Pintle nozzles operate with lower nozzle opening pressure than which other type of nozzle?

Pintle nozzles are designed to operate with lower nozzle opening pressures compared to multi-orifice nozzles, primarily due to differences in their design and function. Pintle nozzles utilize a single-opening design that allows fuel to be injected more easily at lower pressure. This design is particularly effective in providing a more uniform spray pattern, which is beneficial for combustion efficiency.

In contrast, multi-orifice nozzles require higher opening pressures to ensure that fuel can be atomized through multiple small orifices. This increased pressure is necessary to achieve adequate fuel flow and proper atomization, which results in a more dispersed fuel spray essential for effective combustion in certain engine applications.

This fundamental difference in operation highlights why pintle nozzles can function at lower pressures, making them advantageous in specific scenarios where efficient fuel delivery is a priority without requiring high pressure for adequate atomization, unlike multi-orifice nozzles that depend on a higher pressure to perform optimally.