The principle of abrasive waterjet and the method as well as equipment of realization of submerged abrasive waterjet were briefly introduced 摘要简要介绍了磨料射流原理以及实现淹没磨料射流的方法和装置。
To the author ' s knowledge , this dissertation is a rather early study of dns on gas - solid two - phase plane turbulent jets in mainland 据作者所知，本文是国内较先开展的关于气固两相平面湍流射流的dns研究。
The result shows the periodic characteristics of microjet flow field including vortex pair evolution , immigration and dissipation process 模拟结果显示了微射流的产生、形成、发展与耗散过程以及微射流的卷吸特征等。
So this dissertation studies the microjet flow field and the synthetic flow field of the microjet and the mean flow by numerical simulation 本文对微射流及其与主射流的合成流场进行数值模拟和机理分析，为微射流技术的工程应用研究打下基础。
The flow characteristics , eddy structure and energy dissipated mechanism of multi - horizontal submerged jets ( mhsj ) are studied by means of 3 - d numerical simulation 摘要采用三维数值模拟，研究了多股多层水平淹没射流的流动特性、漩涡结构和消能机理。
Under the preliminary experimental research , the micro - actuator was substituted by a buzzer , water and ink were separately used as working substance and coloring agent 在微射流的原理性实验中，本文采用蜂鸣器代替微射流作动器，并以水作为工质，以墨汁作为染色剂。
By drilling to weak position , the jet - grouting technique breaks through and mixes with soil and stone of dam foundation to form diaphragm - wall 高压喷射灌浆可由钻机钻孔至需处理的薄弱部位，通过高压射流的冲击搅拌，水泥浆在喷射范围内与地层土石颗粒掺混搅合后形成防渗墙。
Secondly , the helmholtz oscillator was designed . based on the flow network theory , the expression of intrinsic frequency was deduced . the main parameter of helmholtz oscillator was calculated 对于同一结构的helmholtz共振腔，水力参数不同，所产生的自激振荡脉冲射流的强弱也不相同。
The theoretical and experimental results show that the efficiency of transmission of energy and mass to use pulsed jet is greatly raised , compared with steady jet , in the same device of liquid jet pump 结果表明，在相同的液体射流泵装置上，采用脉冲射流比恒定射流的传能及传质效率有较大的提高。
Based on the 3 - d numerical simulation and the model test , many factors affecting the flow pattern stability and the hydraulic characteristics of the horizontal submerged jets are studied 摘要采用数值模拟和模型试验相结合的方法，分析了水股分层、坎高、出口体型和跌坎形式等因素对多股水平淹没射流的流态稳定性和水力特性的影响。
