查询词典 combustion

In this thesis, by the means of calefactive oxidation test of coal samples, the characteristics of different samples spontaneous combustion are analyzed; the infrared spectrum is assimilated to review the rule that coal function corps change in the process of coal low-temperature oxidation ; by the means of thermal analysis by differential scanning calorimeter, thermogravimeter, the kinetic function of coal low-temperature oxidation in spontaneous combustion process are analyzed , depend on the device, the mathematical model of coal spontaneous combustion is developed, the model are dealt with, Finally, the temperature field and the velocity field with velocity of the entry flow is got.

论文通过煤的低温氧化和自燃过程，实验研究了煤的低温氧化气体产物特征和变化规律，研究得出了煤的低温氧化过程中气体生成量与氧气消耗量与煤温之间的指数关系式；在煤的低温自热氧化过程中，对煤的官能团等化学结构的变化研究，揭示了煤炭低温自热氧化化学基团变化规律；采用非等温TG和DSC法研究了烟煤低温氧化动力学，得出了煤低温氧化分布活化能及煤低温氧化机理函数的变化规律；建立了煤低温氧化自热数学模型，并对该模型进行数值解算，可得煤样的温度场与速度场随入口风量变化情况。

Also, our experiments have studied the combustion catalysts for the catalytic domestic boiler, have chosen the suitable catalysts and changed the structure and combustion method to reach flameless combustion.

本实验还对催化热水器的催化剂进行了性能研究，选取了最佳的催化剂，并改变了现有天然气热水器的结构和燃烧方式，达到了无焰燃烧。

Considering a spherical porous carbon particle immersed in a static ambient atmosphere, the combustion characteristics under three basic conditions: frozen flow, equilibrium flow, partial flow are solved in a half-analytical and half-numerical way. By using the LAEA (Large Activation Energy Asymptotic Method), the departure value of some parameters such as combustion rate, temperature, and concentration are obtained. On this basis, the rules of a carbon particle combustion under various conditions when the gas phase Damk〓hler number is in the range of 0,+∞ are summarized.

建立氧化性环境中相对静止的多孔炭粒燃烧的控制方程，采用半解析、半数值方法求解出炭粒在冻结流、部分流、平衡流三种基本情况下的燃烧规律，并采用大活化能渐近匹配方法，计算出偏离冻结流、偏离平衡流情况下燃烧速率、温度及组分浓度等参数的偏离解，进而总结出炭粒在气相Damk〓hler数为0，∞整个范围内燃烧特性变化规律。

The boundary condition of the isochoric combustion process can be precisely controlled. And the disadvantageous influence on the isochoric combustion of the engine is avoided. Therefore, the combustion process and the factors of the influence on it can be clearly found.

可以实现对定容燃烧过程边界条件精确控制，剔除点燃式发动机定容加热过程中众多杂乱影响因素，从而清晰地反映出燃烧过程及其影响因素的作用。

After adding different metal compounds (K2CO3, NaCl and Al2O3), the sludge ignition point had a certain drop and the characteristics combustion index are also changed, indicating the combustion performance of the sludge was improved. Different metal compounds behave different katalysis at different combustion stage. And K2CO3 performs stronger catalytic capacity than that of NaCl and Al2O3 in the whole process.

污泥添加不同金属化合物K2CO3、NaCl和Al2O3后，其着火点有一定的下降，对污泥的燃烧有促进作用；不同金属元素化合物的加入对污泥燃烧性能有一定的改善，并且在燃烧的不同阶段金属化合物表现出不同的催化能力，其中K2CO3的催化性能强于NaCl和Al2O3。

The high frequency combustion instability in liquid rocket engine LRE is analyti cally studied by usin g CFD methods.The comprehensive model and governing equations for numerical simu lation of high frequency combustion instability are presented.The PISO and MacCo rmack algorithms are compared in this study.Both methods can successfully handle combustion instability analysis.

应用CFD方法对液体火箭发动机中的高频燃烧不稳定性进行了分析研究，建立了液体火箭发动机不稳定燃烧数值模拟的综合模型和控制方程，比较了PISO和Ma cCormack两种算法，得出了两种算法均能成功应用于不稳定燃烧分析的结论。

Thus, the physicomathematical model is established to describe the combustion and flow behavior inside the combustion chamber, the second combustion chamber and the nozzle of the solid fuel ramjet.

采用二阶矩湍流燃烧模型，有效克服了常用的E—A模型、简化PDF模型等均无法正确描述固体燃料冲压发动机中化学反应速率和扩散速率处于同一量级的现象。

In recent years, combustion researchers have increasingly taken cognizance of the importance and pressing of study on micro-combustion, especially on catalytic combustion of methane in micro-scale.

近年来，燃烧工作者已经越来越清楚的认识到对微尺度燃烧进行研究的必要性，尤其是甲烷的微尺度催化燃烧，到目前为止，国内还没有其他单位开展过这方面的研究。

In the model, the combustion issues of social system are analogized to the combustion phenomena in the nature, and the social stability level is measured with the combustion possibility of social system.

从社会系统的不稳定角度出发，在利用社会系统易燃程度对社会系统的稳定水平进行度量的基础上，构造了社会系统稳定性的调控机理模型。

The results show that proper reentrant combustion chamber can effectively organize and control the flow distribution and intensity in the combustion chamber. There exists an optimized fuel injection position and intake swirl ratio for this kind of combustion chamber to decrease engine emission without scarifying engine power output and fuel economy.

结果表明，通过低排放缩口型燃烧室结构参数的优化，可有效地组织和控制燃烧室内气流分布规律及其强度，而且对于这种燃烧室结构存在着最佳的喷射位置和进气涡流强度，使得在动力性和经济性基本保持不变的条件下，可有效地改善柴油机的排放特性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。