摘要
采用代数应力模型对水力旋流器内的湍流场进行了数值模拟，并用实测结果验证了计算结果的可信性，获得了旋流器内湍动能及湍动能耗散率的分布规律。结果表明，在溢流管端以下轴向位置上湍动能分布具有相似性，呈两边高中间低的不对称鞍形；在溢流管与旋流器壁之间的环隙空间内湍动能沿径向方向变化不大；旋流器内湍动能较大的区域是溢流管端以下空气柱附近的内旋流区域；旋流器内湍动能耗散率分布与湍动能分布有十分相似的规律，溢流管端以下空气柱附近的内旋流区域亦是湍动能耗散损失较严重的区域。
A numerical simulation was made for the turbulence field in a hydrocyclone by using the algebraic stress turbulence model,the calculated result was verified with the measured result,the distribution law of the turbulent kinetic energy and the dissipation of the turbulence energy was derived.The result shows that the distribution of the turbulent kinetic energy at the axial position under the end of the overflow tube is similar and appears to be an asymmetric saddle; there is not an evident change of the turbulent kinetic energy along the radial direction in the loop space between the overflow tube and the wall of the hydrocyclone;there is larger turbulent kinetic energy in the internal swirl area near the air column under the end of the overflow tube in the hydrocyclone;the distribution laws of the turbulent kinetic energy dissipation and the turbulent kinetic energy in the hydrocyclone are very similar,the loss of the turbulent kinetic energy dissipation is also very comparatively serious in the internal swirl area near the air column under the end of the overflow tube.
出处
《化工机械》
CAS
1998年第5期6-10,共5页
Chemical Engineering & Machinery
基金
中国博士后科学基金
国家教委高等学校博士点专项科研基金
关键词
水力旋流器
节能
湍流
湍动能耗散率
能耗
Hydrocyclone,Energy Consumption,Energy Conservation,Turbulence,Numerical Simulation,Turbulent Kinetic Energy,Turbulent Kinetic Energy Dissipation
