We can get turbulent characteristics of different frequency band in constant volume combustion bomb by changing the structure of the perforated plates and the parameter of movement.
本研究使用热线风速仪测量了定容燃烧弹内不同孔板和不同工况下的气流速度，然后进行湍流强度、自相关系数、湍流尺度及能谱密度的计算。
In the high efficiency oil removal technology aspect, the theory study and application experiment of air sparged liquid-liquid hydrocyclone was carried out, enlightened by the air sparged solid-liquid hydrocyclone. Firstly, the strength and movement of dispersed phase was analyzed in theory, it was proved that the air bubble-oil drop polymer trend to move to the axes of hydrocyclone. Secondly, using CFD method, the characteristics of oil-air-water flow field were studied, including velocity distribution, pressure distribution, turbulent motion energy and its dissipation distribution. The characteristics and separation effect under different air injection methods were simulated. Thirdly, the separation ex-periment of air sparged liquid-liquid hydrocyclone was carried out at Lab. The major structure parameters of the hydrocyclone were optimized, the reasonable air injection method and performance parameters were determined through 4 groups of air injection experiments.
首先，对气携旋流场中分散相粒子的受力及运动进行了理论分析，证明了气泡与油滴形成的聚合体，更易于向轴心运动；其次，应用CFD方法，研究了油-气-水三相流场的速度分布、压力分布、湍动能及其耗散率分布特性，对不同注气方式的流场特性及分离效果进行了数值模拟；第三，开展了气携液-液旋流分离特性室内研究，优化了旋流器的主要结构参数，对四种注气方式的分离效率进行了对比，确定了合理的注气方式和操作参数；最后，在油田现场开展了处理聚驱采出污水工艺试验，确定了工艺运行参数，评价了处理效果。
Through building a mathematical model of gas water heater and using the non- structure grid and the K? εdouble equation model as a turbulence model, we can establish the closed equations composed with the continuity equation, the momentum equation component, K equation andεequation. Using eddy dissipation components combustion model, definition boundary conditions in turbulent flow of chemical composition mix and reaction, separation solver used for initialization and solve combustion model, we can obtain the temperature、pressure distribution of gas water heater, as well as CH4, O2, NO mass fraction of the concentration of distribution in combustion process. Through these distributions, the temperature field and each kind of combustion component characteristic were obtained, including some problems that in the design needs to be pay attention to. Through changing the air speed of flow in the software control panel, the difference of the combustion temperature and each kind of gas mass concentration distribution under the different excess air coefficient was obtained.
通过构建燃气快速热水器的数学模型，采用非结构化网格和K-ε双方程模型作为湍流模型，建立由连续方程、动量方程、K方程和ε方程组成的封闭微分方程组，使用涡耗散组分燃烧模型，定义带化学组分混合与反应的湍流流动边界条件，使用分离求解器初始化并求解燃烧模型，得出了新型燃气热水器内温度场、压力场的分布，以及燃烧过程CH_4、O_2、NO等气体质量分数浓度分布，通过这些分布，得出了温度场和各种燃烧组分的特点及设计中需要注意的一些问题；通过在软件控制面板改变空气流速，得出了不同过剩空气系数下燃烧温度及各种气体质量浓度分布的差异；另外，通过对热水器的引射器进行计算，发现其不能满足引射能力的要求，建议选用完全预混负压吸气引射器，并计算出了其尺寸。
With the numerical simulation, we have gotten the variation of the equivalent under different conditions of the various types of flow field, then analysized the flow field around the relative wind speed, turbulent kinetic energy, pressure and other characteristics of the flow field of comparative of a sparse forest roughness and structure of the protective forest belt effects.
通过数值模拟，得到了不同条件下各类流场的等值变化图，然后对绕林流场中的相对风速、湍动能、压力场等流场特征进行了分析比较，分析了林带疏透度和粗糙度等林带结构特征对防护效应的影响。
The experimental results show that the single-phase frictional pressure drop in narrow annuli is higher than that in normal circular tubes when the convection is in laminar area, and they two are similar in turbulent area. In heat-exchange conditions, the flow frictional curves put up levity characteristics, which bear not only on the peculiar structure of narrow annuli but the changes of viscidity and density of working fluid.
实验结果表明：水在窄环隙内流动摩擦阻力在层流区比普通圆管的流动摩擦阻力大；在紊流区二者差别不大，而且在换热条件下，窄环隙内的流动阻力曲线表现出多变特性，这种阻力特性不仅与窄环隙特殊的结构有关，而且也与进出口温差造成的粘度和密度的变化有关。
Based on the theoretical analysis of the kinetics mechanism about the turbulent flow structure, the mixing time would be effected dominantly by the eddy diffusion of mainstream and the controlling index has been pressented in this paper.
从紊流结构分析混凝动力学机理，提出主流区的涡流扩散对混凝时间起主导作用，并导出了混凝综合控制指标，通过试验对比，进一步证实了该指标的实用性。
Based on the extended Huygens-Fresnel principle, the Hufnagel-Valley profile model of the turbulence which is dependent on altitude, and the wave structure function under all conditions of atmospheric turbulence, the mutual coherence function of quasi-monochromatic Gaussian Schell-model beams propagating in the slant path through turbulent atmosphere is derived analytically.
由广义惠更斯菲涅耳原理、随高度变化的Hufnagel-Valley湍流廓线模型以及波结构函数在任意湍流条件下的近似表达式，导出了斜程传输时准单色高斯谢尔光束互相干函数的解析式。
This article analyzed the background of his Antisystemic Movements Theory: the emergence of social movement and national movement in large scale, the disintegration of Two-pole Structure, the coexisting of peaceful and turbulent world, the emergence of globalization and Anti-globalization movement.
本文分析了沃勒斯坦的反体系理论形成及发展的主要背景：社会运动和民族运动在世界范围内兴起，世界两极格局瓦解，和平与动荡并存，全球化及反全球化运动的兴起。
The assumption of unity Lewis number in the flamelet model of turbulent combustion is examined and the influence of differential diffusion and radiation on the flamelet structure, nitric oxide emission and extinction limit is investigated.
对拉伸层流扩散火焰面进行了数值模拟，考察了在以往湍流燃烧的火焰面模型中，假定Lewis数等于1的可靠性，研究了不同分子扩散和火焰辐射对火焰面结构、氮氧化物排放和熄火临界的影响。
Combined the laser technology with the digital image processing technology, a novel approach to measure the structure of turbulent flow and flame was developed in this paper.
基于以上理论和实际应用背景，本文结合激光技术和计算机数字图像处理技术，开发了新型流场测量手段。
Flame structure of turbulent premixed combustion for gasoline engine has the feature of self-similarity of fractal geometry.
汽油机湍流预混燃烧的火焰结构具有分形几何的自相似性。
By the laser tomography technology and the digital image processing technique, the experimental studies on the structure and extinction characteristics of turbulent counterflowing premixed flame were carried out.
利用激光层析技术和数字图像处理技术对对冲方式下湍流预混火焰的结构及熄火特性进行了试验研究。
A new kind of gas phase turbulent reaction model is developed in which the solving process is considered as well as the physical and chemical aspects of the process. The moisture evaporation, agglomeration and breakup, devolatilization, char reaction and pollution formation, heat and mass transfer are included in the model. The spray combustion process in a 230 t/h utility boiler is modeled. The results include the gas flow field, the dispersion characteristics of spray. The motion and combustion history of CWS droplets, the ignition law, the combustion efficiency and the temperature of the spray are also important results. The model results are used to design and test the arrangement and structure of the burners and furnace.
模型对水煤浆滴水份蒸发，结团和破碎，挥发份析出，焦炭燃烧，污染物形成，传热传质等水煤浆燃烧过程涉及的物理和化学问题进行了模化，结合挥发物和焦炭燃烧产物进一步氧化燃烧，流动，炉内辐射传热等子模型综合地模化了水煤浆的雾炬燃烧过程，数值试验的结果与部分试验结果进行了比较，表明所计算的水煤浆雾炬的扩散，运动和燃烧规律，水煤浆着火规律，燃烧效率，燃烬率变化规律等，在定性和定量方面都与实际燃烧过程具有较好的一致性，已对白杨河电厂230T/H锅炉改燃工程的设计和运行产生指导意义，并能为今后的燃烧器的设计，燃烧室的设计，燃烧试验和运行提供理论依据，为进一步发展深入的模型提供了一个基础。
A large range of IRZ and intense fluctuating velocity area around the boundary of IRZ is measured and thought to be important to keep the excellent ignition and combustion characters of the new kind swirl burner. Together with temperature trace method, different structure and operation parameter of the burner are studied in this paper about their effects on turbulent and mixing characters of swirling jet. The structure variation includes different blade angle, use of central gear shape baffle, variable outer length and angle of lean primary air outlet, use of wedge outlet of lean primary air.
采用上述两种测量方法并结合热质比拟温度示踪的方法，本文对径向浓淡旋流煤粉燃烧器喷口结构和气流流动参数的变化对旋流流场的流动、混合、湍流脉动特性的影响进行了深入研究，研究了旋流叶片倾角大小、中心齿型扩锥、淡一次风扩口外伸长度和扩角的变化、淡一次风楔形扩口、直流二次风扩口角度的变化对出口旋转射流流动特性的影响，研究了一次风率和旋流二次风率运行参数变化的影响规律。
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, the theoretical modal of optical intensity distribution on the focal plane for focused hollow vortex beams with a Gaussian background propagating in turbulent atmosphere was investigated and obtained. The effects of atmospheric index structure constant C2n, topological charge, focal length and beam wavelength on optical intensity distribution on the focal plane were analyzed.
运用广义惠更斯-菲涅耳原理和相位结构函数的平方近似，研究了聚焦高斯空心涡旋光束通过湍流大气传输后在焦平面内的光强分布的理论模型，同时分析了不同大气折射率结构常数C2n、聚焦距离、光束拓扑荷和湍流外尺度对焦面光强分布特性的影响。
In this paper, the new idea simultaneously using the Planar Laser Induced Fluorescence technique and the Acoustic Doppler Velocimeter technique is applied to research the coherent structure of turbulent boundary layer.
本文在评述紊流边界层拟序结构研究现状的基础上，受前人研究工作的启发，提出了使用平面激光诱导荧光技术与声学多普勒测速技术相结合的方法同步观测和研究紊流边界层拟序结构的新思路。
The turbulent diffusion is found to have important effects on the structure of the solar convection zone.
借助日震学的观测结果，我们在太阳内部测定了Reynolds应力模型中涉及到的自由参数的取值情况。
The third chapter was to investigate the wave characteristics of the coherent structure in turbulent jet diffusion flame.
第三章对湍流射流与火焰大涡拟序结构的波动特性进行了研究。
Cut into short lengths and cooled by turbulent air flow, these microfibers are then formed into a complex weblike structure on a moving conveyor screen.
它不同于纱线的形态，而是被切断的短纤维，通过气流冷却并铺散到一条传输带上，成为复杂的网络结构。
Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.
基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。