Experimental investigation of a pintle injector

The pintle injector is a key component in liquid rocket engines, distinguished from conventional injectors by its unique design. Traditional injectors disperse fuel through multiple orifices on an injector plate, ensuring uniform distribution but offering limited control over the propellant flow field. In contrast, the pintle injector operates as a single-unit injector with a simpler structure while significantly influencing the fuel and oxidizer flow dynamics within the combustion chamber. This distinct design results in a fundamentally different flow field, offering several advantages, including enhanced combustion efficiency, improved flow stability, and greater flexibility in engine tuning and testing. One of the main strengths of the pintle injector lies in its ability to create an optimized flow pattern, promoting better mixing between fuel and oxidizer. This not only boosts combustion efficiency but also mitigates potential combustion instabilities. In this study, the performance and characteristics of liquid-liquid pintle injectors are investigated, with a specific focus on cold-flow testing. These tests examine the effects of various parameters on injector performance in a non-combustion environment. Given the advantages of the pintle injector (particularly its potential for reducing design and manufacturing costs) there is a growing need to develop this technology within the aerospace industry. Beyond improving rocket engine performance, pintle injector technology plays a crucial role in enhancing efficiency and minimizing production and development expenses. The findings of this research contribute to the advancement of pintle injector design and performance across various industrial applications.

کلیدواژه ها:

Pintle Injector Cold Test ، Spray Angle ، Combustion Chamber ، Fuel & Oxidizer