喷气

The application of the gas turbine to jet propulsion has avoided the inherent weakness of the rocket and the athodyd, for by the introduction of aturbine-driven compressor a means of producing thrust at low speeds is provided.

应用燃气轮机于喷气推进避免了火箭和冲压喷气发动机固有的弱点，因为通过采用涡轮驱动的压气机提供了低速时产生推力的一种手段。

In fact, the jet propulsion engine, whether rocket, athodyd, or turbo-jet, is a piece of apparatus designed to accelerate a stream of air or gas and to expel it at high velocity.

实际上，喷气推进发动机，无论火箭、冲压喷气、或者涡轮喷气，都是设计成加速空气流或者然气流并将其高速排出的一种装置。当然，如第2章中描述的那样，这样做有不同的方式。

Where supersonic speeds are encountered, such as in the propelling nozzle of the rocket, athodyd and some jet engines (Part 6), a convergent-divergent nozzle or venturi fig.

在遇到超音速的场合，如火箭的推进喷管，冲压式空气喷气发动机和某些喷气发动机(第6章)。

Of the other members of his team, Laufer went to France after the war and joined SNCASO, where he worked on the jet-propelled Djinn, and Stepan went to England, where he joined Fairey and also does work connected with jet-propelled rotary wings.

对他的团队的其他成员，劳费尔前往法国在战后加入SNCASO，他在喷气推进灯灵工作，并斯捷潘到英国，在那里他加入了费尔雷，也没有与工作有关的喷气推进旋转翼。

Furthermore, a plan of designing the small model having a step bottom is provided in the experiment of restricting model. And a plan of jetting from foreside and middle part of the large scale model is adopted in experiment, all these are our innovative points.

此外，在小比尺模型试验中，还提供了一种断阶喷气试验设计方案，在大比尺模型试验中，采用了首中部同时喷气的方法，这些都是本文试验的创新之处。

The test results showed that under low ambient temperature and aphotic storage conditions jet fuel exhibited good color stability.Oxidation reactions,such as photo-catalyzed oxidation and radical oxidation,were the main reaction mechanism of color degradation,and copper played an important role in catalyzing the oxidation reactions.Under static thermal stability testing condi...

试验结果表明，喷气燃料在较低温度、无光储存条件下具有很好的颜色安定性；氧化反应是导致喷气燃料颜色变深的主要反应机理；静态热安定性试验条件下，喷气燃料的颜色随氧化时间呈相对稳定的加深趋势；氧化铝吸附脱除了喷气燃料中的一些原有氧化抑制剂，使喷气燃料在较高温度、有氧条件下易于发生氧化反应；铜在喷气燃料氧化变色反应过程中具有明显的催化作用。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

Through the experiment carried out in a water pot under conditions of different shape dimension, section figure of air emitter belt and the quantity of air, the research on how these conditions effect the resistance is done, and the actual resistance values of the bubble screen air emitter belt are also got.

通过在水筒中进行的气幕喷气环阻力性能试验，就喷气环的外形尺寸、截面形状和喷气流量对阻力的影响进行了研究，得到了所研究气幕喷气环的阻力数据。

As there are no differences in doctrines between piston-engine and jet-propelled aircraft the effects of Jet doctrines are generic and hence their name Jet Age.

由于活塞引擎和喷气推进飞机学说没有不同，喷气学说的效果是一样的，因此它们被命名为喷气时代。

The types of jet engine, whether ram jet, pulsejet, rocket, gas turbine, turbo/ram jet or turbo-rocket,differ only in the way in which the 'thrust provider', orengine, supplies and converts the energy into powerfor flight.

不同类型的喷气发动机，无论冲压喷气、脉冲喷气、燃气轮机、涡轮/冲压喷气或者涡轮-火箭，其差别仅在于&推力提供者&即发动机供应能量并将能量转换成飞行动力的方式。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。