calibrated orifice

Under choked conditions, valves and calibrated orifice plates can be used to produce a desired mass flow rate.

Fuel flow is adjusted by means of precisely calibrated orifices, referred to as jets, in the fuel path.

This turns on the fluid pump, which pumps fluid out of the reservoir, through the ducting, and out onto the calibrated orifices on the wing leading edge.

Other types of fluid jets are found in carburetors, where smooth calibrated orifices are used to regulate the flow of fuel into an engine, and in jacuzzis or spas.