Abstract
In the present investigation, effect of subsonic and sonic co-flow on the supersonic core of sonic and supersonic jets has been studied. For sonic jet studies, a convergent circular nozzle is used. For supersonic jet studies, circular C-D nozzles with Mach numbers 1.43 and 2 are used. To introduce co-flow, the aforesaid primary nozzles were surrounded by a convergent nozzle. For jets from sonic nozzle, the underexpansion levels (P e /P a greater than 1) studied are 1.58 and 2.10. For Mach 1.43 nozzle, the levels of expansion studied are 0.75, 0.90, 1.50 and 2.10 and for Mach 2 nozzle the overexpansion levels (P e /P a less than 1) studied are 0.78 and 0.91. The prime interest of this study is to analyze the effect of co-flow on the primary jet shock structure at overexpanded and underexpanded operating conditions. In addition, the effect of co-flow at same underexpansion level (primary nozzle) on the supersonic core of the primary jet in the case of sonic and Mach 1.43 nozzles are analyzed. Similarly, the effect of same overexpansion level on the supersonic core of Mach 1.43 and 2 primary jets has been studied.
| Original language | English |
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| Title of host publication | 2nd International Conference on Recent Advances in Experimental Fluid Mechanics, 3-6 March 2008., At Vijayawada |
| Publication status | Published - 03 Mar 2008 |