基于UDS框架的水滴撞击特性数值计算方法  

Calculation of water droplet impingement characteristics based on UDS frame

作　　者：毛晓东[1] 卜雪琴[2] 赵国昌[1] 王建明[1] 

机构地区：[1]沈阳航空航天大学航空航天工程学部(院),沈阳110136 [2]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《沈阳航空航天大学学报》2016年第1期8-12,共5页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:51206008)

摘　　要：为了预测二维/三维复杂表面在可压/不可压流动状态下的水滴撞击特性,提出了一种基于UDS框架的水滴撞击特性数值计算方法。水滴相和空气相认为单向耦合,空气相流场由N-S方程预先求得。水滴相控制方程基于FLUENT中UDS输运方程框架,自定义编程迭代求解。为了排除壁面处水滴,给出一种水滴撞击壁面边界条件处理方法。引入具有自适应性的人工数值扩散项以增加计算稳定性,避免局部水滴容积分数异常大导致解的奇异。验证计算了二维圆柱和三维球面,通过与公开文献中试验数据的对比,证明了本文计算方法的准确性和有效性,能很好的解决复杂表面在各种流动状态下的水滴撞击特性预测。In order to predict the water droplet impingement characteristics of 2-dimensional and 3-dimensional surfaces under compressible and uncompressible flowconditions,a calculation method based on UDS frame was approached. The air-droplet two-phase flowwas considered as one-way coupled. The airflowfield could be solved previously and independently using N-S equations. The droplet control equations were userprogramed and iterated under fluent UDS frame. To remove the droplet from wall boundaries,a treatment of boundary conditions on the impingement surfaces was given. A self-adaptation artificial numerical diffusion model was proposed to enhance the iteration stability and avoid the singularity of droplet volume fraction in localized region. Validation cases were performed for typical 2-dimensional cylinder and 3-dimensional sphere,through the comparison with the published experimental results,the approached calculation method was proved to be accurate and effective in predicting the droplet impingement characteristics on complex surfaces under various flowconditions.

关 键 词：UDS框架 水滴撞击 结冰 二相流 数值计算 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]