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International Journal for Research Trends and Innovation
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ISSN Approved Journal No: 2456-3315 | Impact factor: 8.14 | ESTD Year: 2016
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Issue: May 2026
Volume 11 | Issue 5
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Impact Factor : 8.14
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| Paper Title: | COMPARISON OF PINTLE AND POROUS INJECTOR FOR LIQUID ROCKET ENGINE |
| Authors Name: | Marri Rahul Sri Harman , Dadi Manikanta Varma , Dusa Prem Kumar , V Phaninder Reddy |
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IJRTI_211626
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| Published Paper Id: | IJRTI2604205 |
| Published In: | Volume 11 Issue 4, April-2026 |
| DOI: | |
| Abstract: | Injectors govern the fundamental processes of atomization and mixing in liquid rocket engines, directly influencing combustion efficiency, flow stability, and overall engine performance. This study presents a comprehensive comparative analysis of pintle and porous injectors using computational fluid dynamics (CFD) simulations under identical operating conditions. The investigation focuses on key performance parameters, including velocity distribution, pressure drop characteristics, atomization behavior, and flow uniformity. The results reveal that porous injectors promote highly uniform flow distribution and fine-scale atomization due to the distributed injection through multiple micro-pores, resulting in enhanced mixing efficiency. However, this mechanism introduces a significant pressure drop across the porous medium, which influences flow regulation and system stability. In contrast, pintle injectors exhibit strong macroscopic mixing through impingement and recirculation, while maintaining a relatively constant pressure drop, making them highly suitable for deep throttling applications. Further analysis highlights the dependence of combustion efficiency on droplet size and operating conditions, demonstrating that both injector types exhibit distinct instability mechanisms under extreme regimes. Pintle injectors are susceptible to atomization-driven instabilities at low momentum conditions, whereas porous injectors show sensitivity to low pressure drop and high momentum flux conditions. Overall, the study provides a unified physical interpretation of the performance trade-offs between pintle and porous injectors, offering valuable insights for injector selection and the design of advanced liquid propulsion systems. |
| Keywords: | Pintle injectors, porous injectors, liquid rocket engines, computational fluid dynamics (CFD), atomization, mixing efficiency |
| Cite Article: | "COMPARISON OF PINTLE AND POROUS INJECTOR FOR LIQUID ROCKET ENGINE", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2456-3315, Vol.11, Issue 4, page no.b503-b511, April-2026, Available :http://www.ijrti.org/papers/IJRTI2604205.pdf |
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2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016 An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator |
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Published Paper ID: IJRTI2604205
Registration ID:211626
Published In: Volume 11 Issue 4, April-2026
DOI (Digital Object Identifier):
Page No: b503-b511 Country: HYDERABAD, TELANGANA, INDIA Research Area: Engineering Publisher : IJ Publication Published Paper URL : https://www.ijrti.org/viewpaperforall?paper=IJRTI2604205 Published Paper PDF: https://www.ijrti.org/papers/IJRTI2604205 |
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ISSN: 2456-3315
Impact Factor: 8.14 and ISSN APPROVED,
Journal Starting Year (ESTD) : 2016
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