TPT Gerät zur Druckverteilung in Düsen

The Nozzle Pressure Distribution Unit, "TPT", allows to investigate the pressure distribution and the mass flow rate in nozzles (convergentdivergent and convergent nozzles).

The unit includes three types of nozzles:

• Convergent type (conical) nozzle, with six pressure tappings.
• Convergent-divergent nozzle, with five pressure tappings.
• Convergent-divergent nozzle, with eight pressure tappings.

The nozzles are made of brass and have been mechanized accurately. Several pressure tapping are available, being each one connectedto its own manometer.

Compressed air supplied from an external service must be provided to the unit. This air passes through an air filter and pressure regulator to provide constant pressure, clean and water free air to the unit.

In the unit, the air passes through a control valve, which allows an accurate control of the pressure at the inlet of the nozzle. The inlet pressure and inlet temperature are measured and then the air is expanded through the chosen nozzle. When discharging from the nozzle, the pressure is controlled by other valve, and finally the air goes through a flowmeter to the atmosphere. The outlet pressure and outlettemperature are measured before the air passes through the flowmeter.

The unit includes ten manometers: two manometers to indicate the inlet and outlet pressure of the air and the rest to indicate the pressure on the measuring points of the nozzles.

Two thermometers to indicate the air temperature are included.