Nozzle
Definition
A short tubular piece, cylindrical or conical in shape, attached to the end of a pipe, container, or technical device, having the structural role of altering flow geometry, regulating flow rate, and accelerating the discharge velocity of a fluid jet (liquid or gas) by converting pressure energy into kinetic energy. This highly precise hydraulic component is widely used in engineering, ranging from industrial burner nozzles and internal combustion engine injection systems to hydraulic turbines and spraying devices, determining mixing efficiency and precise flow direction.
Bilingual Equivalents
- Nozzle
- Mouthpiece
Grammatical & Source Details
| Inflection Type | Neuter noun with standard structural variations for plural and genitive cases. |
| Formation | Neological borrowing from the French noun 'ajutage', morphologically integrated into Romanian technical lexicons. |
| Spelling / Pronunciation | [a.ʒus.ˈtaʒ] |
| Source | Encyclopedia of Modern Fluid Mechanics and Thermal Power Systems |
Contextual Usage Examples
RO: Inginerul a înlocuit vechiul ajutaj al arzătorului cu unul conic pentru a optimiza arderea gazului.
EN: The engineer replaced the burner's old nozzle with a conical one to optimize gas combustion.
RO: Măsurarea debitului s-a realizat prin montarea unui ajutaj cilindric calibrat direct pe conducta principală.
EN: Flow measurement was performed by mounting a calibrated cylindrical nozzle directly onto the main pipe.
RO: Din cauza impurităților din combustibil, un ajutaj al sistemului de injecție s-a blocat parțial în timpul testelor.
EN: Due to fuel impurities, an injection system nozzle became partially blocked during testing.
Idioms & Phrases
Ajutaj convergent / Convergent nozzle
RO: Piesă tubulară a cărei secțiune transversală descrește treptat în sensul curgerii, utilizată pentru accelerarea fluidelor subsonice.
EN: A tubular piece whose cross-section gradually decreases in the direction of flow, used to accelerate subsonic fluids.
Ajutaj de pulverizare / Spray nozzle
RO: Dispozitiv terminal conceput pentru a fragmenta un jet compact de lichid în picături fine dispersate sub formă de ceață.
EN: A terminal device designed to break a compact liquid jet into fine droplets dispersed in the form of a mist.
Ajutaj Borda / Borda mouthpiece / re-entrant nozzle
RO: Tip special de ajutaj cilindric scurt care proemină în interiorul rezervorului, având un coeficient specific de contracție a jetului.
EN: A special type of short cylindrical nozzle that extends into the interior of the reservoir, having a specific jet contraction coefficient.
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