【作者】 杜春涛；

【导师】 董志峰；

【作者基本信息】 中国矿业大学（北京） ， 机械设计及理论， 2014， 博士

【摘要】 针对影响矿井回风喷淋换热器换热性能、回风阻力、挡水板过水量的因素及规律，基于全热交换效率和通用热交换效率模型，建立了湍流状态下反映气水直接接触热质交换时水滴温度变化的液滴热交换效率模型；利用计算流体动力学软件FLUENT对矿井回风与液滴气、液两相流进行了3D仿真，得出了液滴直径、回风速度、喷淋高度、喷淋方向、喷嘴数量、喷嘴质量流率、液滴与回风之间温差等因素对换热器换热性能的影响规律，以及液滴大小、回风速度、平面挡水板挡板倾角及间距、弧面挡水板半径、蛇型挡水板挡板间距和高度、V型挡水板等因素对回风阻力和挡水板过水量的影响规律。最后通过实验对仿真结果进行了验证。更多还原

【Abstract】 In order to find the influencing factors and principles on thermal performanceof mine return air spraying heat exchanger (MRASHE), pressure&pressure drop ofmine return air (MRA), and the drift loss rate of drift eliminator (DE), theoreticalmodel of drops heat transfer rate indicating change in drops temperature when returnair and water contact directly was developed based on the overall heat transfer ratemodel and general heat transfer model. Computer fluid dynamics (CFD) simulationsoftware package FLUENT was employed to simulate two-phase flow of MRA andwater droplets in3D space. The influencing principles of thermal performance ofMRASHE by7factors were summed up. These factors include: drop diameter, returnair velocity, spraying height, spraying direction, nozzle number, nozzle mass flow rate,difference in initial temperature between water droplets and MRA, and theinfluencing principles of pressure&pressure drop of MRA, and drift loss rate of DEby several factors of return air velocity, angle between blades of plane DE (PDE) andthe horizontal plane, blades spacing of PDE, blades radius of arc DE (ADE), bladesspacing and height of snake-type DE (SDE), and V-type DE (VDE). Finally, thesimulation results have been experimentally verified.更多还原