Effects of the bottom slope and guiding wall length on the performance of a vortex drop inlet

Dong Sop Rhee, Yong Sung Park, Inhwan Park (Lead / Corresponding author)

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Laboratory experiments were conducted to assess the performance of a vortex drop inlet with a spiral intake in subcritical and supercritical flow conditions. The water surface elevation at multiple locations was measured for different flowrates by varying the extent of the guiding wall and the longitudinal and radial bottom slopes. The measurements show that a steeper longitudinal bottom slope decreases the water surface elevation at the beginning of the intake, resulting in a transcritical flow in the intake structure. However, a steeper longitudinal bottom slope also causes the maximum water surface elevation to occur within the spiral intake. For an effective vortex drop inlet design, achieving a low water surface elevation throughout the entire spiral intake structure is required. Experimental results show that the two seemingly conflicting design criteria, namely, achieving a low water surface elevation in the approach channel and reducing the maximum water surface elevation in the intake structure, can be simultaneously achieved by adding a radial bottom slope.

Original languageEnglish
Pages (from-to)1287-1295
Number of pages9
JournalWater Science and Technology
Volume78
Issue number6
DOIs
Publication statusPublished - 2 Nov 2018

Fingerprint

vortex
Vortex flow
surface water
Water
supercritical flow
effect
Experiments

Keywords

  • choking
  • guiding wall
  • longitudal bottom slope
  • raidial bottom slope
  • vortex drop inlet

Cite this

Rhee, Dong Sop ; Park, Yong Sung ; Park, Inhwan. / Effects of the bottom slope and guiding wall length on the performance of a vortex drop inlet. In: Water Science and Technology. 2018 ; Vol. 78, No. 6. pp. 1287-1295.
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Effects of the bottom slope and guiding wall length on the performance of a vortex drop inlet. / Rhee, Dong Sop; Park, Yong Sung; Park, Inhwan (Lead / Corresponding author).

In: Water Science and Technology, Vol. 78, No. 6, 02.11.2018, p. 1287-1295.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of the bottom slope and guiding wall length on the performance of a vortex drop inlet

AU - Rhee, Dong Sop

AU - Park, Yong Sung

AU - Park, Inhwan

N1 - This study was supported by the grant (17CTAP-C095650-03) from Infrastructure and Transportation Technology Promotion Program funded by Ministry of Land, infrastructure, and Transport of Korean government.

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Y1 - 2018/11/2

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AB - Laboratory experiments were conducted to assess the performance of a vortex drop inlet with a spiral intake in subcritical and supercritical flow conditions. The water surface elevation at multiple locations was measured for different flowrates by varying the extent of the guiding wall and the longitudinal and radial bottom slopes. The measurements show that a steeper longitudinal bottom slope decreases the water surface elevation at the beginning of the intake, resulting in a transcritical flow in the intake structure. However, a steeper longitudinal bottom slope also causes the maximum water surface elevation to occur within the spiral intake. For an effective vortex drop inlet design, achieving a low water surface elevation throughout the entire spiral intake structure is required. Experimental results show that the two seemingly conflicting design criteria, namely, achieving a low water surface elevation in the approach channel and reducing the maximum water surface elevation in the intake structure, can be simultaneously achieved by adding a radial bottom slope.

KW - choking

KW - guiding wall

KW - longitudal bottom slope

KW - raidial bottom slope

KW - vortex drop inlet

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JO - Water Science and Technology

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ER -