, large plants and river water Pumping system. Moreover, Centrifugal Pumps are produced by manufacturing processes in Myanmar