基于飞秒激光的一维速度场测量方法

• Femtosecond laser-induced cyano chemiluminescence uses femtosecond filaments to tag molecules in a flow field, and velocity information of the flow field can be obtained by observing the displacement of the tagged molecules within a known time. The one-dimensional (1D) emitting line contains 1D velocity field information, but only the velocity at the central point can be given because it is unable to precisely correlate the position information before and after the line moves. For this problem, we propose a 1D velocity field inversion algorithm, which can invert the velocity of the whole emitting line according to the displacement of the emitting line and its shape, and finally obtain the 1D-2C velocity field information on the line. By using the moving trajectory of multiple emitting lines we can also obtain the 2D velocity field information.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Femtosecond laser filamentation

One-dimensional measurements

Velocity field

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