This paper presents the experimental results of underexpanded jets delivered from a central nozzle surrounded by a co-flow. The co-flow is found to be effective in elongating the supersonic core length of the central jet, at all levels of underexpansion. However, the expansion level of the central jet dictates the elongation caused by the co-flow.

References

References
1.
Murakami
,
E.
, and
Papamoschou
,
D.
, 2000, “
Mixing Layers Characteristics of Coaxial Supersonic Jets
,”
21st AIAA Aeroacoustics Conference
,
Lahaina
, HI.
2.
Roshko
,
A.
, and
Papamoschou
,
D.
, 1986, “
Observation of Supersonic Free Shear Layers
,” AIAA Paper No. 86-0162.
3.
Pinnam
,
L.
, and
Rathakrishnan
,
E.
, 2011, “
Experimental Studies on Co-Flowing Subsonic and Sonic Jets
,”
Flow, Turbul. Combust.
,
87
(
1
), pp.
115
132
.
4.
Sharma
,
H.
,
Vashishtha
,
A.
,
Lovaraju
,
P.
, and
Rathakrishnan
,
E.
, 2008, “
Experimental Study of Overexpanded Co-Flowing Jets
,”
Aeronaut. J.
,
112
(
1135
), pp.
537
546
.
5.
Rathakrishnan
,
E.
, 2010,
Applied Gas Dynamics
,
John Wiley
,
NJ
.
You do not currently have access to this content.