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強激光輻照引起的氣化反沖與沖擊波傳播

The blow-off impulse and shock wave propagation in materials induced by high-intensity pulsed laser irradiation

  • 摘要: 材料在強脈沖激光輻照下，表面將出現(xiàn)氣化反沖，從而在內部形成沖擊波。文章介紹了確定靶面壓力的常用定標關系，計算了鋁靶和滌綸靶在激光輻照下的表面壓力和沖量耦合系數(shù)；文中還對激光沖擊波的傳播進行了數(shù)值模擬，得到了激光沖擊波的傳播圖像及其與激光脈寬的關系。

     

    Abstract: When a body is irradiated by a beam of high-intensity pulsed laser, a reversed impulse will be generated on its surface, and at the same time, a shock wave will be formed and propagate inside the body. This paper proposes a formula to estimate the pressure on the surface, and the impulse coupling coefficients are obtained for aluminum and polyester targets. The propagation images of the shock wave and their relation with the pulse width of the laser are analyzed.

     

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