Micro-flow characteristics of jet impacting the wall processing emulsion under ultra-high pressure was researched in the paper. A new method was proposed which organically combines ultra-high pressure technology, micro-channel flow technology and impact streaming technology for the refinement of liquid particles. Aim at the problem of the lack of basic data, three turbulence models of standard model, RNG model and Realizable model were respectively used to calculate three planes,. The advantages and disadvantages of the three models and the their suitable extents of fluid flow field impacting the wall were analyzed and compared,. The result proves that jet can obtain highest energy, and high speed of the jet can has a huge impact crushing effect. Through analysis of the velocity and dynamic pressure results, the best distance can maximize the impacting energy, and effectively solve the optimization of the distance between nozzle exit and the wall.%研究了超高压微射流撞击壁面动力特性优化控制问题,使微射流能最大限度地保持高压能量.为此提出一种集微射流、超高压技术和撞击流三者优势于一体的制备微乳液的新方法,针对超高压下微射流撞击壁面的流场基础研究数据缺乏的问题,分别用三种湍流模型:标准k-ε模型、RNG k-ε模型、Realizable模型对三个截面进行了计算,进行分析比较优缺点以及对超高压微射流撞击壁面流场的适用程度.仿真结果表明,高速射流的撞击会产生巨大破碎作用.通过对喷嘴出口到壁面的速度和动压的结果分析,最佳的距离能获得最大的碰撞能量,有效地解决了喷嘴出口到壁面距离的优化,以便得到更好的粉碎效果,为射流撞击动力学的研究提供了依据.
展开▼
