燃的

In some extent, increasing the area of fuel nozzle will be improve the combustion efficiency of DR; 3, the angle between dual air-inlets have complex influence with the combustion of DR.

研究结果表明：(1)补燃室头部距离的增加能增强补燃室头部回流以及提高燃料在补燃室后段分布的均匀性，但也减少了燃料与空气在补燃室后段进行掺混和燃烧的长度：(2)在一定范围内，增加一次燃气喷嘴面积能提高冲压发动机燃料的燃烧效率：(3)进气道夹角对冲压发动机中燃料的燃烧影响复杂，对于采用对称结构喷嘴的冲压发动机，当进气道夹角等于180°时，燃料与空气的掺混效果最好；而对于一次燃气喷嘴采用不同偏心结构的冲压发动机，补燃室内流场与燃料燃烧效率随进气道夹角变化的规律基本相似。

Some conclusions are followed:(1)the reaction ratio of boron is 12% in primary combustion;(2)the degree of agglomeration can be decreased adopting boron coated with AP;(3)the content of oxygen is very important for afterburning efficiency;(4)the afterburning efficiency will be changed with different air-gas ratio;(5)the head distance of after-burning chamber is increasing, the circumfluence in the head of after-burning chamber is stronger and the distribution of fuel backward the after-burning chamber is more well-proportioned.(6)the combustion efficiency of DR will be improved by increasing the area of fuel nozzle.(7)the angle between dual air-inlets have complex influence with the combustion of DR.

通过本项研究，取得如下结论：（1）一次燃烧硼反应比例在12～15％之间；（2）AP包覆硼，可以降低硼结团度，有利于一次燃烧喷射效率的提高，也有利于硼在补燃室进行二次燃烧；（3）进气空气中的氧含量对二次燃烧非常重要；（4）对于一定配方的含硼富燃推进剂，不同的空燃比，二次燃烧效率不同；（5）补燃室头部距离的增加能增强补燃室头部回流以及提高燃料在补燃室后段分布的均匀性；（6）在一定范围内，增加一次燃气喷嘴面积能提高冲压发动机燃料的燃烧效率；（7）进气道夹角对补燃室内燃料的燃烧影响复杂。

The latest type explosive motor utilizes cheap low qu***ty fuel Low temperature complete combustion, By means of warmhearted water Gasify to absorption of heat to lower the temperature supercharge , Promoteing the gas motor dos .

在释放阶段，外燃（200年前的蒸汽机）——内燃（100年前的内燃机）——爆燃是完全不同的，根本不在一个层次）。但也只有比较才易于理解：理论空燃比、充分的混合这些条件是任何现有热机都可望而不可即的。

Aimed at solving the problem that high content of unburned carbon in fly ash is unfavorable for its comprehensive utilization in large scale, the fundamental principle of flotation for recovery of unburned carbon from fly ash was theoretically analyzed and the full flotation flow for the recovery of unburned carbon from fly ash was tested.

针对粉煤灰中未燃炭含量过高不利于大规模综合利用的问题，从理论上分析了浮选回收粉煤灰中未燃炭的基本原理，采用全浮选流程对粉煤灰中未燃炭进行了浮选回收试验，探讨了影响粉煤灰中未燃炭浮选效果的主要因素，确定了适宜的工艺条件。

NO_x decreasing ratio of micronized coal reburning comparing withgeneral combustion is not proportionable to NO_x reduction ratio in reduction zone,which depends on both NO_x reduction ratio and NO_x increment in burnout zone.

超细粉再燃与常规燃烧相比NO_x脱除率与再燃区NO_x还原率不成正比，它是由NO_x还原率与燃尽区NO_x新的生成综合决定的。

Aimed at the thermal crack and breakdown caused by the excessive thermal load of nozzle of former spheric precombustion chamber for diesel engine 12V180, the theoretical analysis and experimental research are conducted in this paper.

针对 12V180柴油机原球形预燃室喷嘴因热负荷过大而产生热裂和断裂脱落的问题，进行了理论分析和实验研究，提出了一种新型的预燃室———超小型水滴形预燃室。

Existing calculation methods for burning surface don't well agree with the experimental data with complicated grain. In order to eliminate the error, tests data are used to correct the prefigurative result generally, and it is impossible to calculate burning surface of grain with crack.debond and wtith changing burning rate of propellant.

目前现有的固体装药燃面算法，在计算复杂装药燃面时仍有较大误差，为消除这种误差往往需要用试车结果给予修正；同时在计算含缺陷装药燃面和处理装药因批次燃速变化时的燃气加质更是束手无策。

But in practical operating, overvoltage caused by reignition of the vacuum switching device frequently appears, and it result in damage of the capacitor bank or the switchgear itself. Ensuring the switchgear against reignition and installing a protective device are two main approaches to avoid the phenomenon. In this paper, a study on overvoltage caused by reignition due to capacitor bank switching with the vacuum switching device and its preventive measures are carried out. The main work which has been done and researches are as follows: 1. The producing mechanism of overvoltage and its influence factor are analyzed. It is pointed out that single-phase reignition is the main reason for damage of the switchgear and two-phase reignition is the main reason for damage of the capacitor bank,so overvoltage of single-phase reignition and two-phase reignition are the emphases of prevention. 2. Analysis of the special working condition of the operating switch for capacitor bank is carried out. It indicates that the vacuum switching device is difficult to realize no-reignition under this operation condition, so it is more practical to adopt protection devices. 3. Analyses of protection effect of RC and MOA and their shortages are carried out. It shows that the two methods can only restrain effectively overvoltage caused by single-phase reignition, and they cannot protect the capacitor bank when reignition of two-phase occurs. 4. The operation principle of G-R damping device is analyzed and discussed emphatically.

本文针对真空开关投切电容器组时因重燃而产生的过电压及其防治措施进行了研究，所开展的主要工作和研究结果如下： 1、对过电压的产生机理及其影响因素进行了分析，指出单相重燃是导致开关设备损坏的主要原因，而两相重燃则是导致电容器组损坏的主要原因，因此单相重燃和两相重燃过电压是防护的重点； 2、对电容器组操作开关的特殊运行条件进行了分析，指出在这种运行条件真空开关难于实现不重燃，因此采用保护装置更具有现实意义； 3、对RC与MOA的保护效果和存在的不足进行了分析，指出这两种方法均只能有效抑制单相重燃过电压，而不能在发生两相重燃时保护电容器组； 4、重点对G-R阻尼装置的工作原理进行了分析和讨论，指出该装置接入后线路中将会出现两种频率的高频振荡，而电容器组上的过电压是由这两种振荡共同决定的； 5、根据对上述两种振荡的分析指出存在一个最佳电阻值使得过电压最低，并提出了电容器组电压和最佳电阻值的近似求解方法； 6、使用电气暂态分析软件MATLAB对G-R装置的保护效果进行了仿真计算，证实该装置确实可以有效抑制重燃时的电容器组过电压； 7、根据仿真与近似计算结果的偏差提出了近似计算的修正方法，经过修正后的过电压计算结果与仿真结果吻合较好； 8、对G-R装置中放电装置G与阻尼电阻R的要求进行了分析，指出采用编织电阻和真空间隙可能是最佳选择。

In order to understand better the process of hydrocarbon formation and the effect of the top land crevice and the oil layer of the cylinder liner on unburned hydrocarbons during cold start and idling period,the temperature of piston top land and liner has been measured.

为了更好地弄清起动和怠速时发动机缸内未燃碳氢生成过程以及顶岸间隙和油膜对缸内未燃碳氢的影响，测量了起动和怠速过程活塞顶岸壁面和缸套壁面温度。根据测量结果，预测了起动过程顶岸间隙和壁面油膜处未燃碳氢生成量，发现顶岸和缸套壁温在发动机起动后（150～200）s时达到其稳定状态。

Where,the cook-up process of missiles is analyzed and,the heat transfer model is established,the cook-off time-temperature process is simulated.

介绍了舰载导弹发射舱相邻舱室起火时火源对舱内导弹的烤燃研究方法，分析了影响烤燃过程的各种因素，建立了一般烤燃传热数学模型，模拟计算了某型导弹烤燃时间—温度的变化过程。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。