The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform

Yan Zhao - One of the best experts on this subject based on the ideXlab platform.

  • numerical simulation study on high temperature ventilated cavitating flow considering the Compressibility of Gases
    Advanced Materials Research, 2012
    Co-Authors: Jing Zhao, Guo Yu Wang, Yan Zhao
    Abstract:

    A numerical simulation approach of ventilated cavity considering the Compressibility of Gases is established in this paper, introducing the gas state equation into the calculation of ventilated supercavitating flow. Based on the comparison of computing results and experimental data, we analyzes the differences between ventilated cavitating flow fields with and without considered the Compressibility of Gases. The effect of ventilation on the ventilated supercavitating flow field structure is discussed considering the Compressibility of Gases. The results show that the simulation data of cavity form and resistance, which takes the Compressibility of Gases into account, accord well with the experimental ones. With the raising of ventilation temperature, the gas fraction in the front cavity and the gas velocity in the cavity increase, and the cavity becomes flat. The resistance becomes lower at high ventilation temperature, but its fluctuation range becomes larger than that at low temperature.

Jing Zhao - One of the best experts on this subject based on the ideXlab platform.

  • numerical simulation study on high temperature ventilated cavitating flow considering the Compressibility of Gases
    Advanced Materials Research, 2012
    Co-Authors: Jing Zhao, Guo Yu Wang, Yan Zhao
    Abstract:

    A numerical simulation approach of ventilated cavity considering the Compressibility of Gases is established in this paper, introducing the gas state equation into the calculation of ventilated supercavitating flow. Based on the comparison of computing results and experimental data, we analyzes the differences between ventilated cavitating flow fields with and without considered the Compressibility of Gases. The effect of ventilation on the ventilated supercavitating flow field structure is discussed considering the Compressibility of Gases. The results show that the simulation data of cavity form and resistance, which takes the Compressibility of Gases into account, accord well with the experimental ones. With the raising of ventilation temperature, the gas fraction in the front cavity and the gas velocity in the cavity increase, and the cavity becomes flat. The resistance becomes lower at high ventilation temperature, but its fluctuation range becomes larger than that at low temperature.

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

  • numerical simulation study on high temperature ventilated cavitating flow considering the Compressibility of Gases
    Advanced Materials Research, 2012
    Co-Authors: Jing Zhao, Guo Yu Wang, Yan Zhao
    Abstract:

    A numerical simulation approach of ventilated cavity considering the Compressibility of Gases is established in this paper, introducing the gas state equation into the calculation of ventilated supercavitating flow. Based on the comparison of computing results and experimental data, we analyzes the differences between ventilated cavitating flow fields with and without considered the Compressibility of Gases. The effect of ventilation on the ventilated supercavitating flow field structure is discussed considering the Compressibility of Gases. The results show that the simulation data of cavity form and resistance, which takes the Compressibility of Gases into account, accord well with the experimental ones. With the raising of ventilation temperature, the gas fraction in the front cavity and the gas velocity in the cavity increase, and the cavity becomes flat. The resistance becomes lower at high ventilation temperature, but its fluctuation range becomes larger than that at low temperature.

Jiang Yuan-yong - One of the best experts on this subject based on the ideXlab platform.

  • Study on the motion of compressible fluid and multi-phase gas-solid reaction in a packed channel
    Journal of Hydrodynamics, 2020
    Co-Authors: Song Ying-tao, Xu Zeng-he, Jiang Yuan-yong
    Abstract:

    Considering the Compressibility of gas, the non-homoeneous velocity field of gas in a packed channel can be obtained from the fluid dynamics in porous media. Then multi-phase gas-solid reaction and mass transport are studied. The comparison with the convection, reaction and diffusion of incompressible fluid motion in a packed channel shows that, even though the difference of pressure fields induced by the different Compressibility of Gases is small, the difference of velocity fields is larger. Because minor difference of convection velocity can yield big difference of Peclet number, it induces great difference of the concentration of gas components. For the concentration of gas components, the convection velocity at the inlet of reactor, and the additional convection velocity taking place within reactor due to the gas expanding have different effect, the former raises the concentration of gas components and the latter reduces it. The convective flow has different impact on the mass transfer of reactive gas and gas product. But this is only the difference of apparent phenomena, behind the apparent phenomena the intrinsic nature of convective flow is the same. The less is the radius of pellet, the less is the rationality that Mach number is taken as the criterion to identify the Compressibility of gas. So, it should be relative pressure drop rather than Mach number that is taken as the criterion to identify if the Compressibility of gas can be ignored.

Song Ying-tao - One of the best experts on this subject based on the ideXlab platform.

  • Study on the motion of compressible fluid and multi-phase gas-solid reaction in a packed channel
    Journal of Hydrodynamics, 2020
    Co-Authors: Song Ying-tao, Xu Zeng-he, Jiang Yuan-yong
    Abstract:

    Considering the Compressibility of gas, the non-homoeneous velocity field of gas in a packed channel can be obtained from the fluid dynamics in porous media. Then multi-phase gas-solid reaction and mass transport are studied. The comparison with the convection, reaction and diffusion of incompressible fluid motion in a packed channel shows that, even though the difference of pressure fields induced by the different Compressibility of Gases is small, the difference of velocity fields is larger. Because minor difference of convection velocity can yield big difference of Peclet number, it induces great difference of the concentration of gas components. For the concentration of gas components, the convection velocity at the inlet of reactor, and the additional convection velocity taking place within reactor due to the gas expanding have different effect, the former raises the concentration of gas components and the latter reduces it. The convective flow has different impact on the mass transfer of reactive gas and gas product. But this is only the difference of apparent phenomena, behind the apparent phenomena the intrinsic nature of convective flow is the same. The less is the radius of pellet, the less is the rationality that Mach number is taken as the criterion to identify the Compressibility of gas. So, it should be relative pressure drop rather than Mach number that is taken as the criterion to identify if the Compressibility of gas can be ignored.