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Search Results (15)
  • Open Access

    ARTICLE

    NUMERICAL ANALYSIS OF A PROTOTYPE PUMP AS TURBINE AT DIFFERENT WORKING CONDITIONS

    Xiao Suna, Fan-Kang Zenga, Jia-Bing Yanga, Feng-Lin Zhoua, Yu-Liang Zhangb,*

    Frontiers in Heat and Mass Transfer, Vol.17, pp. 1-6, 2021, DOI:10.5098/hmt.17.5

    Abstract In order to better study the internal flow characteristics of centrifugal pump as turbine, CFX software is employed to carry out numerical simulation to obtain flow field under different working conditions for pump as turbine based on the standard k - epsilon turbulence model and the SIMPLEC algorithm. The efficiency curves of the pump and pump as turbine are obtained under different working conditions. The results show that the effciency characteristics of the pump change greatly during the process of pumping. The efficiency of the turbine is higher than that of the pump under the respective More >

  • Open Access

    ARTICLE

    A CFD Study on a Biomimetic Flexible Two-body System

    Jianxin Hu, Xin Huang, Yuzhen Jin*

    FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.3, pp. 597-614, 2021, DOI:10.32604/fdmp.2021.014249 - 29 April 2021

    Abstract By studying the characteristics of the flow field around a swimming fish, useful insights can be obtained into the superior swimming capabilities developed by nature over millions of years, in comparison to what can be achieved using the standard engineering principles traditionally employed in naval and ocean engineering. In the present study, the flow field related to a single joint fish model is simulated in the framework of a commercial computational fluid dynamics software (ANSYS Fluent 18.0). The principle of the anti-Kármán vortex street is analyzed and the relationship between the direction of the tail More >

  • Open Access

    ABSTRACT

    Study on the Influence of Right Atrial Pressure on the Numerical Calculation of Fractional Flow Reserve

    Yue Feng1, Youjun Liu1,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 31-32, 2019, DOI:10.32604/mcb.2019.05713

    Abstract Coronary atherosclerotic heart disease, or coronary heart disease for short, is a heart disease caused by atherosclerotic lesions of coronary arteries, resulting in stenosis, spasm and live obstruction, leading to myocardial ischemia, hypoxia and even necrosis, and is the most common type of organ lesions caused by atherosclerosis. Coronary computed tomograph angiography (CCTA) has been the most effective method for examining coronary heart disease, but this method can only be judged from the morphology. It has been shown that when the coronary stenosis rate is as high as 70%, only 32% of blood vessels can… More >

  • Open Access

    ARTICLE

    Optimization of a Centrifugal Pump Used as a Turbine Impeller By Means of an Orthogonal Test Approach

    Peng Tian1, Jun Huang1, Weidong Shi1,2,*, Ling Zhou1

    FDMP-Fluid Dynamics & Materials Processing, Vol.15, No.2, pp. 139-151, 2019, DOI:10.32604/fdmp.2019.05216

    Abstract A prototype centrifugal pump with a specific speed of 110 is used to investigate and optimize the performances of a turbine for power generation. Particular attention is given to the design of the internal impeller. The internal flow field is simulated in the framework of a commercial computational fluid dynamics software (ANSYS). Four geometrical parameters of the impeller are considered, i.e., the inlet diameter, the inlet width, the blade number, and the blade angle. The optimization is carried out on the basis of a three-level approach relying on an orthogonal test method. The results of More >

  • Open Access

    ARTICLE

    Numerical Evalution of Eshelby’s Tensor of Anisotropic Ferromagnetic Shape Memory Alloy and Its Influence on Magnetic Field-induced Strain

    Yuping Zhu1,2, Tao Shi1, Yuanbing Wang1

    CMES-Computer Modeling in Engineering & Sciences, Vol.95, No.6, pp. 501-517, 2013, DOI:10.3970/cmes.2013.095.501

    Abstract Single crystal ferromagnetic shape memory alloy is a kind of new intelligent materials, it shows obvious anisotropy. Micromechanics theory has been used to analyze the whole mechanical behaviors of this material. However, Eshelby’s tensor of this material which plays an important role has still not solved efficiently. Based on the existing micromechanics constitutive model, this paper analyzes the numerical calculation formula of Eshelby’s tensor of anisotropic ferromagnetic shape memory alloy. Adopting the way of Gauss integral, the optimal Gaussian integral points for different inclusion shapes and the corresponding numerical solution of Eshelby’s tensor are obtained.Furthermore, More >

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