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FE HAYDRAU 2

FE HAYDRAU 2
24問 • 2年前
  • Lance Margaux Sampayan
    • 通報

    問題一覧

  • 1

    is defined as all-natural streams and artificial canals having surfaces exposed to the pressure of the atmosphere.

    Uniform Flow In Open Channel

  • 2

    has two sides and a bottom, where the flow satisfies nonslip condition.

    Open Channel

  • 3

    1. Natural streams or rivers 2. Artificial canals or flumes 3. Sewers, tunnels and pipeline not flowing full

    Three Main Types of Open Channel

  • 4

    As suggested by Bakhmeteff in 1911, it is a useful parameter in channel flow

    Specific Energy

  • 5

    Fundamental law of turbulent flow applies to open channel presented

    Chezy

  • 6

    Simplest of all open channel problem is the uniform flow condition.Simplest of all open channel problem is the uniform flow condition.

    Uniform Flow

  • 7

    the velocity, depth of flow, and the cross-sectional area of flow at any point of the stream must be constant.

    Uniform Flow

  • 8

    the stream surface is parallel to the channel bed and the energy grade line is parallel to the stream surface,

    Uniform Flow

  • 9

    the slope of the energy grade line S is equal to the slope of the channel bed So.

    Uniform Flow

  • 10

    The average boundary shear stress, t, acting over the wetted surface of the channel is given by

    Boundary Shear Stress

  • 11

    is the depth at which uniform flow will occur in an open channel.

    Normal Depth

  • 12

    may be determined from Chezy formula with S=So. The resulting equation usually requires a trial and error solution.

    Normal Deptg

  • 13

    given total specific energy E, for an open channel flow, there exist two stages or depths of flow that will give the same discharge.

    Alternate Stages Of Flow

  • 14

    - Flow is tranquil - Depth is called subcritical depth - Froude Number, F<1

    Upper Stage

  • 15

    - Flow is rapid or shooting - Depth is called supercritical depth - Froude Number, F>1

    Lower Stage

  • 16

    2 important characteristics of channel flow:

    a. There is a depth of flow do which maximizes the flow Q. This is called the critical depth or critical stage of flow. b.For any value of flow Q between 0 and Qmax, there are two possible depths of flow, dy and da, occurring with the same specific energy E. These are the upper stage and lower stage of flow, respectively. Collectively, these two stages of flow are known as the alternate stages.

  • 17

    the depth at which for a given total specific energy H, the discharge is maximum, or it is the depth at which for a given discharge Q, the total specific energy is minimum.the depth at which for a given total specific energy H, the discharge is maximum, or it is the depth at which for a given discharge Q, the total specific energy is minimum.

    Critical Depth

  • 18

    most efficient cross section of an open channel is the one which, with a given slope, area, and roughness factor, will have the maximum capacity. • This cross section is the one having the smallest wetted perimeter, as can be seen from an examination of one of the open-channel formulas. > maximum discharge Q means maximum velocity V or maximum hydraulic radius R. • Moreover, maximum R implies minimum wetted perimeter P (minimum resistance between the channel's surface and the flowing liquid).most efficient cross section of an open channel is the one which, with a given slope, area, and roughness factor, will have the maximum capacity. • This cross section is the one having the smallest wetted perimeter, as can be seen from an examination of one of the open-channel formulas. > maximum discharge Q means maximum velocity V or maximum hydraulic radius R. • Moreover, maximum R implies minimum wetted perimeter P (minimum resistance between the channel's surface and the flowing liquid).

    MES

  • 19

    Discharge, Q, is maximum when depth, d = 0.938 Velocity, v, is maximum when depth, d = 0.82 D

    Circular Section

  • 20

    -occurs where the stream enters and leaves the channel; at obstructions such as dams, weirs, or bridge piers; and at changes in the form of cross section which may be necessitated by natural conditions of soil and topography. -Changes in cross section in open channel flow may be either gradual or abrupt. -The Manning equation for uniform flow can be applied to non-uniform flow with accuracy dependent on the length of reach L taken. -long stream should be divided into several reaches of varying length such that the change in depth is roughly the same within each reach.

    Non-Uniform Flow

  • 21

    the term used to express the resulting shock (pressure rise) in a pipeline caused by the sudden decrease or stoppage of motion (rate of flow or velocity) of the fluid.

    Water Hammer

  • 22

    the excess pressure produced decreases uniformly from the value at the valve to zero at the intake. The maximum water-hammer pressure Ph developed is given approximately by

    Slow Closure

  • 23

    is an abrupt increase in depth of rapidly flowing water.is an abrupt increase in depth of rapidly flowing water.

    Hydraulic Jump

  • 24

    is the only means by which the depth of flow can change from less than critical to greater than critical to a uniform channel.

    Hydraulic Jump

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    問題一覧

  • 1

    is defined as all-natural streams and artificial canals having surfaces exposed to the pressure of the atmosphere.

    Uniform Flow In Open Channel

  • 2

    has two sides and a bottom, where the flow satisfies nonslip condition.

    Open Channel

  • 3

    1. Natural streams or rivers 2. Artificial canals or flumes 3. Sewers, tunnels and pipeline not flowing full

    Three Main Types of Open Channel

  • 4

    As suggested by Bakhmeteff in 1911, it is a useful parameter in channel flow

    Specific Energy

  • 5

    Fundamental law of turbulent flow applies to open channel presented

    Chezy

  • 6

    Simplest of all open channel problem is the uniform flow condition.Simplest of all open channel problem is the uniform flow condition.

    Uniform Flow

  • 7

    the velocity, depth of flow, and the cross-sectional area of flow at any point of the stream must be constant.

    Uniform Flow

  • 8

    the stream surface is parallel to the channel bed and the energy grade line is parallel to the stream surface,

    Uniform Flow

  • 9

    the slope of the energy grade line S is equal to the slope of the channel bed So.

    Uniform Flow

  • 10

    The average boundary shear stress, t, acting over the wetted surface of the channel is given by

    Boundary Shear Stress

  • 11

    is the depth at which uniform flow will occur in an open channel.

    Normal Depth

  • 12

    may be determined from Chezy formula with S=So. The resulting equation usually requires a trial and error solution.

    Normal Deptg

  • 13

    given total specific energy E, for an open channel flow, there exist two stages or depths of flow that will give the same discharge.

    Alternate Stages Of Flow

  • 14

    - Flow is tranquil - Depth is called subcritical depth - Froude Number, F<1

    Upper Stage

  • 15

    - Flow is rapid or shooting - Depth is called supercritical depth - Froude Number, F>1

    Lower Stage

  • 16

    2 important characteristics of channel flow:

    a. There is a depth of flow do which maximizes the flow Q. This is called the critical depth or critical stage of flow. b.For any value of flow Q between 0 and Qmax, there are two possible depths of flow, dy and da, occurring with the same specific energy E. These are the upper stage and lower stage of flow, respectively. Collectively, these two stages of flow are known as the alternate stages.

  • 17

    the depth at which for a given total specific energy H, the discharge is maximum, or it is the depth at which for a given discharge Q, the total specific energy is minimum.the depth at which for a given total specific energy H, the discharge is maximum, or it is the depth at which for a given discharge Q, the total specific energy is minimum.

    Critical Depth

  • 18

    most efficient cross section of an open channel is the one which, with a given slope, area, and roughness factor, will have the maximum capacity. • This cross section is the one having the smallest wetted perimeter, as can be seen from an examination of one of the open-channel formulas. > maximum discharge Q means maximum velocity V or maximum hydraulic radius R. • Moreover, maximum R implies minimum wetted perimeter P (minimum resistance between the channel's surface and the flowing liquid).most efficient cross section of an open channel is the one which, with a given slope, area, and roughness factor, will have the maximum capacity. • This cross section is the one having the smallest wetted perimeter, as can be seen from an examination of one of the open-channel formulas. > maximum discharge Q means maximum velocity V or maximum hydraulic radius R. • Moreover, maximum R implies minimum wetted perimeter P (minimum resistance between the channel's surface and the flowing liquid).

    MES

  • 19

    Discharge, Q, is maximum when depth, d = 0.938 Velocity, v, is maximum when depth, d = 0.82 D

    Circular Section

  • 20

    -occurs where the stream enters and leaves the channel; at obstructions such as dams, weirs, or bridge piers; and at changes in the form of cross section which may be necessitated by natural conditions of soil and topography. -Changes in cross section in open channel flow may be either gradual or abrupt. -The Manning equation for uniform flow can be applied to non-uniform flow with accuracy dependent on the length of reach L taken. -long stream should be divided into several reaches of varying length such that the change in depth is roughly the same within each reach.

    Non-Uniform Flow

  • 21

    the term used to express the resulting shock (pressure rise) in a pipeline caused by the sudden decrease or stoppage of motion (rate of flow or velocity) of the fluid.

    Water Hammer

  • 22

    the excess pressure produced decreases uniformly from the value at the valve to zero at the intake. The maximum water-hammer pressure Ph developed is given approximately by

    Slow Closure

  • 23

    is an abrupt increase in depth of rapidly flowing water.is an abrupt increase in depth of rapidly flowing water.

    Hydraulic Jump

  • 24

    is the only means by which the depth of flow can change from less than critical to greater than critical to a uniform channel.

    Hydraulic Jump