A Study on Broad Band Noise Emitted from Underexpanded Radial Jet Article Swipe
Yuichi Hiramoto
,
Hiromasa Suzuki
,
Masaki Endo
,
Yoko SAKAKIBARA
·
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.4236/ojfd.2019.91005
YOU?
·
· 2019
· Open Access
·
· DOI: https://doi.org/10.4236/ojfd.2019.91005
This study focuses on a noise emitted from a radial underexpanded jet. The underexpanded jet is well known as one of supersonic jets and it is formed when the pressure ratio across a convergent nozzle is more than the critical value. The underexpanded jet has been used in many fields, such a propulsion of rocket, laser cutting and a glass tempering process. Such jet is exhausted from a circular nozzle. The expansion wave, the compression wave and the shock wave are periodically formed in the jet, which leads to quasi-periodical shock-cell structure. On the other hand, an underexpanded jet radially issues from intake and exhaust valves of an internal combustion engine and a pressure control valve. The radial underexpanded jet does not have the quasi- periodical shock-cell structure such as the jet from the circular nozzle, its cell length decreasing along jet axis. In this study, an underexpanded jet radially discharged from a circular slit nozzle, which consists of two circular tubes, is experimentally examined for different nozzle pressure ratios. The jet structure is visualized using Schlieren method and a noise emitted from the jet is measured. Typically, the shock associated broadband noise is analyzed and a relation between the jet structure and the radiation noise frequency is discussed. As a result, it is found that the broadband noise lies on lower frequency than a screech tone and that the 1st cell length plays an important role in broadband noise radiation.
Related Topics
Concepts
Nozzle
Jet (fluid)
Physics
Rocket engine
Shock diamond
Supersonic speed
Overall pressure ratio
Shock (circulatory)
Shock wave
Mechanics
Optics
Sound pressure
Jet noise
Acoustics
Materials science
Astrophysics
Bow shock (aerodynamics)
Aerospace engineering
Medicine
Internal medicine
Engineering
Gas compressor
Thermodynamics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.4236/ojfd.2019.91005
- http://www.scirp.org/journal/PaperDownload.aspx?paperID=91140
- OA Status
- diamond
- Cited By
- 1
- References
- 11
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2921538643
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2921538643Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.4236/ojfd.2019.91005Digital Object Identifier
- Title
-
A Study on Broad Band Noise Emitted from Underexpanded Radial JetWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2019Year of publication
- Publication date
-
2019-01-01Full publication date if available
- Authors
-
Yuichi Hiramoto, Hiromasa Suzuki, Masaki Endo, Yoko SAKAKIBARAList of authors in order
- Landing page
-
https://doi.org/10.4236/ojfd.2019.91005Publisher landing page
- PDF URL
-
https://www.scirp.org/journal/PaperDownload.aspx?paperID=91140Direct link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
diamondOpen access status per OpenAlex
- OA URL
-
https://www.scirp.org/journal/PaperDownload.aspx?paperID=91140Direct OA link when available
- Concepts
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Nozzle, Jet (fluid), Physics, Rocket engine, Shock diamond, Supersonic speed, Overall pressure ratio, Shock (circulatory), Shock wave, Mechanics, Optics, Sound pressure, Jet noise, Acoustics, Materials science, Astrophysics, Bow shock (aerodynamics), Aerospace engineering, Medicine, Internal medicine, Engineering, Gas compressor, ThermodynamicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
1Total citation count in OpenAlex
- Citations by year (recent)
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2020: 1Per-year citation counts (last 5 years)
- References (count)
-
11Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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