Performance Enhancement of a Ramjet Air Intake by Passive Bleed of Boundary Layer

Suryanarayana, GK; Dubey, Ritukanchan

doi:10.2514/1.a34258

Cited by 12 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Implementing small ventilation gaps along the intake, the internal viscous flow is bypassed to ambient conditions, improving the air flowing toward the engine face. The present technique was employed by Suryanarayana et al [119,120] on a two-dimensional intake model with a Mach number range of 1.8-3.0. Their study demonstrates the successful postponement of the buzz phenomena under both design and off-design conditions, accompanied by a substantial improvement in total pressure recovery.…”

Section: Boundary Layer Bleedmentioning

confidence: 99%

Aerodynamic Instabilities in High-Speed Air Intakes and Their Role in Propulsion System Integration

Philippou,

Zachos,

MacManus

2024

Aerospace

View full text Add to dashboard Cite

High-speed air intakes often exhibit intricate flow patterns, with a specific type of flow instability known as `buzz’, characterized by unsteady shock oscillations at the inlet. This paper presents a comprehensive review of prior research, focused on unraveling the mechanisms that trigger buzz and its implications for engine stability and performance. The literature survey delves into studies concerning complex-shaped diffusers and isolators, offering a thorough examination of flow aerodynamics in unstable environments. Furthermore, this paper provides an overview of contemporary techniques for mitigating flow instability through both active and passive flow control methods. These techniques encompass boundary layer bleeding, the application of vortex generators, and strategies involving mass injection and energy deposition. The study concludes by discussing future prospects in the domain of engine-intake aerodynamic compatibility. This work serves as a valuable resource for researchers and engineers striving to address and understand the complexities of high-speed air induction systems.

show abstract

Section: Boundary Layer Bleedmentioning

confidence: 99%

Aerodynamic Instabilities in High-Speed Air Intakes and Their Role in Propulsion System Integration

Philippou,

Zachos,

MacManus

2024

Aerospace

View full text Add to dashboard Cite

show abstract

“…The study stated that the bleed system is known for having a minimal separation bubble in the isolator. Suryanarayana and Dubey [10] studied Passive Bleed of Boundary Layer optimization for a ramjet air inlet. The results showed that a 1.6 mm gap provided the best efficiency, although all gap structures improved overall pressure recovery and mass flow rate.…”

Section: Introductionmentioning

confidence: 99%

Ses Üstü Hava Alığında Sınır Tabaka – Şok Etkileşiminin Plenum Optimizasyonu ile Kontrolü

TÜRKKAHRAMAN,

ÖZCAN,

ALABAŞ

2023

Journal of Polytechnic

View full text Add to dashboard Cite

In the developing world, the importance of supersonic flights is increasing day by day, especially in military fields. Since supersonic flights have different physical conditions, different designs are required both in the fuselage structure and in the engine part compared to subsonic aircraft. In these studies, the air inlet performance of jet engines designed for supersonic flights is investigated. A plenum has been added to the air inlet geometry in line with the goal of low flow distortion and high pressure recovery. Then, the optimum plenum geometry design was obtained by applying a two-stage optimization process. In each optimization step, computational fluid dynamics analyses were performed to define the effects of the changes in the geometric dimensions of the plenum design and bleed system on the PR (Pressure Recovery) and FD (Flow Distortion) values. The outcome of the analysis showed that the addition of the plenum and the bleed system improved the performance of the air inlet. The new plenum design that emerged as a result of the optimization processes has positively affected the performance values of the air intake. Analysis results showed higher PR and lower FD results in optimized geometry.

show abstract

Experimental study of high-speed air intake performance by side clearance

Ogura

Fujii

Hoshiya

et al. 2022

Aerospace Science and Technology

View full text Add to dashboard Cite

Performance Enhancement of a Ramjet Air Intake by Passive Bleed of Boundary Layer

Cited by 12 publications

References 15 publications

Aerodynamic Instabilities in High-Speed Air Intakes and Their Role in Propulsion System Integration

Aerodynamic Instabilities in High-Speed Air Intakes and Their Role in Propulsion System Integration

Ses Üstü Hava Alığında Sınır Tabaka – Şok Etkileşiminin Plenum Optimizasyonu ile Kontrolü

Experimental study of high-speed air intake performance by side clearance

Contact Info

Product

Resources

About