查询词典 ignition

The plasma ignition threshold of metal is got through experimental and numerical study. The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air .

从热传导方程和雪崩电离机制出发，假设当电子增值210倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q－YAG激光器（波长1064nm，532nm，355nm，脉宽10ns），靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随著波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

This kind of ignition is"flame of line shape like"ignition, in which, the phenomenon of 3-D flame propagation has been observed.

我们称这种激波管为分部式激波管，本文成功地实现了这种分部式激波管的运行。

The ignition of the solid rocket motor is a very complex physical and chemistry process, which is composed of three component phases: ignition delay, flame spreading and chamber filling.

固体火箭发动机的点火是一个十分复杂的物理化学过程，包括三个阶段：点火延迟、火焰传播和燃烧室气体充填。

Plasma ignition system can ignite pulverized coal and stabilize flame without any oil, which is an important means to save oil used for the boiler ignition, flame stabilization and commissioning. It can be used to effectively reduce the cost of power generation, save oil resource and enhance the energy security for China.

等离子点火装置可以在完全不需要任何燃油的情况下达到点火及稳燃的目的，是一种有效节约锅炉点火、稳燃和调试用油的手段，对降低发电成本、节约油资源、增强国家能源安全有很大意义。

A new ignition system is applied to pulse detonation engine, which is a flame jet ignition system, to enhance a deflagration to detonation transition time and length.

为了缩短爆燃向爆震转捩的时间和距离，该文将一种新型点火系统－火焰喷射点火系统应用于脉冲爆震发动机。

The successful kerosene ignition and flame stabilization is obtained by using plasma ignition,cavity flameholder and wall injection fuel.

研究表明，在燃烧室进口M=2、总温T0=960K时，采用大功率等离子体点火器，不需要先锋燃料，可以直接点燃煤油。

The variety of the oxygen concentration will make the great influence to the coal combustion. The enhance of the oxygen concentration is able to reduce ignition heat 、 ignition-temperature and increase reaction velocity 、 flame temperature which will promote combustion completely.

氧气浓度的变化对煤粉燃烧产生很大的影响，增加氧气浓度会降低着火热和着火温度，增加反应速度、提高火焰温度、促进完全燃烧。

According to heat flux potential function and zero-dimensional thermal model, the cusp Catastrophe model is established and the ignition property is discussed. The cusp Catastrophe model, which considers furnace temperature as state parameter and airflow flux and air temperature as controlling parameter, can explain ignition and unsteady phenomenon well.

以热流势函数建立了零维尖点突变模型，突变模型以炉膛温度为状态变量﹑高温空气温度和空气量为控制变量的，可以较好地解释高温空气回转窑内着火的复杂现象和系统出现的不稳定状态。

The traditional refitted ignition products (for example, high-pressure cylinder line without diffraction, refittedly-complicated products that mix the spark plug and ignition power) are the primang products with no dynamic adjusted ability, which can't meet different requirements of motor under different conditions, thus impossibly causing the motor to be in the best condition.

传统点火改装产品（如：无内阻高压缸线、改装用火花塞及仿冒点火王动力复合仪等产品）均为无动态调节能力的初级改装产品，无法动态满足发动机在不同工况下的不同需求，因而无法使发动机持续工作在最佳状态。

In this work numerical scheme for the ignition and combustion process of DME homogeneous charge compression ignition is studied.

本文以新型发动机代用燃料二甲醚为例，对HCCI发动机燃用DME的着火和燃烧过程进行了研究。

There are two types of gold deposits in this area, namely altered rock type and quartz vein type.

本区金矿床包括两种类型：柴胡栏子金矿床为蚀变岩型金矿；莲花山和红花沟金矿床属石英脉型。

You were home and it was two weeks ago.

你回到了家里。当时是两周前。