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Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
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Experimental flow characterization in a spiral vortex drop shaft.

João Fernandes1, Ricardo Jónatas1

  • 1National Laboratory for Civil Engineering Lisbon, Portugal

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|September 21, 2019
PubMed
Summary

Vortex drop shafts efficiently dissipate energy in connecting storm-sewers at different elevations. This study experimentally characterized flow within spiral vortex drop shafts, measuring key hydraulic parameters.

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Area of Science:

  • Environmental Engineering
  • Fluid Mechanics
  • Hydraulic Engineering

Background:

  • Connecting storm-sewers at varying elevations requires effective energy dissipation structures.
  • Vortex drop shafts, particularly the spiral type, are utilized for energy dissipation in supercritical flow conditions.
  • These structures must balance performance with spatial constraints.

Purpose of the Study:

  • To conduct an experimental flow characterization of spiral vortex drop shafts.
  • To analyze the hydraulic performance of the inlet channel, vertical shaft, and dissipation chamber.
  • To provide data on water depths, pressure, and velocity within the shaft.

Main Methods:

  • Experimental investigation of a spiral vortex drop shaft model.
  • Measurement of hydraulic parameters including water depth, pressure, and velocity.
  • Analysis of flow dynamics across the three primary components: inlet, shaft, and chamber.

Main Results:

  • Detailed flow characteristics were obtained for the spiral vortex drop shaft.
  • Measurements provided insights into energy dissipation mechanisms.
  • Performance data relevant to supercritical flow conditions was collected.

Conclusions:

  • The study provides valuable experimental data for understanding spiral vortex drop shaft hydraulics.
  • Findings can inform the design and optimization of these structures for storm-sewer systems.
  • The research contributes to the efficient management of hydraulic energy in civil infrastructure.