What are the two basic types of fuel nozzles?

What are the two basic types of fuel nozzles?

• A. Simplex configurations
• B. Duplex configurations
• C. Duplex and simplex configurations
• D. Simplex and duplex configurations

Answer: (D)

Fuel nozzles come in two basic configurations based on the number of spray elements they contain. A simplex nozzle uses a single spray element and one aperture, delivering fuel through one path and producing a single spray pattern. A duplex nozzle has two spray elements or two separate spray paths, providing two sprays or a two-stage spray. This dual arrangement improves fuel atomization and distribution in the combustion chamber, helping with more consistent combustion across different operating conditions and supporting pilot and main injections when used. So, the two fundamental types are simplex and duplex configurations.

Fuel nozzles come in two basic configurations based on the number of spray elements they contain. A simplex nozzle uses a single spray element and one aperture, delivering fuel through one path and producing a single spray pattern. A duplex nozzle has two spray elements or two separate spray paths, providing two sprays or a two-stage spray. This dual arrangement improves fuel atomization and distribution in the combustion chamber, helping with more consistent combustion across different operating conditions and supporting pilot and main injections when used. So, the two fundamental types are simplex and duplex configurations.