Técnico

Universidade de Lisboa
LABORATORIES

LH – LABORATORY OF HYDRAULICS

The Hydraulics Laboratory (LH) provides essential support to Teaching, Research & Development activities. Its area is approximately 600 m2 and it accommodates 7 flumes and 5 pressurized pipe systems. Four flumes are supplied by a central recirculating system including a 50 m3 reservoir, a centrifugal pump (up to 70 l/s) and the associated pressurized piping circuit.

MAIN EQUIPMENT

TEACHING CHANNEL

This is a 5.0 m long, 0.30 m wide and 0.40 m high didactic tilting flume equipped with accessories for the generation of different backwater profiles.

HYDRAULIC STRUCTURES CHANNEL

This is a 8m long, 0.70 m wide and 0.80 m high horizontal flume, with glass side walls, equipped with flap gates immediately up and downstream the flume.

WAVE CHANNEL

This is a 20 m long, 0.70 m wide and 1.00 m high wave channel equipped with a wave generator able to produce regular and irregular waves with frequencies between 0.05 Hz and 1.5 Hz, equipped with resistive probes.

CRIV: RECIRCULATING AND TILTING HYDRAULICS FLUME

CRIV is a 12.5 m long, 0.41 m wide and 0.50 m high prismatic glassed walls channel with adjustable slope. It includes a water and sediment recirculation circuit.

CONFLUENCE CHANNEL

It includes the main channel (MC) and a tributary channel (TC). The MC is 10.0 m long, 1.00 m wide and 0.70 m high. The TC is 4.0 m long, 0.50 m high and adjustable width. It is equipped with conveyor belts for feeding and an automated transverse system.

POOL-TYPE FISHWAY

This is a 1/2.5 scaled model of a real fishway. The channel is 5.70 m long, 0.40 m wide and 0.50 m high; it is a tilting flume made of a steel frame and glass side walls and it includes a recirculating water circuit.

STEEP SLOPE FLUME

This is a 3.50 m long, 0.50 m wide and 0.50 m high steel flume with adjustable slope up to 26.5%. It includes a water recirculating circuit and it is equipped with a hopper and a conveyor belt for coarse sediment feeding.

TEST-RIG FOR SMALL-POWER PUMPS AND TURBINES

Closed reversible circuit composed of steel pipes with diameters between 50 and 200 mm for testing small-power reaction turbo machines in transient and in steady state conditions Fully instrumented and equipped with a state-of-the-art data acquisition system.

CHLORINE DECAY TEST-RIG

A closed PE pipe coils, 100 m long, 32 mm diameter used for modelling chlorine decay in water pipe systems, namely the analysis of effect of temperature and turbulence on the bulk decay coefficient.

WATER HAMMER TEST-RIG I

Copper pipe coil with 103 m and 20 mm diameter, with a centrifugal pump and control valves. Developed for measuring hydraulic transient pressures generated by pump’s trip-off and valve’s manoeuvres. Fully equipped for acquiring high frequency pressure variations.

WATER HAMMER TEST-RIG II

Straight pipe, 15 m long, 20 mm diameter for measuring transient pressures generated by valve’s manoeuvres. Fully equipped for acquiring high frequency hydraulic and mechanical properties.

WATER HAMMER TEST-RIG III

PE pipe coils with 200 m of length, 50mm of diameter, with hydro-pneumatic vessel at upstream and valves at downstream, for analysing transients generated by valve’s manoeuvres in viscoelastic pipes and in pipe systems with leaks.

COMPRESSED AIR VOLUME SYSTEM

Compressed air volume system (CAV) to study the behavior of entrapped air during pipe filling and under transient conditions. This system is composed of two hydro-pneumatic vessels, one CAV, a pump with maximum nominal head of 28.2 m and nominal power of 4 kW and control valves.

PIV – PARTICLE IMAGE VELOCIMETRY

PIV (Particle Image Velocimetry) is a laser based technique to acquire velocity fields at a maximum frequency of 15 Hz, composed of a 1600×1200 CCD camera synchronized with a 30 mJ, 532 nm laser.

ADV – ACOUSTIC DOPPLER VELOCIMETRY

ADV: Acoustic Doppler for point wise measurement of 3D velocity; composed of a down-looking and aside-looking probes (200 Hz max; control vol 1.5-7 mm) and a VCM for field applications (8 Hz max; control vol 15 mm).

UVP – ULTRASONIC VELOCITY PROFILER

UVP: acoustic probes for measuring velocity profiles and water and bottom levels; composed of 1 UVP system with 2 probes of 2 MHz and 4 MHz.

LIMNIMETER

Limnimeters: 10 ultrasonic distance measuring sensors UNDK30U6103/S14 with sensing range 100-700 mm, repeatability < 3 mm and response time <5 ms. Used to measure bed and water surface levels.

3D AUTOMATED TRANSVERSE SYSTEM

3D automated transverse system equipment moves longitudinally, transversely and vertically to the channel, allowing automatic measurements. It is controlled by Conflume, a specifically developed software.

MINI-ECHO-SOUNDER

Two Mini-Echo-Sounders (UltraLab UWS) to measure bathymetry, erosion and sedimentation without emptying the model. It measures distances in water from 2 cm up to 15 m with 1 mm-accuracy and 1 MHz-acquisition rate.

TP5B – FIVEBLADE TUBULAR PROPELLER

TP5B was design at LH to study the efficiency of micro-energy production with a maximum turbine flow of 12 l/s. The installation of micro turbines is particularly attractive for water supply systems.

RESEARCH & DEVELOPMENT ACTIVITIES

  • Fluid-structure interaction in pressure flows
  • Hydropower and efficiency in water systems
  • Power generation by water hammer
  • Local scour at complex bridge piers
  • Hydropeaking and shelter configurations on the behavior of cyprinids
  • Hydropeaking and shelter configurations on the behavior of cyprinids
  • Morphodynamics of river confluences and diversion channels
  • Hydrodynamics of turbulent flows within vegetated boundaries
  • Mechanics of granular media in 3D turbulent flows

CONSULTANCY ACTIVITIES

  • Slit check-dams for the mitigation of debris flows in Madeira Island

STAFF