Noise generation during the simultaneous collapse of two bubbles 双空泡溃灭及空化噪声的建模
2.
Numerical simulation of dynamic characteristics of spherical bubble collapse in pulsed abrasive water jet 脉冲磨料射流中球泡溃灭特性研究及数值分析
3.
Further strengthened by a demonic magic that enhances his attacks , he can crush enemies with shocking ease 在其力量被更进一步地以恶魔邪术予以强化后,砸烂溃灭敌人对他来说有若砍瓜切菜之易。
4.
The flux of ventilating is one of the most important factors of the control of producing , developing and crumbling of supercavitation 充气流量是控制超空泡产生、发展和最后溃灭的主要因素之一。
5.
In order to make sure the point where an empty bubble breaks and breakage function on the solid wall due to cavitatin , some exploration work is performed 为确定空泡溃灭点,并由此确定空蚀对固壁的破坏作用作了探索性工作。
6.
The bubbles in diesel engine fuel injection system are studied . the frequency structure of pressure wave with bubbles bursting , as well as relation of types of bubbles and frequency spectrum , is expounded 采用频谱分析法对柴油机燃油喷射系统中的汽泡进行了研究,分析了汽泡溃灭造成压力波振荡的频率结构特性,并论述了汽泡与压力波及其频谱的关系。
7.
Firstly it discusses the value , meaning , background and method of this topic . then it deducts the single - bubble sound pressure , spectrum of sound pressure , power spectrum . according to the real situation of traveling bubble cavitation noise around a schiebe body , the mathematical model of single - bubble collapse is selected , furthermore , the mathematical model of mass traveling bubbles without interference effect is established , and the multi - peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method 首先论证了本项研究的意义,价值,背景和方法,然后推出了单空泡辐射噪声声压,声压谱和功率谱,针对回转体流动泡空化噪声的具体情况,选择了双指数模型作为单空泡溃灭的数学模型,进一步建立了无干涉条件下的群泡辐射噪声的数学模型,并用统计的方法分析了空泡溃灭时的多峰值和反弹现象。
8.
The extend work of my doctoral research is introduced in the part . problems of cavitation noise are investigated with three methods such as theory analysis , numerical simulation and experiment research . mixed boundary element method is put forward to solve acoustics of bubble collapse by author 第二部分:空化噪声研究该部分工作是作者博士期间工作的延续,对空化噪声问题从理论分析方面、数值模拟及实验三方面进行研究,应用作者提出的混合边界元方法求解了空泡在边界附近溃灭时的辐射噪声问题。
9.
Neglecting the influence of some factors , such as liquid ' s viscidity etc . , upon the process of empty bubble breaking , the authors analyze the pressure variation on bubble ' s wall in all directions when it shrinks , and deduce the equation of its moving track towards the rigid side wall under the function of asymmetry pressure 摘要通过对忽略液体粘性等一些因素对空泡溃灭过程的影响,分析了空泡在收缩过程中,泡壁四周压强的变化,得出空泡在此不均匀压强的合力作用下向刚性边壁运动的轨迹方程。