Discharging gas jets in low-pressure conditions are interesting and important phenomena from an engineering point of view. For example, in aerospace technology they relate to the gas jet thruster for attitude control of artificial satellite, or in laser technology assist gas behavior for laser material processing under low pressure. The jets, however, deform to the complicated shapes by interacting with solid walls. This paper deals with a visualization experiment on the interacting jet and plane wall by applying LIF (Laser Induced Fluorescence) method using an Ar-ion laser. We have obtained a series of jet-wall interacting images at various distances and clarified the behavior of impinging jet to the plane wall.

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