All-optical, air-coupled ultrasonic detection of low-pressure gas leaks and observation of jet tones in the MHz range
KG Scheuer, RG DeCorby - Sensors, 2023 - mdpi.com
We used an ultrasensitive, broadband optomechanical ultrasound sensor to study the
acoustic signals produced by pressurized nitrogen escaping from a variety of small syringes …
acoustic signals produced by pressurized nitrogen escaping from a variety of small syringes …
Jet noise reduction using co-axial swirl flow with curved vanes
P Balakrishnan, K Srinivasan - Applied Acoustics, 2017 - Elsevier
Experimental studies are carried out to reduce the jet noise using co-axial swirlers in the
form of curved vanes fixed in an annular passage. The swirl numbers considered for the …
form of curved vanes fixed in an annular passage. The swirl numbers considered for the …
Impinging jet noise reduction using non-circular jets
P Balakrishnan, K Srinivasan - Applied Acoustics, 2019 - Elsevier
Experimental studies in the acoustic far field and flow visualization are carried out on circular
and non-circular impinging jets at a nozzle to plate distance ratio of 5, for the nozzle …
and non-circular impinging jets at a nozzle to plate distance ratio of 5, for the nozzle …
Influence of the swirl vanes in convergent-divergent nozzle on screech tones and mixing efficiency at subsonic and supersonic jet flow
Purpose The purpose of this study is to investigate the effect of coaxial swirlers on acoustic
emission and reduction of potential core length in jet engines. Design/methodology …
emission and reduction of potential core length in jet engines. Design/methodology …
Pipe jet noise reduction using co-axial swirl pipe
P Balakrishnan, K Srinivasan - The Aeronautical Journal, 2017 - cambridge.org
The present experimental work highlights the acoustic far field and flow field characteristics
of confined co-axial swirling pipe jets. Co-axial confinements with six vanes at angles of 0° …
of confined co-axial swirling pipe jets. Co-axial confinements with six vanes at angles of 0° …
Reduction of jet impingement noise by addition of swirl
P Balakrishnan, K Srinivasan - … of Vibration and …, 2016 - asmedigitalcollection.asme.org
Experimental investigations are carried out with an objective of reducing impingement jet
noise using coaxial swirl jets. Two nozzle-to-plate distances have been considered and the …
noise using coaxial swirl jets. Two nozzle-to-plate distances have been considered and the …
Acoustic Measurements of Compressible Jet Flow from a Pipe Nozzle with Clover Cross-section
The experimental work is carried out on jet flow issuing from a pipe with clover cross section.
A compressible jet facility is used to produce the jet. The settling chamber pressure is varied …
A compressible jet facility is used to produce the jet. The settling chamber pressure is varied …
Preliminary studies on jet flows from flat vane swirler: Effect of twist angle
In this present work, jet noise level measurements and flow field characteristics of coaxial flat
vane Swirlers are investigated out experimentally to calculate the efficiency of the passive …
vane Swirlers are investigated out experimentally to calculate the efficiency of the passive …
Preliminary studies on jet flow from non-uniform straight vane swirler: Effect of vane orientation
The present study is about the acoustic noise levels and flow visualization for jet flow from a
coaxial pipe with a circular cross-section and six flat vanes. Experiments are conducted …
coaxial pipe with a circular cross-section and six flat vanes. Experiments are conducted …
[PDF][PDF] Preliminary studies on jet flows from flat vane swirler: Effect of twist angle
In this present work, jet noise level measurements and flow field characteristics of coaxial flat
vane Swirlers are investigated out experimentally to calculate the efficiency of the passive …
vane Swirlers are investigated out experimentally to calculate the efficiency of the passive …