What are the types of fuel injector nozzles?
What are the types of fuel injector nozzles?
Types of Nozzle in IC Engine : Pintle Nozzle, Single Hole Nozzle, Multihole Nozzle, Pintaux Nozzle.
What are the requirements of a nozzle in a fuel injector?
Introduction. Design of the diesel fuel injector nozzle is critical to the performance and emissions of modern diesel engines. Some of the important injector nozzle design parameters include details of the injector seat, the injector sac and nozzle hole size and shape.
How does a diesel injector nozzle work?
Diesel Injector Nozzle Operation The fuel flows down through a fuel passage in the injector body and into the pressure chamber. The high fuel pressure in the pressure chamber forces the needle valve upward, compressing the needle valve return spring and forcing the needle valve open.
Which is not the type of nozzle used in diesel fuel injector?
Explanation: The circumferential hole nozzle is used in open type combustion chambers and single or multi hole nozzle are not used.
What liquid is used in rocket engines?
liquid hydrogen
Today, liquid hydrogen is the signature fuel of the American space program and is used by other countries in the business of launching satellites. In addition to the Atlas, Boeing’s Delta III and Delta IV now have liquid-oxygen/liquid-hydrogen upper stages.
What is a pintle nozzle injector?
The pintle injector is a type of propellant injector for a bipropellant rocket engine. Pintle injectors began as early laboratory experimental apparatuses, used by Caltech’s Jet Propulsion Laboratory in the mid-1950s, to study the mixing and combustion reaction times of hypergolic liquid propellants.
What are the parts of nozzle?
WHIRL CHAMBER
- WHIRL CHAMBER.
- The whirl chamber is the nozzle part where the liquid to be atomized, fed under pressure, is given a rotational speed which allows the centrifugal forces to generate the spray cone at the exit of the nozzle orifice.
- NOZZLE ORIFICE.
Why is the fuel injector nozzle important in diesel engines?
Abstract: The fuel injector nozzle is critical to the performance and emissions of diesel engines.
What is the fuel injection process in a diesel engine?
The fuel injection process is important for the combustion and emission formation in the diesel engine. The fuel injector has to atomize and vaporize the fuel as it is injected.
Do all fuel nozzles have to produce a fuel spray?
All nozzles must produce a fuel spray that meets the requirements of the performance and emissions goals of the market for which the engine is produced regardless of details of the fuel system design (i.e., regardless if the fuel system is of the common rail, unit injector, unit pump or pump-line-nozzle type).
Why does cavitation occur in a diesel injection nozzle?
Very strong pressure gradients are present in a modern diesel injection nozzle, this causes cavitation to occur in the nozzle holes. The influence of cavitation on flow parameters such as the various discharge coefficients is discussed.
