Abstract
The present study describes an experimental work to investigate the effect of a nozzle exit reflector on a supersonic jet that is discharged from a convergent-divergent nozzle with a design Mach number of 2.0. An annular reflector is installed at the nozzle exit and its diameter is varied. A high-quality spark schlieren optical system is used to visualize detailed jet structures with and without the reflector. Impact pressure measurement using a pitot probe is also carried out to quantify the reflector's effect on the supersonic jet which is in the range from an over-expanded to a moderately under-expanded state. The results obtained show that for over-expanded jets, the reflector substantially increases the jet spreading rate and reduces the supersonic length of the jet, compared with moderately under-expanded jets. The reflector's effect appears more significant in imperfectly expanded jets that have strong shock cell structures, but is negligible in correctly expanded jet.
| Original language | English |
|---|---|
| Pages (from-to) | 229-239 |
| Number of pages | 11 |
| Journal | Shock Waves |
| Volume | 15 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - Jul 1 2006 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Physics and Astronomy(all)
Cite this
Experimental investigation of nozzle exit reflector effect on supersonic jet. / Kweon, Y. H.; Miyazato, Y.; Aoki, Toshiyuki; Kim, H. D.; Setoguchi, T.
In: Shock Waves, Vol. 15, No. 3-4, 01.07.2006, p. 229-239.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Experimental investigation of nozzle exit reflector effect on supersonic jet
AU - Kweon, Y. H.
AU - Miyazato, Y.
AU - Aoki, Toshiyuki
AU - Kim, H. D.
AU - Setoguchi, T.
PY - 2006/7/1
Y1 - 2006/7/1
N2 - The present study describes an experimental work to investigate the effect of a nozzle exit reflector on a supersonic jet that is discharged from a convergent-divergent nozzle with a design Mach number of 2.0. An annular reflector is installed at the nozzle exit and its diameter is varied. A high-quality spark schlieren optical system is used to visualize detailed jet structures with and without the reflector. Impact pressure measurement using a pitot probe is also carried out to quantify the reflector's effect on the supersonic jet which is in the range from an over-expanded to a moderately under-expanded state. The results obtained show that for over-expanded jets, the reflector substantially increases the jet spreading rate and reduces the supersonic length of the jet, compared with moderately under-expanded jets. The reflector's effect appears more significant in imperfectly expanded jets that have strong shock cell structures, but is negligible in correctly expanded jet.
AB - The present study describes an experimental work to investigate the effect of a nozzle exit reflector on a supersonic jet that is discharged from a convergent-divergent nozzle with a design Mach number of 2.0. An annular reflector is installed at the nozzle exit and its diameter is varied. A high-quality spark schlieren optical system is used to visualize detailed jet structures with and without the reflector. Impact pressure measurement using a pitot probe is also carried out to quantify the reflector's effect on the supersonic jet which is in the range from an over-expanded to a moderately under-expanded state. The results obtained show that for over-expanded jets, the reflector substantially increases the jet spreading rate and reduces the supersonic length of the jet, compared with moderately under-expanded jets. The reflector's effect appears more significant in imperfectly expanded jets that have strong shock cell structures, but is negligible in correctly expanded jet.
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U2 - 10.1007/s00193-006-0021-6
DO - 10.1007/s00193-006-0021-6
M3 - Article
AN - SCOPUS:33746456872
VL - 15
SP - 229
EP - 239
JO - Shock Waves
JF - Shock Waves
SN - 0938-1287
IS - 3-4
ER -