真空羽流膨胀迅速。
高射流压力和射流角增加羽流涡度，激波位置较高。
The vortices of the plume and the height of the jet interaction shock increase with increasing incidence Angle and jet pressure.
羽流可延伸到汽缸膛中对应于活塞位置的一段距离。
The plume may extend into the cylinder bore a distance corresponding to the piston position.
获得水力学服务以评估地下水氚羽流并确认跟踪羽流。
Obtained the services of a hydrologist to evaluate the groundwater tritium plume and to make recommendations for tracking the plume.
然而带电火山灰是在厚重的火山羽流中间被发现的，而不是在边缘。
But the electric volcanic ash was found in the middle of the thick plume, not on its edges.
同时，计算了烟气羽流各截面的质量流量和热流密度。
At the same time, the mass flow rate and the heat flux density of each cross section of smoke flow were calculated as well.
阐明了用数值模拟的方法研究羽流问题的必要性和迫切性。
Simply states the necessity and urgency to study plume, specially with numerical simulation methods.
火箭发动机排气羽流的影响是研制火箭运载器的一个关键问题。
The plume effects of rocket engines is the crux of developing a launch vehicle.
纵横比为1.5时，气泡羽流中部的运动形态及结构极不稳定；
The pattern and structure in the middle part of bubble plume is instability when the aspect ratio of 1.5;
热压自然通风中，热源产生的浮力羽流使得室内存在热分层现象。
In thermal natural ventilation, buoyancy plumes derived from heating source make the thermal stratification indoors.
首先，结合羽流卷吸经验公式，讨论了火源释热速率的计算方法；
Firstly, combined with McCaffreys empirical formulas for plume entrainment, the calculation method of heat release rate of the fire source is discussed;
纵横比为2.0时，气泡羽流的顶端的运动形态及结构极不稳定。
The pattern and structure in the upper part of bubble plume is instability when the aspect ratio of 2.0.
火羽流涡旋结构的详细分析对火灾蔓延特性的研究有重要指导意义。
Detailed analysis of vortical structure in fire plume has an important significance in the research of the spread of fire.
羽流可具有与其相关联的燃料量并在角跨度内维持燃料量的至少30%。
The plume may have a fuel volume associated therewith and may maintain at least 30 percent of the fuel volume within the angular span.
计算结果对以后MPT真空羽流场测试和航天器一体化设计提供了参考。
The results can provide reference for the testing of MPT vacuum plume and integral design of spacecraft.
在大气层某一定的高度以上，火箭后体上的边界层将会由于羽流引起分离。
Above some altitude within atmosphere layer, the boundary layer on after body will separate due to plume.
姿态控制发动机真空环境下工作产生的羽流对航天器造成的影响非常明显。
The plume from the attitude controlling rocket motor nozzle has an obvious effect on the aircraft in vacuum.
从涡量输运方程出发，分析得出拉伸项的存在降低了轴对称热羽流的混合强度。
The stretching term in the vorticity transport equation is found to be the main mechanism to reduce the degree of mixing in axisymmetric plume.
声压级在相交激波点附近出现剧烈变化，喷管出口处的激波和排气羽流造成强噪声。
The sound pressure level changes acutely in shock intersection, and shocks outside nozzle and exhaust plume cause strong noise.
并对燃烧后的烟气羽流的上升速度，羽流上升过程中温度下降幅度产生不同的影响。
Then it will affect the plume's ascending velocity and the temperature drop scope in the plume rise process.
对静止环境中的圆形气泡羽流流场进行数值模拟，得出了气泡羽流的流速场和浓度场。
Numerical simulation of round bubble plumes in still environment is performed to obtain the distribution of velocity and gas holdup.
浮游植物需要养分进行繁殖，而藻华的出现往往与给洋面带来营养物质的事件相联系，譬如灰尘羽流。
Phytoplankton require nutrients to reproduce, and phytoplankton blooms are often tied to events that bring nutrients to the ocean surface, such as dust plumes.
通过选择不同的气体分子与壁面相互作用模型研究了壁面边界条件对羽流撞击效应的影响。
Influence of wall boundary condition on plume impingement effects is finally studied by applying various gas - (surface) interaction modeling.
采用粒子网格单元与蒙特卡洛碰撞相结合的方法，建立霍尔效应推力器羽流的二维轴对称模型。
A two-dimensional axisymmetric hybrid particle-in-cell and Monte Carlo Collision model is developed to study the Hall effect thruster plume.
根据动量叠加原理对多股等羽流的相互作用进行了研究，定义了三个速度修正系数和流量修正系数。
Researches the interaction of the multiple equal plumes based on the principle of momentum congruence. Defines three velocity correction coefficients and a flow rate correction coefficient.
火箭羽流会造成噪声、烟雾、热辐射、环境污染和信号衰减等多种效应，因此研究排气羽流问题至关重要。
The rocket exhaust plume causes the effects of noise, smoke, flame and heat radiation, environment pollution and signal attenuation, etc. So it is important to study exhaust plume.
霍尔推力器羽流中的离子能量分布情况对于评估推力器羽流影响，优化推力器在航天器上的布局具有重要意义。
The ion energy distribution in the plasma exhaust plume of a hall thruster is important to evaluate the influence of the hall thruster plume and optimize the thruster position on the spacecraft.
粉末通过具有扁平横截面的管道（5）分配，以使聚结的粉末散开并用于产生具有细微颗粒尺寸的喷羽流（3）。
The powder is dispensed through a duct (5) with a flat cross section to deagglomerate the powder and to generate a spray (3) with fine particle size.
微波等离子推力器（MPT）是一种新型的电热型推力器，它具有比冲高、寿命长、羽流污染小等优点，具有广阔的应用前景。
Microwave Plasma Thruster (MPT) is a new type of electro-thermal thruster, which has widely applied prospect because of its high specific impulse, long lifetime, low plume contaminant and so on.
实验过程中发现，推力器过热致使通道壁面变红，羽流颜色变成紫红色、阴极过热失效、阳极击穿等恶劣现象，甚至导致推力器熄火。
It is founded, in experiments, that thruster overheated make channel wall in red, plume into the color purple, cathode overheating failure, anode breakdown, and etc, even leading to thruster flameout.
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