矩形流路内での対向噴流による流体混合

概要

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The opposed jet flow is measured and its CFD simulation is performed to study the flow behavior in a rectangular duct. The jets are oppositely collided in a one-side-closed rectangular duct. In order to understand the whole combustor flow field it is necessary to study air jet dilution effects which are typically arranged by opposed jets. Experiments and simulations are performed using air, where the Reynolds number is 2×10^4, based on jet diameter and jet velocity. Velocity distribution and turbulent intensity are measured by Laser Doppler Velocimetry, and simulated by a large-eddy simulation. LES results are generally in quantitative agreement with the experiment. The details of fluid flow are discussed with the results of CFD. In the results of CFD, jets are impinged almost stably each other. However, the radian jet which is generated on impinging plane is fluctuated. This result suggested that mixing of opposed jets impinged flow are concerned with radial jet fluctuation.
2013-11-20