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本文采用PIV测量技术研究充分发展水平槽道内的两相湍流的变动规律(Re=590)。首先将单相湍流的测量结果与文献中DNS的结果进行了比较,证明了PIV测量湍流脉动的可行性,并通过引入PTV算法获得了近壁对数边界层内的湍流量。对两相流动的测量结果表明,即使在1％的低颗粒质量载荷下,气体湍流已有明显的变动,并且壁面附近和槽道中心的变动规律不同。
In this paper, the variation of two-phase turbulence in a fully developed horizontal channel was studied by PIV measurement technique (Re = 590). The results of single-phase turbulence and DNS in the literature are compared firstly. The feasibility of PIV for turbulent pulsation measurement is demonstrated. The turbulent flow in the near-wall logarithmic boundary layer is obtained by introducing PTV algorithm. The measurement results of two-phase flow show that the gas turbulence has been obviously changed even under low particle mass loading of 1%, and the variation of the turbulence in the vicinity of the wall and the center of the channel is different.