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Hydromechanics Laboratory
Hydromechanics lab

Facilities

Water Channel

The Hydromechanics Lab now has two water channel facilities. 

Large channel:

The large circulating water channel has a free surface and is used mainly for cavitation and flow visualization studies.  It is also used for the measurement of forces and pressure distribution on hydrofoils, rudders and submerged bodies. The test section pressure can be varied from +5 to -10 psi (+35 to -70 kpa) which allows demonstration of cavitation effects on propellers and hydrofoil sections at lower speeds.

TEST SECTION: 1.3 ft x 1.3 ft x 5 ft (0.41 m x 0.41 m x 1.5 m)

DESCRIPTION OF FACILITY:

Vertical closed loop with, free surface test section

TYPE OF DRIVE SYSTEM AND TOTAL MOTOR POWER:

4-bladed axial flow impeller; 75 HP (56 kw), 1750 rpm

INSTRUMENTATION:

Water velocity via Pitot tube or contraction, static and dynamic pressures, propeller RPM, forces

TESTS PERFORMED:

Cavitation and flow visualization, force, moment and pressure distribution on hydrofoils, rudders and submerged bodies

Small channel:

The smaller water channel has two interchangeable test sections.  One was optimized for low turbulence which allows detailed studies of flow within the boundary layer.  The other was optimized for evaluating the friction of test surfaces using static pressure measurements along the length of the test section.

DESCRIPTION OF FACILITY:

Vertical closed loop, closed surface

TYPE OF DRIVE SYSTEM AND TOTAL MOTOR POWER:

Two centrifugal impeller pumps, 5 HP each 1750 rpm, 10 HP Total (7.5 kw)

INSTRUMENTATION:

Particle Image Velocimeter (PIV), Laser Doppler Velocimeter (LDV), pressure measurement

TESTS PERFORMED:

Flow studies of boundary layer and around submerged objects, surface friction measurements

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