Zobrazeno 1 - 10
of 43
pro vyhledávání: '"K. B. M. Q. Zaman"'
Publikováno v:
International Journal of Aeroacoustics. 15:324-335
Flow visualization is used to investigate shock-spacings in a supersonic jet during stage-jumps associated with the screech phenomenon. Conventional schlieren and shadowgraphy techniques as well as a new projection focusing schlieren technique are em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77f2db3ab74236cfeacf9edfd83a1f69
https://doi.org/10.1177/1475472x16630888
https://doi.org/10.1177/1475472x16630888
Publikováno v:
AIAA Journal. 54:434-442
The location of shock-induced boundary-layer separation inside the divergent section of convergent–divergent nozzles is studied experimentally. Pressure-sensitive paint technique is used with nozzles of different design Mach numbers in the range 1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::158d34efb5c812fc8add6999acff5482
https://doi.org/10.2514/1.j054238
https://doi.org/10.2514/1.j054238
Publikováno v:
Journal of Fluid Mechanics. 779:751-775
The interaction between an 8:1 aspect ratio rectangular jet and a flat plate, placed parallel to the jet, is addressed in this study. At high subsonic conditions and for certain relative locations of the plate, a resonance takes place with accompanyi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d428b4b29a7a73afd0546d4583218694
https://doi.org/10.1017/jfm.2015.453
https://doi.org/10.1017/jfm.2015.453
Publikováno v:
International Journal of Aeroacoustics. 12:189-214
This study addresses unwanted high intensity noise sometimes encountered in engine test facilities. Model-scale experiments are conducted for a round jet discharged into a cylindrical duct. In most cases, the unwanted noise is found to be due to long
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e91aaa76e523c089dca98e575479a40
https://doi.org/10.1260/1475-472x.12.3.189
https://doi.org/10.1260/1475-472x.12.3.189
Autor:
K. B. M. Q. Zaman
Publikováno v:
International Journal of Aeroacoustics. 11:917-936
The effect of microjet (μjet) injection on the noise from supersonic jets is investigated. One convergent and three convergent-divergent (C–D) nozzles, covering design Mach numbers ( MD) 1.0 to 2.2, are used in the study; all nozzles have the same
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93fcb4f0037a193fdad54ec5c7f4df4a
https://doi.org/10.1260/1475-472x.11.7-8.917
https://doi.org/10.1260/1475-472x.11.7-8.917
Autor:
K. B. M. Q. Zaman
Publikováno v:
AIAA Journal. 50:1784-1795
Significant differences in subsonic jet noise databases have been reported in recent review papers. Specifically, university-type facilities involving higher contraction ratios andpossibly cleanerflows are noted to yield higher levels of noise relati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5971804068d831a0f65b197bec3ae95
https://doi.org/10.2514/1.j051712
https://doi.org/10.2514/1.j051712
Autor:
K. B. M. Q. Zaman
Publikováno v:
International Journal of Aeroacoustics. 9:705-732
The effect of injecting tiny secondary jets (‘μjets’) on the radiated noise from a subsonic primary jet is studied experimentally. The μjets are injected on to the primary jet near the nozzle exit with variable port geometry, working fluid and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a963a48fb8c0a9753f41372aacdcfc30
https://doi.org/10.1260/1475-472x.9.6.705
https://doi.org/10.1260/1475-472x.9.6.705
Publikováno v:
AIAA Journal. 48:202-214
Results of an experiment on the characteristics of an excess noise occurring with convergent-divergent nozzles in the overexpanded regime are presented in this paper. Data are obtained with five convergent-divergent nozzles and a convergent nozzle, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f755ff81374321717390a2442319ea2e
https://doi.org/10.2514/1.43383
https://doi.org/10.2514/1.43383
Autor:
Milo D. Dahl, K. B. M. Q. Zaman
Publikováno v:
AIAA Journal. 45:2661-2670
The issue of scaling of noise as well as spreading of subsonic coannular jets is revisited. Far-field noise and centerline Pitot-static pressure surveys are conducted with concentric, circular nozzles having an outer-to-inner diameter ratio of 1.42.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8e6e3973b312e402f0d6aef5a28db8a
https://doi.org/10.2514/1.29441
https://doi.org/10.2514/1.29441
Autor:
Frank Y. Wang, K. B. M. Q. Zaman
Publikováno v:
AIAA Journal. 40:401-407
Results of a low-speed experimental investigation of jet behavior in the trailing vortex wake of a wing are presented. The effects of varying jet-to-freestream velocity ratio and vortex-wake strength on the downstream evolution of the flowfield are q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81b597c14d9e8821d247d93a72628c31
https://doi.org/10.2514/2.1669
https://doi.org/10.2514/2.1669