The apparatus is suitable for the demonstration of cavitation processes using the example of a Venturi nozzle. Pressure energy is converted into kinetic energy and vice versa in the Venturi nozzle. Vapour bubbles form in the narrowest cross-section.

To visualize the flow processes the experimental unit includes a Venturi nozzle made of transparent plastic. There are three pressure measuring points on the Venturi nozzle: at the inlet, at the narrowest point and at the outlet. The input pressure can be adjusted via a pressure reducing valve. The flow rate and the pressures can be adjusted via two ball valves which are located at the inlet and outlet of the pipe system.

The pressure distribution within the Venturi nozzle is shown on three manometers. The flow can be read off a Rotameter. The temperature is measured directly upstream of the Venturi nozzle and is displayed on the thermometer.

TECHNICAL DETAILS

Pressure reducing valve

· 0.5…2bar

· up to 70°C Transparent Venturi nozzle

· cross-section of flow

· inner diameter: 18mm

· contraction: 10.5° output cross-section

· inner diameter: 18mm

· enlargement: 4° narrowest cross-section

· inner diameter: 3.5mm
Measuring ranges

· pressure: -1…1.5bar

· temperature: 0…60°C

· flow rate: 0…1000L/h