The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform

Kim Tiow Ooi - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of the Centrifugal Force Effect to a Revolving Vane (RV) Machine
    2013
    Co-Authors: Alison Subiantoro, Kim Tiow Ooi
    Abstract:

    The Revolving Vane (RV) machine is unique because the cylinder rotates together with the rotor at their respective axis. This causes various unique behaviors that are not previously observed in the conventional rotary machines. In this paper, the effects of the Centrifugal Force to the behavior of the machine are investigated. It is found that the Centrifugal Force affects the average output torque through the shaft bearing load and friction loss. Interestingly, if the center of mass is set properly, the Centrifugal Force can help to offset the pressure Force acting at the shaft. This helps to reduce the bearing load and increases the mechanical efficiency of the machine. The finding can be used to optimize the RV machine design.

  • t Investigation of the Centrifugal Force Effect to a Revolving Vane (RV) Expander
    2012
    Co-Authors: Alison Subiantoro, Kim Tiow Ooi
    Abstract:

    The Revolving Vane (RV) machine is unique because the cylinder rotates together with the rotor at their respective axis. This causes various unique behaviors that are not previously observed in the conventional rotary machines. In this paper, the effects of the Centrifugal Force to the behavior of the machine are investigated. It is found that the Centrifugal Force affects the average output torque through the shaft bearing load and friction loss. Interestingly, if the center of mass is set properly, the Centrifugal Force can help to offset the pressure Force acting at the shaft. This helps to reduce the bearing load and increases the mechanical efficiency of the machine. The finding can be used to optimize the RV machine design.

Hu Guoxin - One of the best experts on this subject based on the ideXlab platform.

  • INFILTRATION AND SOLIDIFICATION/REMELTING OF MOLTEN ALUMINUM IN A Centrifugal Force FIELD
    2003
    Co-Authors: Hu Guoxin
    Abstract:

    The adiabatic infiltration and the solidification/remelting of molten aluminum through a porous preform in a Centrifugal Force field are modeled numerically. The temperature and solid volume fraction profiles are presented for representative parameters. The numerical results show that the transient solidification and remelting in the Centrifugal Force field depend greatly on the infiltration kinetics and thermodynamics of the composite. The regional extent of the eutectic solid metal and its solid volume fraction increase with the moving of the infiltration front. The speed of the moving infiltration and remelting fronts decrease with the decreasing of porosity and rotational speed, but the speed difference between the moving fronts and the regional extend of the eutectic solid metal increases with the decreasing of porosity and decreases with the decreasing of rotational speed.

  • HEAT TRANSFER OF MOLTEN METAL INFILTRATE THROUGH SiC PREFORM IN Centrifugal Force FIELD
    Journal of Chemical Industry and Engineering, 2002
    Co-Authors: Hu Guoxin
    Abstract:

    In this paper,molten aluminum flow with heat transfer though SiC porous media in a Centrifugal Force field is described with a mathematical and physical model.The implicit TDMA Algorithm and first kind of first-order upwind difference were used to solve the conservation equation associated with appropriate boundary conditions.The distribution of molten aluminum velocity and pressure,the temperature field of flow and porous media in a Centrifugal Force field are examined for different conditions.The results show that local temperature of fluid phase is higher than that of solid phase.The temperature difference between fluid and solid decreases with the moving of infiltrated distance.The infiltration of molten aluminum through SiC porous media in the Centrifugal Force field depends greatly on the angular velocity and the temperature of preheated SiC porous media.SiC volume fraction has a strong effect on velocity and pressure drop of molten aluminum.

Alison Subiantoro - One of the best experts on this subject based on the ideXlab platform.

  • Investigation of the Centrifugal Force Effect to a Revolving Vane (RV) Machine
    2013
    Co-Authors: Alison Subiantoro, Kim Tiow Ooi
    Abstract:

    The Revolving Vane (RV) machine is unique because the cylinder rotates together with the rotor at their respective axis. This causes various unique behaviors that are not previously observed in the conventional rotary machines. In this paper, the effects of the Centrifugal Force to the behavior of the machine are investigated. It is found that the Centrifugal Force affects the average output torque through the shaft bearing load and friction loss. Interestingly, if the center of mass is set properly, the Centrifugal Force can help to offset the pressure Force acting at the shaft. This helps to reduce the bearing load and increases the mechanical efficiency of the machine. The finding can be used to optimize the RV machine design.

  • t Investigation of the Centrifugal Force Effect to a Revolving Vane (RV) Expander
    2012
    Co-Authors: Alison Subiantoro, Kim Tiow Ooi
    Abstract:

    The Revolving Vane (RV) machine is unique because the cylinder rotates together with the rotor at their respective axis. This causes various unique behaviors that are not previously observed in the conventional rotary machines. In this paper, the effects of the Centrifugal Force to the behavior of the machine are investigated. It is found that the Centrifugal Force affects the average output torque through the shaft bearing load and friction loss. Interestingly, if the center of mass is set properly, the Centrifugal Force can help to offset the pressure Force acting at the shaft. This helps to reduce the bearing load and increases the mechanical efficiency of the machine. The finding can be used to optimize the RV machine design.

Guenter Ahlers - One of the best experts on this subject based on the ideXlab platform.

  • Effect of the Centrifugal Force on domain chaos in Rayleigh-Bénard convection.
    Physical review. E Statistical nonlinear and soft matter physics, 2006
    Co-Authors: Nathan Becker, J D Scheel, M C Cross, Guenter Ahlers
    Abstract:

    Experiments and simulations from a variety of sample sizes indicated that the Centrifugal Force significantly affects the domain-chaos state observed in rotating Rayleigh-Bénard convection-patterns. In a large-aspect-ratio sample, we observed a hybrid state consisting of domain chaos close to the sample center, surrounded by an annulus of nearly stationary nearly radial rolls populated by occasional defects reminiscent of undulation chaos. Although the Coriolis Force is responsible for domain chaos, by comparing experiment and simulation we show that the Centrifugal Force is responsible for the radial rolls. Furthermore, simulations of the Boussinesq equations for smaller aspect ratios neglecting the Centrifugal Force yielded a domain precession-frequency f approximately epsilon(mu) with mu approximately equal to 1 as predicted by the amplitude-equation model for domain chaos, but contradicted by previous experiment. Additionally the simulations gave a domain size that was larger than in the experiment. When the Centrifugal Force was included in the simulation, mu and the domain size were consistent with experiment.

  • Effect of the Centrifugal Force on domain chaos in Rayleigh-Bénard convection.
    Physical Review E, 2006
    Co-Authors: Nathan Becker, J D Scheel, Michael Cross, Guenter Ahlers
    Abstract:

    Experiments and simulations from a variety of sample sizes indicated that the Centrifugal Force significantly affects the domain-chaos state observed in rotating Rayleigh-Benard convection-patterns. In a large-aspect-ratio sample, we observed a hybrid state consisting of domain chaos close to the sample center, surrounded by an annulus of nearly stationary nearly radial rolls populated by occasional defects reminiscent of undulation chaos. Although the Coriolis Force is responsible for domain chaos, by comparing experiment and simulation we show that the Centrifugal Force is responsible for the radial rolls. Furthermore, simulations of the Boussinesq equations for smaller aspect ratios neglecting the Centrifugal Force yielded a domain precession-frequency f~epsilonµ with µ~=1 as predicted by the amplitude-equation model for domain chaos, but contradicted by previous experiment. Additionally the simulations gave a domain size that was larger than in the experiment. When the Centrifugal Force was included in the simulation, µ and the domain size were consistent with experiment.

Chen Guang - One of the best experts on this subject based on the ideXlab platform.

  • Relation Between Centrifugal Force of Steel Balls and Speed of a Ball Mill
    Journal of Anshan Institute of Iron and Steel Technology, 2002
    Co-Authors: Chen Guang
    Abstract:

    The changing rules between Centrifugal Force of steel balls and speed of grinding mill have been set forth in this paper.The results show that,with the increase of the speed of the ball mill,Centrifugal Force increases gradually to its maximum value (about 34% of the total weight of all steel balls) and then begins to decrease until zero,and at the same time,the angle between Centrifugal Force and its vertical axis decreases from about 90 0 to its minimum value (about 25 0) and then begins to increase.A conclusion can be drawn from this that Centrifugal Force is one of the main factors causing stronger vibration of a mill operated at high speed.