The Experts below are selected from a list of 16398 Experts worldwide ranked by ideXlab platform

Jingyu Xu - One of the best experts on this subject based on the ideXlab platform.

  • separation characteristics of the gas and liquid phases in a vane type Swirling Flow field
    International Journal of Multiphase Flow, 2018
    Co-Authors: Lele Yang, Dong Zhang, Jingyu Xu
    Abstract:

    Abstract In order to investigate inlet bubble size distribution, gas phase concentration, and Swirling intensity in the Swirling Flow field of a vane-type separator, both Flow loop experiments and numerical studies have been conducted in this work. The bubble size distributions and fractions of local voids were determined using a Malvern RTsizer and electrical resistance tomography, respectively, while the numerical simulations were conducted by coupling the RNG k-e turbulent and mixture multiphase models. As a result, a suitable model for predicting the bubble size distribution parameters d32 and dmax was developed. In addition, the effects of inlet mixture Flow rate, inlet void fraction, and liquid viscosity on the core size of the gas phase in the Swirling Flow field were determined, and the impact of the gas phase on Swirling intensity was characterized using the Swirling number. The obtained results can be used in designing vane-type separators for the crude oil extraction industry.

  • breakup and coalescence regularity of non dilute oil drops in a vane type Swirling Flow field
    Chemical Engineering Research & Design, 2018
    Co-Authors: Dong Zhang, Lele Yang, Jingyu Xu
    Abstract:

    Abstract In this work, in order to investigate the behavior of non-dilute drops, including breakup, coalescence and trajectory, in a 100-mm inner-diameter horizontal Swirling Flow field with low inlet mixture velocity, both an experimental study and numerical simulation were conducted. Inlet oil phase concentration was under 3.0% volume fraction, with an inlet Flow rate ranging from 12 m3/h to 18 m3/h. Malvern RTsizer and Electrical Resistance Tomography were applied for measuring the drop size distribution and oil phase concentration, respectively. Correspondingly, numerical simulations applying a Renormalization-group k-e turbulent model, coupled with a Discrete Phase Model simulating oil phase, were conducted as well. The results showed that small drops in the Flow field tended to coalescence, while the behavior of large drops was determined by the inlet Flow rate. A higher inlet Flow rate led to a thinner oil core with constant inlet oil concentration. Moreover, the simulation results, which corresponded well with the experimental observations, presented oil drops distribution laws of breakup, coalescence and trajectory in a 100-mm inner diameter Swirling Flow field and established a prediction model in a similar Flow field. Finally, regularity of Swirling intense distribution and drop-turbulence interaction in a Swirling Flow field with a low inlet velocity was established. These results provide new information helpful for the design of vane-type separator.

Toshihiro Tanaka - One of the best experts on this subject based on the ideXlab platform.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Isij International, 2010
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We began development of Swirling-Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling the Flow pattern in continuous casting molds. As a first step, we developed a Swirling-Flow submerged entry nozzle for round billet casting at the Wakayama works. We then began developing Swirling-Flow submerged entry nozzles for slab casting. The main purpose of the present work was to demonstrate that the formation of Swirling Flow in submerged entry nozzle improves productivity and the quality of products in continuous casting. We examined Swirling-Flow submerged entry nozzles with a swirl blade in these main bodies because such an arrangement is the easiest way to apply Swirling Flow to submerged entry nozzles in continuous casters without investment by facilities. We had only to change the submerged entry nozzle in the experiment. Swirling-Flow submerged entry nozzles for slab casting were developed and their operation examined at the Wakayama and Kashima works. It was found that the proposed submerged entry nozzles increased the casting speed and improved the surface quality of slabs and steel sheets.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Tetsu To Hagane-journal of The Iron and Steel Institute of Japan, 2009
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We have started a development of Swirling Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling Flow pattern in continuous casting molds. As a first step, we h ...

Katsukiyo Marukawa - One of the best experts on this subject based on the ideXlab platform.

  • Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting
    Acta Metallurgica Sinica (English Letters), 2018
    Co-Authors: Xiao-wei Zhu, Chun Lei Wu, Katsukiyo Marukawa, De-wei Li, Qiang Wang
    Abstract:

    During the slab continuous casting process, the Flow field of molten steel in the mold plays a decisive role in the quality of the slab. In this paper, electromagnetic Swirling Flow in nozzle technology is proposed to control the Flow field in mold. This technology can drive molten steel to rotate inside the submerged entry nozzle by electromagnetic force, thereby controlling the Flow field. This research shows that it can reduce the impact of molten steel on the bottom of nozzle and partly reduce the negative pressure at the upper part of nozzle outlet which is even eliminated by optimizing the structure and angle of nozzle. The area of heat flux of the mold wall becomes larger, and the crest value of heat flux gets lower than that without Swirling in nozzle and any nozzle optimization. The meniscus fluctuates smoothly, and the Flow velocity at the top surface is within a reasonable range. The temperature field distribution in the mold is uniform which was beneficial to the growth of equiaxed crystal and decreased element segregation.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Isij International, 2010
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We began development of Swirling-Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling the Flow pattern in continuous casting molds. As a first step, we developed a Swirling-Flow submerged entry nozzle for round billet casting at the Wakayama works. We then began developing Swirling-Flow submerged entry nozzles for slab casting. The main purpose of the present work was to demonstrate that the formation of Swirling Flow in submerged entry nozzle improves productivity and the quality of products in continuous casting. We examined Swirling-Flow submerged entry nozzles with a swirl blade in these main bodies because such an arrangement is the easiest way to apply Swirling Flow to submerged entry nozzles in continuous casters without investment by facilities. We had only to change the submerged entry nozzle in the experiment. Swirling-Flow submerged entry nozzles for slab casting were developed and their operation examined at the Wakayama and Kashima works. It was found that the proposed submerged entry nozzles increased the casting speed and improved the surface quality of slabs and steel sheets.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Tetsu To Hagane-journal of The Iron and Steel Institute of Japan, 2009
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We have started a development of Swirling Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling Flow pattern in continuous casting molds. As a first step, we h ...

Yuichi Tsukaguchi - One of the best experts on this subject based on the ideXlab platform.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Isij International, 2010
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We began development of Swirling-Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling the Flow pattern in continuous casting molds. As a first step, we developed a Swirling-Flow submerged entry nozzle for round billet casting at the Wakayama works. We then began developing Swirling-Flow submerged entry nozzles for slab casting. The main purpose of the present work was to demonstrate that the formation of Swirling Flow in submerged entry nozzle improves productivity and the quality of products in continuous casting. We examined Swirling-Flow submerged entry nozzles with a swirl blade in these main bodies because such an arrangement is the easiest way to apply Swirling Flow to submerged entry nozzles in continuous casters without investment by facilities. We had only to change the submerged entry nozzle in the experiment. Swirling-Flow submerged entry nozzles for slab casting were developed and their operation examined at the Wakayama and Kashima works. It was found that the proposed submerged entry nozzles increased the casting speed and improved the surface quality of slabs and steel sheets.

  • development of Swirling Flow submerged entry nozzles for slab casting
    Tetsu To Hagane-journal of The Iron and Steel Institute of Japan, 2009
    Co-Authors: Yuichi Tsukaguchi, Katsukiyo Marukawa, Hiroshi Hayashi, Hidenori Kurimoto, Shinichiro Yokoya, Toshihiro Tanaka
    Abstract:

    We have started a development of Swirling Flow submerged entry nozzles in 1997 as a fundamental and effective measure for controlling Flow pattern in continuous casting molds. As a first step, we h ...

Lele Yang - One of the best experts on this subject based on the ideXlab platform.

  • separation characteristics of the gas and liquid phases in a vane type Swirling Flow field
    International Journal of Multiphase Flow, 2018
    Co-Authors: Lele Yang, Dong Zhang, Jingyu Xu
    Abstract:

    Abstract In order to investigate inlet bubble size distribution, gas phase concentration, and Swirling intensity in the Swirling Flow field of a vane-type separator, both Flow loop experiments and numerical studies have been conducted in this work. The bubble size distributions and fractions of local voids were determined using a Malvern RTsizer and electrical resistance tomography, respectively, while the numerical simulations were conducted by coupling the RNG k-e turbulent and mixture multiphase models. As a result, a suitable model for predicting the bubble size distribution parameters d32 and dmax was developed. In addition, the effects of inlet mixture Flow rate, inlet void fraction, and liquid viscosity on the core size of the gas phase in the Swirling Flow field were determined, and the impact of the gas phase on Swirling intensity was characterized using the Swirling number. The obtained results can be used in designing vane-type separators for the crude oil extraction industry.

  • breakup and coalescence regularity of non dilute oil drops in a vane type Swirling Flow field
    Chemical Engineering Research & Design, 2018
    Co-Authors: Dong Zhang, Lele Yang, Jingyu Xu
    Abstract:

    Abstract In this work, in order to investigate the behavior of non-dilute drops, including breakup, coalescence and trajectory, in a 100-mm inner-diameter horizontal Swirling Flow field with low inlet mixture velocity, both an experimental study and numerical simulation were conducted. Inlet oil phase concentration was under 3.0% volume fraction, with an inlet Flow rate ranging from 12 m3/h to 18 m3/h. Malvern RTsizer and Electrical Resistance Tomography were applied for measuring the drop size distribution and oil phase concentration, respectively. Correspondingly, numerical simulations applying a Renormalization-group k-e turbulent model, coupled with a Discrete Phase Model simulating oil phase, were conducted as well. The results showed that small drops in the Flow field tended to coalescence, while the behavior of large drops was determined by the inlet Flow rate. A higher inlet Flow rate led to a thinner oil core with constant inlet oil concentration. Moreover, the simulation results, which corresponded well with the experimental observations, presented oil drops distribution laws of breakup, coalescence and trajectory in a 100-mm inner diameter Swirling Flow field and established a prediction model in a similar Flow field. Finally, regularity of Swirling intense distribution and drop-turbulence interaction in a Swirling Flow field with a low inlet velocity was established. These results provide new information helpful for the design of vane-type separator.