Publications in Scientific Journals:
B. Semlitsch, M. Mihaescu:
"Evaluation of Injection Strategies in Supersonic Nozzle Flow";
Aerospace,
8
(2021),
12, 369;
1
- 15.
English abstract:
The ability to manipulate shock patterns in a supersonic nozzle flow with fluidic injection is investigated numerically using Large Eddy Simulations. Various injector configurations in the proximity of the nozzle throat are screened for numerous injection pressures. We demonstrate that fluidic injection can split the original, single shock pattern into two weaker shock patterns. For intermediate injection pressures, a permanent shock structure in the exhaust can be avoided. The nozzle flow can be manipulated beneficially to increase thrust or match the static pressure at the discharge. The shock pattern evolution of injected stream is described over various pressure ratios. We find that the penetration depth into the supersonic crossflow is deeper with subsonic injection. The tight arrangement of the injectors can provoke additional counter-rotating vortex pairs in between the injection.
Keywords:
flow control; supersonic nozzle flow; loss reduction
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.3390/aerospace8120369
Created from the Publication Database of the Vienna University of Technology.