Quantitative visualization of weak shock waves by phase-shift holographic interferometry
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چکیده
By applying two-reference beam interferometry together with digital data processing, a correspondingly modified double exposure holographic interferometer has been used to measure the density distribution in flow fields generated by very weak shock waves. The weak shock waves were generated by the explosion of milligram charges of silver azide, which were ignited by a pulsed Nd:YAG laser. With the help of this technique, density variations in a flow field associated with a shock Mach number Ms = 1.0007 were visualized and quantified. Phenomena that generated a sound intensity of 135dB could be resolved.
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تاریخ انتشار 2001