Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir

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MÜLLER, Matej ;NOVAK, Gorazd ;STEINMAN, Franc ;RAK, Gašper ;BAJCAR, Tom .
Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 61, n.9, p. 498-506, june 2018. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/>. Date accessed: 06 jun. 2020. 
doi:http://dx.doi.org/10.5545/sv-jme.2015.2453.
Müller, M., Novak, G., Steinman, F., Rak, G., & Bajcar, T.
(2015).
Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir.
Strojniški vestnik - Journal of Mechanical Engineering, 61(9), 498-506.
doi:http://dx.doi.org/10.5545/sv-jme.2015.2453
@article{sv-jmesv-jme.2015.2453,
	author = {Matej  Müller and Gorazd  Novak and Franc  Steinman and Gašper  Rak and Tom  Bajcar},
	title = {Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {61},
	number = {9},
	year = {2015},
	keywords = {side weir; discharge coefficient; flap gate; overflow gate; visualization method},
	abstract = {Bottom-hinged flap gates on side weirs are often used for the regulation of flow diversion in case of water abstraction for a variety of needs. In this study, a new equation for the discharge coefficient of a bottom-hinged flap gate on a side weir was proposed on the basis of discharge measurements. The equation was divided into two parts. The first part covers the impact of the sharp-crested side weir and the second the influence of the position and the width of the flap gate. In this manner, the discharge coefficient can be calculated with other authors’ equations for a sharp-crested side weir, which then must be multiplied by the new proposed coefficient. Very good agreement was found between the obtained discharge coefficients and the one calculated with the proposed equation. Furthermore, the results were compared with the equations of other authors for the discharge coefficients of sharp- and broad crested side weirs. The agreement was found to be very good. Additionally, measurements of water levels along the edge of the flap gate and measurements of the velocity field were carried out with a computer-aided visualization method. From these measurements, it was possible to show that the contraction of the water jet varies with the gate-opening angle. It was also found that the side weir with a flap gate has the most favorable hydrodynamic shape around the gate-opening angle of 33°, where the discharge coefficient reaches its maximum.},
	issn = {0039-2480},	pages = {498-506},	doi = {10.5545/sv-jme.2015.2453},
	url = {https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/}
}
Müller, M.,Novak, G.,Steinman, F.,Rak, G.,Bajcar, T.
2015 June 61. Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 61:9
%A Müller, Matej 
%A Novak, Gorazd 
%A Steinman, Franc 
%A Rak, Gašper 
%A Bajcar, Tom 
%D 2015
%T Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir
%B 2015
%9 side weir; discharge coefficient; flap gate; overflow gate; visualization method
%! Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir
%K side weir; discharge coefficient; flap gate; overflow gate; visualization method
%X Bottom-hinged flap gates on side weirs are often used for the regulation of flow diversion in case of water abstraction for a variety of needs. In this study, a new equation for the discharge coefficient of a bottom-hinged flap gate on a side weir was proposed on the basis of discharge measurements. The equation was divided into two parts. The first part covers the impact of the sharp-crested side weir and the second the influence of the position and the width of the flap gate. In this manner, the discharge coefficient can be calculated with other authors’ equations for a sharp-crested side weir, which then must be multiplied by the new proposed coefficient. Very good agreement was found between the obtained discharge coefficients and the one calculated with the proposed equation. Furthermore, the results were compared with the equations of other authors for the discharge coefficients of sharp- and broad crested side weirs. The agreement was found to be very good. Additionally, measurements of water levels along the edge of the flap gate and measurements of the velocity field were carried out with a computer-aided visualization method. From these measurements, it was possible to show that the contraction of the water jet varies with the gate-opening angle. It was also found that the side weir with a flap gate has the most favorable hydrodynamic shape around the gate-opening angle of 33°, where the discharge coefficient reaches its maximum.
%U https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/
%0 Journal Article
%R 10.5545/sv-jme.2015.2453
%& 498
%P 9
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 61
%N 9
%@ 0039-2480
%8 2018-06-27
%7 2018-06-27
Müller, Matej, Gorazd  Novak, Franc  Steinman, Gašper  Rak, & Tom  Bajcar.
"Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir." Strojniški vestnik - Journal of Mechanical Engineering [Online], 61.9 (2015): 498-506. Web.  06 Jun. 2020
TY  - JOUR
AU  - Müller, Matej 
AU  - Novak, Gorazd 
AU  - Steinman, Franc 
AU  - Rak, Gašper 
AU  - Bajcar, Tom 
PY  - 2015
TI  - Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.2453
KW  - side weir; discharge coefficient; flap gate; overflow gate; visualization method
N2  - Bottom-hinged flap gates on side weirs are often used for the regulation of flow diversion in case of water abstraction for a variety of needs. In this study, a new equation for the discharge coefficient of a bottom-hinged flap gate on a side weir was proposed on the basis of discharge measurements. The equation was divided into two parts. The first part covers the impact of the sharp-crested side weir and the second the influence of the position and the width of the flap gate. In this manner, the discharge coefficient can be calculated with other authors’ equations for a sharp-crested side weir, which then must be multiplied by the new proposed coefficient. Very good agreement was found between the obtained discharge coefficients and the one calculated with the proposed equation. Furthermore, the results were compared with the equations of other authors for the discharge coefficients of sharp- and broad crested side weirs. The agreement was found to be very good. Additionally, measurements of water levels along the edge of the flap gate and measurements of the velocity field were carried out with a computer-aided visualization method. From these measurements, it was possible to show that the contraction of the water jet varies with the gate-opening angle. It was also found that the side weir with a flap gate has the most favorable hydrodynamic shape around the gate-opening angle of 33°, where the discharge coefficient reaches its maximum.
UR  - https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/
@article{{sv-jme}{sv-jme.2015.2453},
	author = {Müller, M., Novak, G., Steinman, F., Rak, G., Bajcar, T.},
	title = {Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {61},
	number = {9},
	year = {2015},
	doi = {10.5545/sv-jme.2015.2453},
	url = {https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/}
}
TY  - JOUR
AU  - Müller, Matej 
AU  - Novak, Gorazd 
AU  - Steinman, Franc 
AU  - Rak, Gašper 
AU  - Bajcar, Tom 
PY  - 2018/06/27
TI  - Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 61, No 9 (2015): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2015.2453
KW  - side weir, discharge coefficient, flap gate, overflow gate, visualization method
N2  - Bottom-hinged flap gates on side weirs are often used for the regulation of flow diversion in case of water abstraction for a variety of needs. In this study, a new equation for the discharge coefficient of a bottom-hinged flap gate on a side weir was proposed on the basis of discharge measurements. The equation was divided into two parts. The first part covers the impact of the sharp-crested side weir and the second the influence of the position and the width of the flap gate. In this manner, the discharge coefficient can be calculated with other authors’ equations for a sharp-crested side weir, which then must be multiplied by the new proposed coefficient. Very good agreement was found between the obtained discharge coefficients and the one calculated with the proposed equation. Furthermore, the results were compared with the equations of other authors for the discharge coefficients of sharp- and broad crested side weirs. The agreement was found to be very good. Additionally, measurements of water levels along the edge of the flap gate and measurements of the velocity field were carried out with a computer-aided visualization method. From these measurements, it was possible to show that the contraction of the water jet varies with the gate-opening angle. It was also found that the side weir with a flap gate has the most favorable hydrodynamic shape around the gate-opening angle of 33°, where the discharge coefficient reaches its maximum.
UR  - https://www.sv-jme.eu/article/influence-of-the-operating-and-geometric-characteristics-of-a-bottom-hinged-flap-gate-on-the-discharge-coefficient-of-a-side-weir/
Müller, Matej, Novak, Gorazd, Steinman, Franc, Rak, Gašper, AND Bajcar, Tom.
"Influence of the Operating and Geometric Characteristics of a Bottom-hinged Flap Gate on the Discharge Coefficient of a Side Weir" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 61 Number 9 (27 June 2018)

Authors

Affiliations

  • DHD Ltd, Digital Hydrodynamics, Maribor, Slovenia 1
  • Hidroinštitut, Institute for Hydraulic Research, Ljubljana, Slovenia 2
  • University of Ljubljana, Faculty for Civil and Geodetic Engineering, Chair of Fluid Mechanics with Laboratory, Ljubljana, Slovenia 3
  • University of Ljubljana, Faculty of Mechanical Engineering, Chair of Power Engineering, Ljubljana, Slovenia 4

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 61(2015)9, 498-506

https://doi.org/10.5545/sv-jme.2015.2453

Bottom-hinged flap gates on side weirs are often used for the regulation of flow diversion in case of water abstraction for a variety of needs. In this study, a new equation for the discharge coefficient of a bottom-hinged flap gate on a side weir was proposed on the basis of discharge measurements. The equation was divided into two parts. The first part covers the impact of the sharp-crested side weir and the second the influence of the position and the width of the flap gate. In this manner, the discharge coefficient can be calculated with other authors’ equations for a sharp-crested side weir, which then must be multiplied by the new proposed coefficient. Very good agreement was found between the obtained discharge coefficients and the one calculated with the proposed equation. Furthermore, the results were compared with the equations of other authors for the discharge coefficients of sharp- and broad crested side weirs. The agreement was found to be very good. Additionally, measurements of water levels along the edge of the flap gate and measurements of the velocity field were carried out with a computer-aided visualization method. From these measurements, it was possible to show that the contraction of the water jet varies with the gate-opening angle. It was also found that the side weir with a flap gate has the most favorable hydrodynamic shape around the gate-opening angle of 33°, where the discharge coefficient reaches its maximum.

side weir; discharge coefficient; flap gate; overflow gate; visualization method