Experimental evaluation of discharge coefficient of the combined culvert-piano key weir

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Izadinia Elham; Omidvar Mozhdeh

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN WATER RESEARCH JOURNAL Year:2021 | Volume:15 | Issue:3 (42) Page(s): 25-36

Download Full-Text

Persian Verion

View:

189

Download:

Cites:

Information Journal Paper

Title

Experimental evaluation of discharge coefficient of the combined culvert-piano key weir

Author(s)

Izadinia Elham | Omidvar Mozhdeh | Issue Writer Certificate

Keywords

Discharge coefficient

Head-discharge curve

Culvert

Piano key weir

Abstract

Introductions Increasing demand for water has challenged governments to manage water resources by optimizing and designing highly efficient hydraulic systems. One common water-management device is the weir which is used to modify the water-flow within rivers. Existing weirs are not typically responsive to water demand. Consequently, it would be advantageous if the water supply from these structures could be modified to meet fluctuating water demand. Therefore, new structures could replace existing structures or modifications could be made to current weirs to achieve this desired control. Candidate changes could include an extension of the weir crown or an opening up of the weir body to modify the flow. When the flow can pass over and under the structure, one of the proposed options is a combined Culvert-weir, which also increases the sediment and flow rate. Choosing the appropriate overflow to achieve this goal is very important. In this research, the Piano key weir has been used as the overflow of this combined structure due to its high performance. The innovative shape of a non-rectilinear weir, known as the Piano-Key weir PKW, increases the total effective crest length, escalating the discharge capacity of the weir. A PKW is a modified form of a labyrinth weir with the specific geometrical characteristics including inlet and outlet overhangs or inclined inlet and outlet keys floors, forming a new set of variables. Methods The experiments have been performed in hydraulic laboratory of Shahid Ashrafi Esfahani University. The tests were conducted in a rectangular channel with 10 m long, 0. 6 m wide, and 0. 75 m high. Models were built with galvanized sheet with 0. 9 mm thickness. Laboratory models of the combined Culvert-weir were examined by considering the varied height and length of the overflow, as well as the different openings for Culverts. In addition, the performance of the Culvert and Piano key weir was investigated and compared with the combined structure. Experiments had been done in free flow conditions and in discharge range of 5 to 50 lit/s, for Piano key weirs, Culverts and combined Culvert-weir structures. The geometry parameters of models are shown in Table (1). Results The results indicated that in the PKW the discharge 25% and 12. 5% is increased with %50 and 63% increasing in height and width of the weir respectively. Thus, the effect of the height on increasing the discharge of the weir is more considerable. In combined structures the effects of Culvert opening are more than weir height. The results show that for a specific head, the discharge of combined structure is greater than the discharge of weir and Culvert and the efficiency of combined structure is approximately 10% more than Culvert and weir. The results showed that in Piano key weirs, the Discharge coefficient decreases with the dimensionless ratio of head to the weir height and in the combined structure, this trend is increasing. Therefore, in situations where the flow rate is high and it is not possible to use a high Piano key weir, a combined Culvert-weir is a good option.

Cites

No record.

References

No record.

Cite

APA: Copy

Izadinia, Elham, & Omidvar, Mozhdeh. (2021). Experimental evaluation of discharge coefficient of the combined culvert-piano key weir. IRANIAN WATER RESEARCH JOURNAL, 15(3 (42) ), 25-36. SID. https://sid.ir/paper/952396/en

Vancouver: Copy

Izadinia Elham, Omidvar Mozhdeh. Experimental evaluation of discharge coefficient of the combined culvert-piano key weir. IRANIAN WATER RESEARCH JOURNAL[Internet]. 2021;15(3 (42) ):25-36. Available from: https://sid.ir/paper/952396/en

IEEE: Copy

Elham Izadinia, and Mozhdeh Omidvar, “Experimental evaluation of discharge coefficient of the combined culvert-piano key weir,” IRANIAN WATER RESEARCH JOURNAL, vol. 15, no. 3 (42) , pp. 25–36, 2021, [Online]. Available: https://sid.ir/paper/952396/en

Related Journal Papers

No record.

Related Seminar Papers

No record.

Related Plans

No record.

Recommended Workshops