Primitively , the taylor tape is shaped when the polymer solution conies out from the sprinkler , then the taylor tape is elongated with the spray of instabilities , and the jets form solidified nanofibers gradually 高聚物溶液从喷射孔流出首先要生成几ylor圆锥，然后r几ylor圆锥伸长，并伴随着射流的不稳定运动，接着射流开始向固化纤维转化。
This paper introduces several kinds of principles of pulse jet technology , discusses their advantages and disadvantages , sums up the rules of pulse jet beating the target and analyses its stress characteristics 摘要本文概括介绍了几种脉冲射流技术的原理，探讨了各自的优势与不足，归纳了脉冲射流打击靶体的规律，并分析总结了脉冲射流的应力特点。
This text , after analysing the interdependent relation between the flow law of the efflux , broken rock mechanism and the parameter of nozzle , the lead impeller nozzle and the auto - rotate nozzle were manufactured 本文在分析了射流的流动规律、破岩机理和喷头参数三者之间相互制约、相互依存的关系后，设计并加工制造了内导叶轮喷头和自旋转喷头。
Make a comparison among different driving signals , including square , triangle , sinusoidal and sawtooth wave , it is shown that the square wave has the best driving result and the sawtooth wave has the worst one 实验还对方波、三角波、正旋波及锯齿波等几种不同的驱动信号产生微射流的效果进行了对比。结果表明方波信号产生的微射流最强，锯齿波产生的最弱。
The deflection can make a pair of sensitive elements , two hot wires , be cooled in different degrees , which cause them have different temperatures . so have they different resistance values , which can be measured by a electric bridge 射流的偏转造成电桥的两个敏感元件（热敏丝或热线）不同程度的冷却，它们的电阻阻值因此发生不同程度的变化，从而引起电桥输出的变化。
Through measuring the jet length , the following law is obtained : there exists an optimal driving signal frequency that can produce the strongest microjet for a certain actuator configuration at constant input power 实验测量了不同频率下微射流的流向长度，发现了如下规律：对特定几何结构及尺寸的微射流作动器，在输入功率一定的情况下，存在最佳频率使得微射流最强。
Up to now , studies about round and rectangular jets are prolific . however , numerical studies of plane jets , especially the dns ( direct numerical simulation ) data which bear profound significances on turbulence research , are considerably few 迄今为止，关于圆射流和矩形射流的研究较多，但平面射流的数值成果，尤其是对湍流研究具有指导意义的dns数据，仍相对较少。
Second , numerical simulation and qualitative analysis has been done for the synthetic jet flow field in different cases ( different phase , amplitude and frequency ) , and gained many conclusions which are helpful for designing the synthetic jet actuator 二、对不同驱动频率，振动膜速度幅值以及激励器的结构对合成射流的影响分别进行数值计算和定性分析，得到了大量有助于合成射流激励器设计的结论。
The dissertation also attempts to compute the inner combustor with its jet flow together . combined with experimental results , it analyses the characteristics of the multiphase flow to the jets , especially different baffle body height , nozzle type and particle diameter 结合实验研究，文章分析了分析该燃烧器射流的气固多相流动的特点，着重研究了不同撞击块高度、喷口型式和颗粒粒径等因素对射流流场的影响。
The comparison of the calculation formula for unsteady jet flow with that of steady jet flow demonstrates that the pulse frequency is the main factor influencing the velocity coefficients 2 and 5 , and the relationship between the velocity coefficients of pulsed jet flow and steady jet flow was revealed 通过与恒定射流的流速系数计算式对比，阐明了脉冲频率是影响2和5的主要因素，沟通了脉冲射流与恒定射流流速系数之间的关系。
