Forced hydraulic jump on non-protruding rough beds

Date

2011-10-01

Author

Tokyay, Nuray
Simsek, C.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

133
views

0
downloads

Baffle blocks and sills are commonly used to stabilize the location of a hydraulic jump and shorten its length. However, corrugations or prismatic roughness elements may be effective alternatives to them. In the present study, experiments were performed to determine the effects of corrugations and prismatic roughness elements on fundamental characteristics of jump such as length, tailwater depth, and energy dissipation capacity. Corrugations were placed to cover the entire length of the basin. Prismatic roughness elements were placed in two different arrangements as strip and staggered. The results showed that the length of jump was reduced about 35% by corrugations, 40% by strip roughness, and 35%-55% by staggered roughness. The tailwater depth reduction was 20% for corrugations, 5%-13% for strip roughness, and 7%-15% for the staggered roughness compared to classical jump. The roughness elements induce 3%-10% more energy dissipation than that of classical jump.

Subject Keywords

Energy dissipation, Prismatic roughness, Corrugation, Hydraulic jump

URI

https://hdl.handle.net/11511/31075

Journal

CANADIAN JOURNAL OF CIVIL ENGINEERING

DOI

https://doi.org/10.1139/l11-072

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

A NUMERICAL AND EXPERIMENTAL STUDY ON THE CHARACTERISTICS OF HYDRAULIC JUMPS ON ROUGH BEDS Velioglu, Deniz; Tokyay, Nuray; Dincer, Ali Ersin (2015-07-03) Baffle blocks and sills are common accessory devices which are used in order to stabilize the location of a hydraulic jump and shorten the length of a stilling basin. On the other hand, strip roughness elements which cover the entire length of a basin may be an alternative. The objective of this study is to determine the effects of this type of roughness elements on the characteristics of hydraulic jumps such as conjugate depth ratio, jump length and energy dissipation. The study is carried out using experi...
Effects of different bed roughnesses on the characteristics of hydraulic jumps Velioğlu, Deniz; Tokyay, Nuray; Department of Civil Engineering (2012) In practice, baffle blocks and sills are commonly being used to stabilize the location of a hydraulic jump and shorten the length of a stilling basin. On the other hand, gravels, corrugations and rectangular prismatic roughnesses which cover the entire length of the basin or placed in a staggered manner may be an alternative. The objective of this study is to determine the effects of these roughness elements on the characteristics of hydraulic jumps such as conjugate depth, jump length and energy dissipatio...
Forced hydraulic jump on artificially roughened beds Şimşek, Çağdaş; Tokyay, Nuray; Department of Civil Engineering (2006) In the scope of the study, prismatic roughness elements with different longitudinal spacing and arrangements have been tested in a rectangular flume in order to reveal their effects on fundamental characteristics of a hydraulic jump. Two basic roughness types with altering arrangements have been tested. Roughness elements of the first type extends through the channel width against the flow with varying length and pitch ratios for different arrangements. The second type is of staggered essence and produced b...
Experimental investigation of uplift on seismic base isolators / Erkakan, Evren; Caner, Alp; Department of Civil Engineering (2014) Elastomeric rubber bearings reinforced with steel shims, are used to provide structural support in vertical direction and allow horizontal movements for the structure subjected to earthquake and thermal loads. Generally, it is known that tensile stress or uplift may occur when the structure is subjected to strong ground motion or structure have large height-to-width aspect ratio to develop a stability concern subjected to lateral loads. The main focus of this research is to investigate the change in charact...
Experimental investigation on sharp crested rectangular weirs Şişman, H. Çiğdem; Altan Sakarya, Ayşe Burcu; Department of Civil Engineering (2009) Sharp crested rectangular weirs used for discharge measurement purposes in open channel hydraulics are investigated experimentally. A series of experiments were conducted by measuring discharge and head over the weir for different weir heights for full width weir. It is seen that after a certain weir height, head and discharge relation does not change. Hence a constant weir height is determined. For that height; discharge and head over the weir are measured for variable weir width, starting from the full wi...

Citation Formats

N. Tokyay and C. Simsek, “Forced hydraulic jump on non-protruding rough beds,” CANADIAN JOURNAL OF CIVIL ENGINEERING, pp. 1136–1144, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31075.