查询词典 precombustion

Stable combustion was achieved with the application of the precombustion chamber applying nonsymmetrical jets and the multistage nozzle.

采用本实验室发展的偏置射流预燃室技术和多级气动喷嘴技术实现了黑液煤浆的点火和稳燃。

Cold flow field in the precombustion chamber applying nonsymmetrical jets was investigated by numerical means. Conditions favorable for CWS ignition and combustion were analyzed. Optimal geometry and operation conditions of precombustor were presented for multistage nozzle jet and internal-mixing nozzle jet, respectively.

对本实验室发展的水煤浆偏置射流预燃室进行了用水煤浆燃料时两相冷态流场的数值模拟，探讨了适合于水煤浆点火和稳燃的条件，并通过大量的计算，分别初步优选出适合于多级气动喷嘴雾炬以及ZN型喷嘴雾炬的较好预燃室结构和操作工况。

The development,application and evolution of precombustion chamber burners were discussed.

论述了预燃室型燃烧器的研制、应用和发展过程，分析总结了预燃室型燃烧器在实际应用中的优缺点，重点讨论了该类燃烧器设计及应用中应注意的问题。

Pulverized-coal-fired precombustion chamber is a kind of new coal burning equipment.

煤粉予燃室是一种新型的煤粉燃烧方式。

Far more complicated is precombustion carbon capture, which involves completely redesigning plants.

煤燃烧前的碳捕捉要复杂的多，需要对电厂进行重新设计。

Pulverized-coal-fired precombustion chamber is a kind of new coal burning equip- ment.

煤粉予燃室是一种新型的煤粉燃烧方式。

Liquid propellant rocket engine ; Precombustion chamber ; Turbulence model ; Three dimensional flow ; Numerical simulation

液体推进剂火箭发动机；预燃室；湍流模型；三维流；数值仿真

A dedicated carburetor throat and tiny intake valves fed small precombustion chambers a rich air/fuel mixture that was easy to ignite.

一个专门的化油器喉咙和微小的摄入量小阀美联储预燃室丰富的空气/燃料混合物很容易点燃。

A new desulfurization apprach for pulverized coal combustion is introduced in this paper; pulverized coal is first burn in a precombustion furnace under oxygen deficient condition (about 30% air needed in boiler is provided for precombustion), in precombustion moust of sulfur in coal is decomposed and oxidized, and evolved, the sulfur evolved is trapped in a desulfurizing fluidized bed by calsuim, and then the char and gas are introduced to the boiler furnace for complete combustion.

本文提出了一种煤粉燃烧脱硫新方案，利用煤中硫优先氧化分解释出的原理，用少量的空气（大略为锅炉实际空气用量的30％），在一前置燃烧室中，使煤粉中硫的绝大部分被分解氧化，释放出来，释放出来的硫在脱硫流化床中被石灰脱硫剂脱除，未燃烧的炭粒与烟气再吹进锅炉膛中完全燃烧。

The results indicated that ultra-low nitrogen (0.001 0%-0.008 0%, w/%) in low alloy steel could be determined accurately under such optimized analytical conditions as follow: the addition of deoxidizing agent was less than 0.35%, multi-head milling cutter should be chosen and the milling depth was 1.4 mm while sampling, the mass percentage of argon was no less than 99.999 5%, the washing time was set as 8 s, the precombustion time was set as 3. 3 s and energetic precombustion energetic measure optical source mode is adopted.

结果表明，取样时控制脱氧剂加入量不超过0.35%且选用多刀头铣刀盘，铣样深度为1.4 mm；在氩气的质量分数不小于99.999 5%，冲洗时间为8 s，预燃时间为3.3 s，采用高能预燃高能测量光源方式等优化的分析条件下，可有效测定低合金成品钢中质量分数为0.001 0%~0.008 0%的超低氮。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。