S0502-5-2 脈動噴流における渦輪の挙動解析([S0502-5]噴流,後流および剥離流れ現象の解明と制御(5))

概要

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The behavior of a vortex ring generated by a pulsating jet flow, cyclic vortex ring, is investigated experimentally with PIV measurement. The waveform of jet flow is conducted by sine curves under the conditions of amplitude Reynolds' numbers Re_0 of 1200〜5040 and Womersley numbers a of 12.5〜24.4. The results indicate that the separation vortex ring which is formed from separated wall boundary layer in the nozzle during the suction period is transported toward the nozzle exit during discharge period. This separation vortex ring interferes with the formation process and behavior of the cyclic vortex ring. Some characteristic scales and propagation velocity of cyclic vortex ring are expressed as empirical functions with pulsating jet conditions.
一般社団法人日本機械学会の論文
2010-09-04