underexpanded

形容词 adj.

英文释义

形容词 adj.
  1. Less than usually expanded not-comparable
    — 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.

词源

From under- + expanded.
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