What is it about?
This study focuses on studying an oxidizer-centered pintle injector engine fueled with gaseous methane (GCH4) and liquid oxygen (LOx), utilizing two rows of radial rectangular slots. In particular, we investigate the impact of varying the mass flow rate ratio between two rows of radial injectors on the flame topology and combustion efficiency.
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Why is it important?
Previous research highlighted that the injector provides maximum performance when the mass flow rate of the first row is approximately 80% of the total. However, while this result is widely accepted, very few recent studies have fully assessed the effect of this parameter. Moreover, although the mass flow rate ratio between the two rows is theoretically directly proportional to the area ratio of the openings, in reality, it strongly depends on the design and pathways of the internal conduits of the injector. This leads to uncertainty in determining the actual mass flow rate ratio between the injectors, which is important to assess as it strongly influences the flow structure inside the chamber, the thermal load problem, and the combustion efficiency
Perspectives
The findings of this study not only shed light on the intricate relationship between the mass flow rate ratio and overall pintle injector performance but also contribute to the ongoing efforts in advanced design and operation strategies for various combustion and propulsion applications.
Leandro Lucchese
Universita degli Studi di Roma La Sapienza
Read the Original
This page is a summary of: Pintle Injector Performance Sensitivity to the Radial Injection Arrangement, January 2024, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2024-1393.
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