【作者】 张利蓉；

【导师】 毛君； 李蕾；

【作者基本信息】 辽宁工程技术大学 ， 机械设计及理论， 2007， 硕士

【摘要】 随着计算机硬件和计算流体动力学的飞速发展,运用数值模拟的方法对轴流风机内部流场进行模拟,可以帮助我们得出指导性、方向性的结果,可以帮助选择性能最佳设计,具有明显的应用价值。轴流风机是依靠叶轮旋转时叶片产生的升力来输送流体的,因此轴流风机的损失主要是流动损失。弯曲叶片一直是人们为改善风机性能,提高风机效率研究的重点。本论文运用CFD软件—FLUENT对轴流风机进行了三维数值模拟,选取矿用KJZ55型轴流风机及其后导叶作为研究对象,重点研究了风机叶片弯曲角度的变化对整机性能的影响,获得了轴流风机内部流场许多重要流动细节、规律及性能参数。模拟结果对优化轴流风机的叶片形状、改善风机性能提供了依据,尤其是对弯曲叶片技术应用于普通风机提供新的尝试,为提高轴流风机的效率提供参考。更多还原

【Abstract】 With the development of computer hardware and computational fluid dynamics at very fast speed , simulating axial-fan’s the internal flow properly with numerical method can provide computational results in guiding the design and help us to choose the best design plan .Such effort is worthwhile since it greatly reduces the design periods.Axial-fan carry air by uplifted force that blade bring when circumvolving, so the primary of loss is flow loss. Curving blade is emphasis to try best to reform the performance and improve efficiency of axial-fan.The thesis uses the CFD software—FLUENT to stimulate the designed axial fan in the way of three-dimensional numerical simulation. The thesis choose axial-fan of mode KJZ55 of coal mine, emphasis study the influence about curving blade of axial-fan influence its whole performances in different curving angle. In that way, we get many important details, rules and performance parameters about the interior of axial-fan. The simulation result can truly reflect the complex internal flow in the axial-fan and provide the theoretical basis for machine designing and improving. Especially, it provide attempt to curving blade using for general axial-fan and reference to improve axial-fan’s efficiency.更多还原