Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Swirl Number Selection for Reduction of Various Forms of Jet Noise
Categories for this Invention
Categories: Aerospace & Defense Technologies | Applied Mechanics & Mechanical Engineering
Industry: Aviation, Aeroacoustics, Aerospace, and Fluid Dynamics industries
Applications: Jet Engines, Aerospace, Pipe Jets, Non-circular Jets, Impinging Jets
Market: The global Jet Engines market size was $76510 Mn in 2021, is projected to touch $139852 Mn by 2031, growing at 6.2% CAGR in the period of 2021-2031. Further, the global Aerospace market size was estimated at $322 Bn in 2022 and is projected to reach around $678 Bn by 2032, growing at 7.8% CAGR in the period of 2022 to 2032.
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Problem Statement
- High-speed jet flows, like those in jet engines, generate excessive noise during take-off & landing posing social, health, structural concerns.
- Existing noise reduction methods, including passive devices & active control, result in thrust loss and provide limited noise reduction, without effectively addressing the root cause.
- While prior art employs various devices, a comprehensive solution using a co-axial swirler is needed to balance noise reduction & thrust preservation.
- Hence, the present disclosure is in need to effectively reduce jet noise.
Technology
The instant invention disclosed revolves around a novel approach to reducing noise in various jet applications, precisely:
- A jet noise suppressor in a jet engine having a jet center longitudinal axis, comprising of a nozzle, a downstream end to discharge engine flow and a co-axial vane swirler of a suitable swirl number before the downstream end.
The swirl number (S) is determined by equation:
Where,
Ds- swirl jet diameter,
Dh- internal hub diameter,
𝜃 – vane angle
Key Features / Value Proposition
- Offers a unique co-axial swirler design with tailored vane configurations
- Enables effective noise reduction in jet engines and various fluid dynamics applications.
- Versatile Applicability provides solution for noise suppression & enhanced mixing.
- By emphasizing swirl number optimization, it strikes a balance between noise reduction and engine performance, ensuring efficient operations in various industries.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Srinivasan K
Department of Mechanical Engineering
Intellectual Property
IITM IDF No.: 1350
IP No.: 454509 (Granted)
Technology Readiness Level
TRL-4
Validated in Laboratory