|
|
 |
 |
|
|
|
Selected Navigations:
Author >
[x]
|
Sort results by:
|
|
|
There are a total of 100 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
|
An Investigation of Noise Reduction for the 3BB Nozzle with a Pylon Using External Flaps
Author(s): Zaman, K. B. M. Q.
Abstract: Flaps (or half wedges) attached to the sides of a pylon are shown to result in a small but clear noise benefit. Noise radiated towards the ground is reduced apparently through a deflection and thickening of the fan stream ...
NASA Center: Glenn Research Center
Publication Year: 2008
Added to NTRS: 2008-11-10
Document ID: 20080040783; Report Number: E-16562, NASA/TM-2008-215288
Streamwise vorticity generation and mixing enhancement in free jets by delta-tabs
Author(s): Zaman, K. B. M. Q.
Abstract: The effect of triangular tabs, placed at the nozzle exit, on the evolution of free jets is investigated. The effect, a large distortion of the jet cross section and a resultant increase in mixing downstream, has been ...
NASA Center: Glenn Research Center
Publication Year: 1993
Added to NTRS: 2008-07-24
Accession Number: 93N31648; Document ID: 19930022459; Report Number: AIAA PAPER 93-3253, E-7955, NAS 1.15:106235, NASA-TM-106235
Asymptotic Spreading Rate of Initially Compressible Jets-Experiment and Analysis
Author(s): Zaman, K. B. M. Q.
Abstract: Experimental results for the spreading and centerline velocity decay rates for round, compressible jets, from a convergent and a convergent-divergent nozzle, are presented. The spreading rate is determined from the variation ...
NASA Center: Glenn Research Center
Publication Year: 1998
Added to NTRS: 2008-06-02
Document ID: 20000002813
Noise and Spreading of a Subsonic Coannular Jet - Comparison with Single Equivalent Jet
Author(s): Zaman, K. B. M. Q.; Dahl, M. D.
Abstract: 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 ...
NASA Center: Glenn Research Center
Publication Year: 2005
Added to NTRS: 2008-06-02
Document ID: 20050060688; Report Number: AIAA Paper 2005-0210
Pitched and Yawed Circular Jets in Cross-Flow
Author(s): Milanovic, Ivana M.; Zaman, K. B. M. Q.
Abstract: Results from an experimental investigation of flow field generated by pitched and yawed jets discharging from a flat plate into a cross-flow are presented. The circular jet was pitched at alpha = 20 degrees and 45 degrees ...
NASA Center: Goddard Space Flight Center
Publication Year: 2002
Added to NTRS: 2008-06-02
Document ID: 20020079878
Unsteady Jets in Crossflow
Author(s): Zaman, K. B. M. Q.
Abstract: The effect of periodic perturbation on jet in cross-flow (JICF) is reviewed. In the first part of the paper, flow visualization result from several past works are discussed. Beginning with description of the characteristic ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2008-06-02
Document ID: 20040112024; Report Number: HT-FED2004-56822
Reversal in Spreading of a Tabbed Circular Jet Under Controlled Excitation
Author(s): Zaman, K. B. M. Q.; Raman, G.
Abstract: Detailed flow field measurements have been carried out for a turbulent circular jet perturbed by tabs and artificial excitation. Two "delta tabs" were placed at the nozzle exit at diametricall opposite y locations. The ...
NASA Center: Glenn Research Center
Publication Year: 1997
Added to NTRS: 2008-06-02
Document ID: 20000004263
Noise Characteristics of Overexpanded Jets from Convergent-Divergent Nozzles
Author(s): Zaman, K. B. M. Q.
Abstract: A broadband noise component occurring in the overexpanded flow regime with convergent-divergent nozzles is identified. Relative to a convergent nozzle, at same pressure ratios, this excess noise can lead to a large increase ...
NASA Center: Glenn Research Center
Publication Year: 2008
Added to NTRS: 2008-03-01
Document ID: 20080006071; Report Number: AIAA Paper-2008-25
Time-Accurate Computations of Isolated Circular Synthetic Jets in Crossflow
Author(s): Rumsey, C. L.; Schaeffler, N. W.; Milanovic, I. M.; Zaman, K. B. M. Q.
Abstract: Results from unsteady Reynolds-averaged Navier-Stokes computations are described for two different synthetic jet flows issuing into a turbulent boundary layer crossflow through a circular orifice. In one case the jet effect ...
NASA Center: Glenn Research Center, Langley Research Center
Publication Year: 2007
Added to NTRS: 2007-12-28
Document ID: 20070038336
Control of shear flows by artificial excitation
Author(s): Rice, E. J.; Zaman, K. B. M. Q.
Abstract: Investigations involving artificial excitation of various shear flows are reviewed. Potential applications of excitation in flow control, e.g., in enhancing mixing, and in delaying transition and separation are discussed. An ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N29420; Document ID: 19870019987; Report Number: AIAA PAPER 87-2722, E-3794, NAS 1.15:100201, NASA-TM-100201
|
|
|
|
|
