underexpanded en · ADJ
Pronunciation
- (US) audio
Etymology
From under- + expanded.
Meanings
-
(not-comparable) Less than usually expanded
The setup makes use of LEDs, pulsed with high currents to increase the optical output to sufficient levels, exploiting the advantages of LED light over conventional light sources. As a test-case we study the interaction of a Mach 1.7 cross flow and a transverse underexpanded jet, which is commonly studied considering the mixing and combustion in scramjet engines.
2016, Ella Giskes, Ruben A. Verschoof, Frans B. Segerink, Cornelis H. Venner, “Schlieren study of a sonic jet injected into a supersonic cross flow using high-current pulsed LEDs”, in arXiv: