Laminar Flow Analysis Between Stationary and Rotating Disks with Inflow PDF Download
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Author: Upendra S. Rohatgi
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
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Book Description
Author: Upendra S. Rohatgi
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
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Book Description
Author: Upendra Rohatgi
Publisher:
ISBN:
Category :
Languages : en
Pages : 126
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Author: Upendra S. Rohatgi
Publisher:
ISBN:
Category : Disks, Rotating
Languages : en
Pages : 124
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Book Description
The laminar flow between a rotating and a stationary disk with inflow was analyzed. Solutions to the dimensionless governing equations are sought by expanding each of the velocity components in powers of inverse radius. The equations to leading order are those for the configuration with no inflow. The subsequent orders yield sets of linear ordinary differential equations. Solutions are obtained for the first two of these subsequent orders. The solutions indicate that inflow tends to increase the magnitude of the azimuthal velocity in the flow between the two disks and to decrease the torque on the rotating disk. For Prandtl number one, an energy integral is obtained which relates the temperature distribution to the velocity distribution for all Reynolds numbers and therefore eliminates the needs for separate solution of the energy equation.
Author: R. A. Conover
Publisher:
ISBN:
Category : Disks, Rotating
Languages : en
Pages : 7
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Author: Dad Farmanfarma
Publisher:
ISBN:
Category : Disks, Rotating
Languages : en
Pages : 116
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Author: Chyan Shiang Chiou
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
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Book Description
Laminar flow of a fluid flowing radially outward in the gap between a stationary porous disk and a parallel rotating nonporous disk, through which the fluid is injected, was studied theoretically and experimentally. The special case with both disks stationary was also included. Special theoreted attention was given to the range of injection Reynolds number and rotational parameter needed for comparison with experimental pressure distributions and resistance torques. The experiments were carried out with air flowing between disks 5 inches in diameter. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 36
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 720
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Fernando Labbe
Publisher:
ISBN:
Category : Disks, Rotating
Languages : en
Pages : 266
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The viscous flow between two parallel disks rotating in the same direction with the same velocity is investigated. The fluid enters the space between the disks at a certain in radius in the radial direction. Because of the shear forces, it assumes a rotating motion with about the velocity of the disks. The centrifugal forces then build up a pressure increase in the radial direction. The arrangement corresponds to a centrifugal fluid pump, which may be advantageous if cavitation is a problem. The general equations of viscous flow are simplified by the assumption that the pressure difference normal to the disks is negligible (boundary layer assumptions). One obtains a system of parabolic partial differential equations. For large radii the deviation from rigid body rotation (with the angular velocity of the disks) is small. The linearized equations which then result are solved analytically. The velocity profiles depend upon a parameter containing e kinematic viscosity, the angular velocity and the distance of the disks, but not he radius. The non-linearized parabolic differential equations are approximated by a difference scheme and solved numerically. The results are given in non-dimensional form with the entrance velocity and the distance of the disks as parameters. Furthermore, the efficiency of the pump is computed from the gain of the total pressure and the torque at the shaft of the rotating disks.
