水平槽道内湍流变动的PTV实验研究  

EXPERIMENTAL INVESTIGATIONS ON TURBULENCE MODULATION IN A HORIZONTAL CHANNEL FLOW USING PTV

作　　者：郭福水[1] 王汉封[1] 柳朝晖[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074

出　　处：《工程热物理学报》2004年第4期622-624,共3页Journal of Engineering Thermophysics

基　　金：国家重大基础研究专项经费(No.G1999022207);国家自然科学基金资助项目(No.50006003;No.50276021)

摘　　要：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。The turbulence modulation of gas-particle flow in a full developed horizontal channel flow (Re = 590) was measured using particle image velocimetry (PIV). Firstly, the gas species statistics of single phase flow, derived from PIV data, were compared with DNS results (Moser et al., Phys. Fluids, 1999), and it demonstrates the feasibility of turbulence measurement using PIV. By introducing the particle tracking algorithm and high resolution lens, the measurable area of PIV near the wall was successfully extended to y+~ 5. The measurements of gas-particle flow case reveal that, the turbulence modification effects by particle is obvious even with particle mass loading as low as 1%, and its behavior near the bottom wall is different to those in the middle of channel.

关 键 词：粒子图像速度场仪 槽道流 气粒两相流 湍流变动 

分 类 号：TK16[动力工程及工程热物理—热能工程]