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表面燃烧
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  surface combustion
     Vital Factors on Surface Combustion Process Control for Gas-air Mixture
     煤气混合气表面燃烧过程的控制要素
短句来源
     The TiN formation is mainly combustion synthesis with molten Ti in the N2 gas in the process of reactive plasma spraying AlN/TiN multi-phases coatings, which belongs to surface combustion reaction of gas penetration combustion.
     反应等离子喷涂AlN/TiN复相涂层过程中,TiN的形成主要是熔融Ti在N2中燃烧合成形成的,属于气体渗透燃烧的表面燃烧反应,其燃烧机制是金属Ti和N2之间的通过反应生成TiN产物层进行的;
短句来源
     The heat transfer from coke by contact and by radiation amounts to 85 percent of the total heat flow, and the surface combustion temperature of the coke is the key factor affecting the efficiency in heating the molten metal.
     四种传热方式中,焦炭对铁水的接触传热与辐射传热共占85%左右,焦炭表面燃烧温度的高低对热交换有决定性的影响。
短句来源
     Control factors in surface combustion process of gas-air mixture are briefly analyzed.
     简要地分析了煤气混合气表面燃烧过程的控制要素。
短句来源
     a P-I radiation model is used for simulating radiation heat transfer,the Langrange/Euler's method is used for dealing with momentum,mass and energy exchange between the solid and the gas phase; the single rate model for devolatilization and the kinitics/diffusion limited combustion model for simulating surface combustion of pulverized coal particles.
     应用混合分数/概率密度函数法模拟湍流燃烧,用P-1辐射模型开展辐射传热模拟,利用拉格朗日/欧拉法处理气固两相间的动量、质量和能量交换,对挥发份的析出采用单步反应模型,采用动力/扩散反应速率模型模拟煤粉颗粒的表面燃烧
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  “表面燃烧”译为未确定词的双语例句
     Study and Application of Metal Fibre Combustion Technology
     金属纤维表面燃烧技术的研究与应用
短句来源
     Combustion synthesis coating on steel plate surface
     钢板表面燃烧合成涂层
短句来源
     Cermet composite coating on steel plate by combustion synthesis
     钢板表面燃烧合成的金属陶瓷复合涂层
短句来源
     According to the magnitude of average distance of oxygen molecular freedom motion at different temperature, comparing oxygen molecular diffusion rate of three kinds of diffusions through micropores, mesopores and macropores with combustion rate (CR) of pulverized coal char (pcc), it is shown that CR is less than transition diffusion rate, and less one or more orders than molecular diffusion rate on particle surface within 2000 K.
     根据不同温度下氧分子平均自由程的大小,比较了小孔、中孔和大孔中三种扩散速率与煤焦表面燃烧速度的大小。 研究表明: 2000 K以内,颗粒表面分子扩散速率比氧化反应速率大1个数量级以上,过度扩散速率不小于氧化速率。
短句来源
     Based on simultaneous thermal analysis,the combustion process of model medical waste(MMW) can be broadly separated into four stages: dehumidification,devolatilization and combustion of volatile matter,co-combustion of volatile matter and char,combustion of char.
     分析研究表明,模化医疗废物的燃烧过程可以分为4个阶段,即脱水干燥、挥发分析出和燃烧、过渡段和焦碳表面燃烧并存的过渡阶段、焦碳的表面燃烧
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  相似匹配句对
     Combustion synthesis coating on steel plate surface
     钢板表面燃烧合成涂层
短句来源
     Method on predicting burning surface temperature of solid propellant
     固体推进剂燃烧表面温度的预估
短句来源
     Architecture Surface
     建筑表面
短句来源
     Smart Surface
     智能表面
短句来源
     combustion & heat transfer;
     燃烧和传热;
短句来源
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  surface combustion
The processes of surface vaporization under the influence of an intense heat flux, artificial gas injection and surface combustion [4] are all worthy of study.
      
Ambipolar diffusion governs the discharge propagation at the stage of its evolution (t= 3-100 μs), and, finally, slow surface combustion is possible only at the stationary stage of the discharge (t >amp;gt; 100 μs).
      
Analysis of plane porous emitters with surface combustion and a heated article
      
Porous radiators with surface combustion in the filtration of a fuel-oxidant mixture
      
Calculation of plane porous radiators with surface combustion
      
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  surface burn
In many grinding applications, the material removal rate is constrained by the undesired thermal effects such as surface burn, tensile residual stresses, and micro-cracks on the ground parts.
      
Effect of thermodiffusion on intensity of surface burn-out in a heterogeneous turbulent boundary layer
      
Further investigation is necessary for the mapping of the total burn/wither and surface burn areas in East Siberia.
      
In June 2002, one half of the tree stands suffered from the surface burn.
      
Patients with surface burn resuscitated with 4 ml of Ringer's summit of Mt.
      
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The author's view is presented that the coke in a cupola functions not only as a fuel but also, and more important, as a medium of heat transfer. The key factor affecting the efficiency of the molten metal heating-up is the surface combustion temperature of the coke. Thus, the reactivity of the coke is important because it is closely related to the efficiency of the molten metal heating-up. The measuring device for the reactivity of foundry coke should be properly chosen in accordance with the actual operating...

The author's view is presented that the coke in a cupola functions not only as a fuel but also, and more important, as a medium of heat transfer. The key factor affecting the efficiency of the molten metal heating-up is the surface combustion temperature of the coke. Thus, the reactivity of the coke is important because it is closely related to the efficiency of the molten metal heating-up. The measuring device for the reactivity of foundry coke should be properly chosen in accordance with the actual operating condition of the cupola.

本文通过对冲天炉热交换过程的分析后指出,焦炭在炉内的作用不仅是作为燃料,更重要的是在铁水过热时所起的传热介质作用,尤其影响铁水过热效率的关键因素是冲天炉过热区内的焦炭表面燃烧温度。文中在进一步分析了冲天炉内燃烧特点后认为,确定反应能力是铸造焦的重要技术指标的依据是它直接影响了铁水的过热效率。文中最后指出,必须依据冲天炉实际工况制定出铸造焦反应能力的测试方法。

A new pressure-coupled response function of solid propellants has been theoretically derived by means of a combustion response model basing upon the steady-state burning model of composite solid propellants including those with negative pressure-exponents. In this combustion response model, the burning surface of a given propellant is divided into two parts, namely, one consisting of a region of the AP surface covered by molten binder with the corresponding binder surface and the other consisting of a region...

A new pressure-coupled response function of solid propellants has been theoretically derived by means of a combustion response model basing upon the steady-state burning model of composite solid propellants including those with negative pressure-exponents. In this combustion response model, the burning surface of a given propellant is divided into two parts, namely, one consisting of a region of the AP surface covered by molten binder with the corresponding binder surface and the other consisting of a region of the AP surface uncovered by molten binder with the remaining binder surface. In analyzing the part of AP surface covered by molten binder, the condensed-phase reaction and the opposed gasification of covered AP are considered. For plateau and mesa propellants, the real part of the pressure-coupled response function may be positive. The results calculated by the derived pressure-coupled response function for the S04-5A propellant are in reasonable agreement with the instability behavior observed experimentally. When the greater part of the burning surface is covered with the molten binder, the nonsteady state combustion can also occur. The combustion response model can be used not only to explain the instability behaviors of the plateau and mesa propellants, in contrast to the pressure-coupled response functions presented by previous investigators, but also to show that the steady-state burning model developed for composite solid propellants including those with negative pressure-exponents is reasonable and acceptable.

根据呈正、负压力指数燃速特性的固体推进剂的稳态燃烧模型,导出了一个新的压力响应函数公式,它可用来说明燃速压力指数为零、正、负各类推进剂的压力耦合现象。燃烧中的推进剂被划分为两部份:一部份是由熔化了的粘合剂所覆盖的氧化剂表面与其相对应的粘合剂表面所组成,而另一部份则由未被覆盖的氧化剂表面同剩下的粘合剂表面组成。与以往的各类模型不同,在上述的前一部份燃烧表面的燃烧中,考虑了氧化剂在熔化粘合剂覆盖的条件下存在着反向气化和凝相反应,故使所得的压力响应函数的实部在推进剂稳态燃速的压力指数为零或负值时也可为正值。利用所获得的压力响应函数的表达式对试验用推进剂(S04-5A)作了定量计算,计算结果满意地说明了,负压力指数推进剂在氧化剂被熔化粘合剂大面积复盖时也存在不稳定燃烧的现象。这不仅克服了以往所有压力响应函数表达式均难以用于负压力指数推进剂的缺陷,而且也从一个侧面反映了呈正、负压力指数燃速特性的固体推进剂稳态燃烧模型的正确性。

The combustion efficiency study was made of the partially burnt Purverizeb coal, sampled from the raceway before the tuyere of blast furnace either No.9 of AISC or No.2 of SISC. Results showed that the injected coal started to volatilize and burn just it has entered the blowpipe where seems to be an important preheating and precombustion space before the raceway, however, it could not be completely burnt out there in front of tuyere. In order to replace more coke by injecting more coal, the laboratory simulation...

The combustion efficiency study was made of the partially burnt Purverizeb coal, sampled from the raceway before the tuyere of blast furnace either No.9 of AISC or No.2 of SISC. Results showed that the injected coal started to volatilize and burn just it has entered the blowpipe where seems to be an important preheating and precombustion space before the raceway, however, it could not be completely burnt out there in front of tuyere. In order to replace more coke by injecting more coal, the laboratory simulation test on the combustion kinetics of the pulverized coal used by the above-mentioned two blast furnaces under conditions prior to tuyeres indicated technically possible by: pulverizing the coal down to 40 μm; enriching the blast with oxygen up to 30-40%; further raising the blast temperature; improving the injected coal distribution early in blowpipe; consistently injecting the coal at all tuyeres and selecting the variaty of coal of better combustibility, e.g., bituminous coal being superior to anthracite. Petrographic observation on coal samples prior to injection and after being partially burnt revealed that the bituminous coal burns violently and simultaneously not only on the surface but also in the interior of its particles, while the anthracite, especially, of SISC, mostly on the surface. Based on the theory of heat-transfer and mass-transfer, a set of mathematical model for combustion of pulverized coal has been derived. By substituting the combustion conditions of both above-mentioned two blast furnaces and laboratory test furnace into the model and with the aid of computer, a close approximation to the practice was obtained.

从鞍钢九号高炉和首钢二号高炉风口前回旋区取出了经过部分燃烧的煤粉试样进行研究。结果表明:煤粉离开喷枪刚进入直吹管就开始了挥发份的挥发和燃烧反应;直吹管可能是煤粉预热和预燃烧的一个重要空间。但是煤粉在风口前回旋区仍不能完全燃烧尽,其半焦仍有20—30%是在回旋区外滴落带中焦炭层内气化的,但不影响高炉正常操作。为了进一步扩大喷煤量、节约冶金焦,必须增加能加快风口前煤粉燃烧速度的措施。试验室模拟高炉风口前燃烧条件的燃烧动力学试验表明:对于两厂所用的无烟煤,进一步磨细到小于目前60—80%为-200mesh的水平(亦不宜小于40μm左右),以及增加鼓风含氧到30—40%,进一步提高风温,改进煤粉在直吹管内的分布,在全部风口中同时均匀喷煤,选用烟煤代替目前的无烟煤是有效的。对喷吹前和部分燃烧后的煤粉试样进行煤岩相鉴定表明:烟煤燃烧不仅在表面而且在其内部同时剧烈进行,无烟煤粒的内部燃烧所占比重较表面燃烧要小,特别是首钢京西无烟煤。这和烟煤具有较好的燃烧性一致。根据传热和传质原理推导出一组煤粉燃烧的数字模型,将本文中两座高炉和试验室燃烧炉条件代入数字模型用计算机求解得到与实际近似的结果。

 
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