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도덕희(Doh Eeog Hee),황태규(Hwang Tae Gyu),조경래(Cho Kyung Rae),편용범(Pyeon Yong Beom),조용범(Cho Yong Beom) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.4
Analyses on the Hrdroelastic Flow-Structure Interactions on pulsed impinged jet is measured with the FSIMS(Flow-Structure Interaction Measurement System. The measurement system consists of three cameras(1k x 1k), light sources(Ar-ion) and a host computer. The nozzle diameter is D=15㎜ and two major experiments have been carried out for the cases of the distance between the nozzle tip to the elastic wall is 6.0. The pulsed jets were controlled by a solenoid valve and were impinged onto an elastic plate (material: silicon, diameter: 350㎜, thickness: 0.5㎜, hardness: 15). The Reynolds numbers were 20,000 and 24,000 when the jets were impinged with the volume velocities. Experimental results showed that the elastic plate moved slightly to the opposite direction of the jet direction at the time of valve opening. It has been shown that the vortices travelling over the surface of the wall made the elastic wall distorted locally due to a vector forces between rotating forces of the vortex and a newly-incoming flow.
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