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Author: Samuel Egnew Tingey Publisher: ISBN: Category : Languages : en Pages : 62
Book Description
Oblique weirs are those weirs placed at an angle with respect to the channel centerline. They can be used in canal applications where more discharge is needed, but there is limited freeboard. The discharge coefficients were determined for 54 different weirs by measuring total head for various flows over each weir. These weirs included sharp, half round and quarter-round-crested weirs. There were 18 weirs for each crest shape with three weir heights for each angle tested. The oblique angles tested were 10°, 15°, 25°, 45°, 60°, and 90° with respect to the channel centerline, with the nominal weir heights being 4, 8, and 12 inches. The half-round-crested weirs were the most efficient, followed by the quarter-round-crested weirs and the sharp-crested weirs were the least efficient. By decreasing the oblique angle, the weir length became longer and the weir would be more efficient than the normal weir.
Author: Samuel Egnew Tingey Publisher: ISBN: Category : Languages : en Pages : 62
Book Description
Oblique weirs are those weirs placed at an angle with respect to the channel centerline. They can be used in canal applications where more discharge is needed, but there is limited freeboard. The discharge coefficients were determined for 54 different weirs by measuring total head for various flows over each weir. These weirs included sharp, half round and quarter-round-crested weirs. There were 18 weirs for each crest shape with three weir heights for each angle tested. The oblique angles tested were 10°, 15°, 25°, 45°, 60°, and 90° with respect to the channel centerline, with the nominal weir heights being 4, 8, and 12 inches. The half-round-crested weirs were the most efficient, followed by the quarter-round-crested weirs and the sharp-crested weirs were the least efficient. By decreasing the oblique angle, the weir length became longer and the weir would be more efficient than the normal weir.
Author: D.S. Miller Publisher: CRC Press ISBN: 1351454889 Category : Technology & Engineering Languages : en Pages : 257
Book Description
This manual provides the procedures and data necessary to calculate discharges over and through hydraulic structures. Contents: Introduction; Discharge measurement structures; Discharge relationships and component head losses for hydraulic structures; Headlosses in closed conduit systems flowing full; Analysis of flow conditions and hydraulic design for river diversion in closed conduits; Flow through and over rockfill structures
Author: Kai Ji Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
V-shaped weirs with small angles are efficient in accurately measuring extremely small discharge rates. The concept of slit weirs to measure discharge rates has been studied in recent investigations. Rectangular multi-slit notches or weirs have been shown to extend the range of flow measurement to include both very low and high discharge rates. It is a well-known fact that V-notches whose sections are narrower at lower heads are preferred to rectangular notches to measure small discharge rates in laboratories. To increase the range of discharges measured, the concept of multi-slit weirs using rectangular weirs has been introduced recently. For rectangular multi-slit weirs, experimental data showed that the discharge coefficient C d for multi-slit weirs or a single weir was a function of the Reynolds number R e when R e is based on the width of rectangular weirs. V-notches are generally used for laboratory flow measurements, as they can very precisely measure discharge rates. Hence, the multi-slit weirs formed by V-notches are expected to measure discharges in a very wide range of discharge rates. To represent a common discharge coefficient C d for multi-slit weirs formed of either rectangular or triangular shaped individual weirs, a new Reynolds number R eR is proposed to unify representation of discharge coefficient data for both rectangular shaped and V-shaped multi-slit weir units. C d data for both rectangular and V-shaped multi-slit weirs fall on a single curve and appear to be the function of R eR . At large Reynolds number, R eR, the discharge coefficient C d approaches a constant value of 0.61. This constant also denotes the contraction coefficient for the narrow two-dimensional slit flow. Present test data show that C d for multi-slit V-shaped weirs is generally a function of R eR for b/B
Author: Samuel Egnew Tingey Publisher: ISBN: Category : Languages : en Pages :
Book Description
Oblique weirs are those weirs placed at an angle with respect to the channel centerline. They can be used in canal applications where more discharge is needed, but there is limited freeboard. The discharge coefficients were determined for 54 different weirs by measuring total head for various flows over each weir. These weirs included sharp, half round and quarter-round-crested weirs. There were 18 weirs for each crest shape with three weir heights for each angle tested. The oblique angles tested were 10℗ʻ, 15℗ʻ, 25℗ʻ, 45℗ʻ, 60℗ʻ, and 90℗ʻ with respect to the channel centerline, with the nominal weir heights being 4, 8, and 12 inches. The half-round-crested weirs were the most efficient, followed by the quarter-round-crested weirs and the sharp-crested weirs were the least efficient. By decreasing the oblique angle, the weir length became longer and the weir would be more efficient than the normal weir.
Author: Samuel Egnew Tingey
Author: Samuel Egnew Tingey
Author: Israel Dagan
Author: H. J. Tracy
Author: Carl Edward Kindsvater
Author: D.S. Miller
Author: John Shen
Author: Geoffrey Warren Hall
Author: Kai Ji
Author: D. D. Gonzalez
Author: Samuel Egnew Tingey