Experimental analysis of multi-horizontal submerged jets energy dissipater

Moradi, Mehrdad; Sajjadi, Mohsen; Balachandar, Ram; Arman, Ali; Ilinca, Adrian

doi:10.1080/09715010.2021.1885508

Cited by 3 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, sediment deposits (which were formerly located near the port's entry) have shifted to its southern portions (Figure 21). Furthermore, the rotatory flow contributes to higher bed shear stress [34], thereby escalating erosion, especially notable in the southern regions of the original port layout. However, this rotatory flow has been eliminated in the modified port layout, reducing erosion in that part.…”

Section: The Impact Of Harbour Layout On Near Port Current Speed and ...mentioning

confidence: 99%

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Moradi,

Ilinca

2024

Energies

View full text Add to dashboard Cite

In the face of depleting fossil energy and the imperative of sustainable development, there is a compelling drive towards advancing renewable energies. In this context, sustainable and predictable alternatives, like marine energy, gain prominence. Marine energy presents a cleaner option devoid of the adverse effects associated with fossil fuels, playing a crucial role in environmental sustainability by safeguarding coastlines against erosion. This study focuses on Astara Port in the Caspian Sea, exploring the utilization of wave energy converters (WECs). The originality of this study’s research lies in exploring WECs’ dual role in energy generation and coastal protection. Using MIKE21 software simulations, the impact of number, location, arrangement, and orientation of WECs across various scenarios was investigated, including two WEC number scenarios (11 and 13), three structural placement scenarios (north, front, and south of the port), two structural arrangement scenarios (linear and staggered), two port layout scenarios (original layout and modified layout), and two orientation scenarios for the structures (facing north-east, which is the dominant wave direction, and facing southeast). The results show a remarkable decrease in the significant wave height behind WECs, notably with 13 staggered devices facing dominant waves (from northeast), reducing the significant wave height Hs by 23–25%. This setup also shows the highest wave height reduction, notably 36.26% during a storm event. However, linear WEC setup offers more extensive coastline protection, covering 47.88% of the model boundary during storms. Furthermore, the 11 staggered WECs facing southeast (SE) arrangement had the lowest sediment accumulation at 0.0358 m over one year, showing effective sedimentation mitigation potential. Conversely, the 13 linear WECs facing northeast (NE) had the highest accumulation at 0.1231 m. Finally, the proposed port design redirects high-velocity flow away from the port entrance and removes rotatory flow, reducing sediment accumulation near the harbor entrance.

show abstract

Section: The Impact Of Harbour Layout On Near Port Current Speed and ...mentioning

confidence: 99%

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Moradi,

Ilinca

2024

Energies

View full text Add to dashboard Cite

show abstract

“…Chen et al [ 9 ] analyzed the velocity and water depth of multi-horizontal submerged jets stilling basin in different scale models through experiments and concluded that the time-averaged hydraulic characteristics in the stilling basin were less impacted by the scale. To analyze the three-dimensional structure of submerged jets and evaluate the influence of downstream submerged flow field, laboratory velocity measurements were carried out by Moradi et al and the results show that the Reynolds shear stress and vorticity increase with the increase of jet depth [ 10 ]. Zhou et al [ 11 ] conducted experimental and numerical studies on a new partial FGP scheme and found that the partial FGP scheme (the alternation of flaring and no flaring gate piers in chambers) can effectively suppress the inundated hydraulic jump and high-speed water jet in the upstream area of the stilling pool.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on characteristics of vortex dissipation in multi-horizontal submerged jets stilling basin

Hu,

Yang,

Yuan

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

Multi-horizontal submerged jets stilling basins have been utilized in large-scale water conservancy and hydropower projects due to its stable flow pattern, high energy dissipation rate and less atomization. This study employs vorticity criterion, Q criterion, λ2 criterion and Ω criterion to investigate the characteristics of vortex formation and turbulent dissipation in multi-horizontal submerged jets stilling basins with various configurations, including crest overflowing orifice alone (COO), combination of crest overflowing orifice and mid-discharge orifice (COO-MO) and mid-discharge orifice alone (MO). The results indicate that the Q criterion and λ2 criterion are effective in identifying vortex structure within multi-horizontal submerged jets stilling basin. Specifically, the stronger intensity of vortex structure and vortex dissipation are mainly distributed in the vicinity of the vertical drop, which gradually weakens for the increasing distance to the vertical drop. Furthermore, the intensity and number of vortexes with COO-MO are the largest. This conclusion can provide guidance for energy dissipation and bottom protection of stilling pool.

show abstract

“…According to the results, the water jets installed at the bottom of the channel decreased the hydraulic jump length by 59%, and the jump efficiency improved to 85.4% compared to the non-jetted system. Moradi et al (2022) conducted an experimental study on 3-dimensional velocity distribution in stilling basins with horizontal submerged jets. They concluded that increasing the jet's submergence leads to an increase in shear stress and the size of the vortices.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Experimental study of spatial hydraulic jump stabilization using lateral jet flow

et al. 2022

View full text Add to dashboard Cite

The present experimental study analyzes the effects of lateral jet flow (LJF) in a stilling basin with abruptly expanding channels on the stabilization and the significant characteristics of spatial hydraulic jump. The experiments were carried out with three different inflow Frude number (8.77,9.56,and 10.87), three different distances of the LJF from the abruptly expanding channel (0 m, 0.25 m, and 0.5 m), and one and two LJF (i.e., the number of active orifices in the LJF system). According to the results, both distances of the LJF from the narrow channel and the number of LJF improve the hydraulic jump's stabilization and flow pattern enhancement in the tailwater channel. Additionally, the average sequent depth and the spatial jump length decreased by 14 and 20%, respectively, compared to no LJF. Also, using LJF increases relative energy dissipation by 12.45% on average.

show abstract

Experimental analysis of multi-horizontal submerged jets energy dissipater

Cited by 3 publications

References 28 publications

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Numerical investigation on characteristics of vortex dissipation in multi-horizontal submerged jets stilling basin

Experimental study of spatial hydraulic jump stabilization using lateral jet flow

Contact Info

Product

Resources

About