FM-109 | Nozzle Pressure Distribution Unit

The experimental unit is used to measure pressure curves in convergent and convergent-divergent nozzles to study the actual flow of compressible fluids. In addition, the “choking effect” is demonstrated, where the mass flow rate stops increasing upon reaching the critical pressure ratio. Air is used as a compressible fluid. In the experiment, the air flows through a nozzle and is thus accelerated. The pressure curve is recorded in the direction of flow over several measuring points. The air pressure upstream and downstream of the nozzle can be adjusted. Five interchangeable nozzles are available to study the pressure and velocity ratios: convergent contour and convergent-divergent nozzles with different length nozzle extensions. The measured values for temperatures, pressures and mass flow rate are recorded.

Data Acquisition System

• Instrumented and computer controlled via USB / Ethernet interface / WiFi to record related calculations.
• The data are stored in a data base either in file format supported by third party software.
• Digital calculation of pressure, temperature and mass flow rate at various points in a compressible flow
• Microcontroller based data acquisition software (Computer not included)