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空气当量比
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  equivalence ratio
     The stable burning can be observed when the premixed gas velocity changed from 0.57m/s to 18.4m/s in suitable hydrogen-air equivalence ratio.
     在适当的氢气/空气当量比下,混合气流速从0.57m/s到18.4m/s部可以在管道中维持长时间稳定燃烧。
短句来源
     The temperature distributions inside the porous medium combustor were measured at various working parameters (fuel-air equivalence ratio, gas flow velocity and half cycle period).
     对各种工况参数(燃料空气当量比、气体流速、循环半周期)下多孔介质内轴向温度分布进行了系统的测量.
短句来源
     The effects of reactor temperature(600℃~850℃),equivalence ratio(0.15~0.35)and inner circulation on gas composition,gas yield,lower heat value(LHW)of fuel gas and gasification efficiency were investigated.
     考察了一些主要参变量,如温度(600~850℃)、空气当量比(0.17~0.35)和内循环率等对气化结果的影响。
短句来源
     The results of biomass air gasification in a fluidized-bed reactor are influenced by many factors,among which the reaction temperature and equivalence ratio have greater effects on the quality of producer gas.
     流化床反应器中生物质空气气化结果受诸多因素影响,其中反应温度、空气当量比对产气质量影响较大.
短句来源
     The test results show Low Heat Value(LHV) and quality of the producer gas at 720℃ of reaction temperature are higher than that at other temperatures and the LHV ranges from 5 to 8.6 MJ /Nm~3.With the increasing of the equivalence ratio and reaction temperature,the LHV and quality of the producer gas decrease.
     实验结果表明,在720℃时气化产气热值较高,气体质量较好,气化气热值在5~8.6 MJ/Nm3之间. 随着空气当量比增加,气化气热值降低;
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  “空气当量比”译为未确定词的双语例句
     The main frequencies of pressure oscillation decrease with the increase of the equivalent rates, and with the increase of the mean pressures of a combustor. The relationship between oscillation frequency and premixed gas flux is complex.
     研究表明:燃烧不稳定性与燃料/空气当量比有很大的关系,压力振动的特征频率随着燃料/空气当量比的增大而减小,压力振动的频率随着燃烧室平均压力的增大而减小、与预混气流量的关系比较复杂。
短句来源
     According to the burning technic and mechanism, the burner & calciner operation points were as follows, for the former: (1) ensuring a higher valent weigh ratio of fuel to air;
     根据抑制NOx生成的燃烧技术和机理,得出燃烧器操作要点为:(1)保证较高的燃料空气当量比;
短句来源
  相似匹配句对
     Control formula include s influence of carbon equivalent burn-out ratio to air supply.
     控制公式同时包含了当量碳燃烬空气供给的影响。
短句来源
     Application of Land Equivalent Ratio (LER) on Sequential Cropping
     土地当量和复种指数的应用研究
短句来源
     Stoichiometric ratio of fuel-air mixture is 0.4. Constant wall temperature has adopted as a boundary condition.
     燃料-空气混合物的当量为0.4,反应器壁面采用等温边界条件。
短句来源
     THERMODYNAIC ANALYSIS ABOUT MEASURE OF RATIO OF SPECIFIC HEAT OF AIR
     空气热容测定的热力学分析
短句来源
     A Nomogram for Determining Specific Exergy of Moist Air
     确定湿空气的线算图
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  equivalence ratio
Ignition delay time behind a reflected shock wave is measured for a lean propane-air mixture with an equivalence ratio of ? = 0.5 in wide temperature and pressure ranges (T = 880-1500 K, P = 2-500 atm).
      
Both experiment and numerical simulation were made at inlet temperature of 553 K, inlet velocity of 3 to 7 m/s and equivalence ratio of 0.3 to 0.5.
      
The combustion timing advances with the increase of DTBP concentrations, coolant temperature and equivalence ratio.
      
The chemical form of the nitrogen affixed to the PP surface is strongly dependent on the flame equivalence ratio.
      
With both models, the dependence of the results on the stoichiometric coefficient and the equivalence ratio can be expressed in an explicit manner.
      
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  air equivalence ratio
Prescribed parameters are the upstream values for the pressure, temperature, and Mach number, the fuel/air equivalence ratio, a hydrogen/methane ratio, and the detonation wave angle.
      
The temperature fields obtained from the two-line technique are used to correct the original tracer-LIF images in order to evaluate quantitative fuel distributions in terms of number densities and fuel/air equivalence ratio.
      
Global statistical analysis reveals that the fuel-to-air equivalence ratio significantly affects the turbulence structure of the reactant flow.
      
The flame of a premixed mixture iso‐C5H12 + O2 + Ar with a fuel‐to‐air equivalence ratio of 1.7 is examined.
      
It is shown that the dependences of the combustion wave velocity on the fuel-air equivalence ratio are V-shaped.
      
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A simple but accurate model for the combustion efficiency (η_c) of 4-stroke homogeneous charge spark ignition engines has been developed basedupon thermochemical equilibrium arguments.This model assumes that η_c isa function of only the fuel-air equivalence ratio (φ) for hydrocarbon fuelswith a hydrogen-to-carbon ratio similar to that of iso-octane: η_c=0.959+0.129φ-0.121φ2 0.5≤0≤1.0 η_c=2.594-2.173φ+0.546φ~2 1.0≤0≤1.5This model was shown to accurately predict experimental data for ranges ofcompression ratio,load,ignition...

A simple but accurate model for the combustion efficiency (η_c) of 4-stroke homogeneous charge spark ignition engines has been developed basedupon thermochemical equilibrium arguments.This model assumes that η_c isa function of only the fuel-air equivalence ratio (φ) for hydrocarbon fuelswith a hydrogen-to-carbon ratio similar to that of iso-octane: η_c=0.959+0.129φ-0.121φ2 0.5≤0≤1.0 η_c=2.594-2.173φ+0.546φ~2 1.0≤0≤1.5This model was shown to accurately predict experimental data for ranges ofcompression ratio,load,ignition timing,and speed typical of normal enginedesign and operation.The model slightly overpredicts the data for higherthan typical engine speeds and is not applicable to engines operating nearthe partial burn,ignition,or lean misfire limits.An example of the poten-tial usefulness of this model is also briefly discussed.

本文根据热化学平衡理论,对于均质充量四冲程火花点火发动机建立了一个燃烧效率η。的简单而精确的模型。模型假设对于氢碳比与异辛烷类似的碳氢燃料,η_o仅是燃料空气当量比φ的函数,公式为: η_o=0.959+0.129φ-0.121φ~2 0.5≤φ≤1.0 η_o=2.594-2.173φ+0.546φ~2 1.0≤φ≤1.5 这一模型在能代表一般类型发动机及运行状态的压缩比、负荷、点火正时和转速范围内,可对实验值作出精确预测;在发动机转速高于典型转速时,本模型的预测值有些偏高;而在不完全燃烧、点火或贫油极限附近的运行状态下则不适用。本文还简单地讨论了这一模型的可能用途。

This paper reports a preliminary study in criterion and mechanism of flame stability using opposed jet. The experimental investigation was made for cold flow field and blowoff of a stabilized flame by means of premixed lean liquefied petrolium gas. The criterion of flame stabilization has been obtained. It can be presented as: which correlated with main stream velocity, opposed jet velocity and inner diameter of jet tube. The range of critical zone is determined preliminarily by blowoff phenomenon using nitrogen...

This paper reports a preliminary study in criterion and mechanism of flame stability using opposed jet. The experimental investigation was made for cold flow field and blowoff of a stabilized flame by means of premixed lean liquefied petrolium gas. The criterion of flame stabilization has been obtained. It can be presented as: which correlated with main stream velocity, opposed jet velocity and inner diameter of jet tube. The range of critical zone is determined preliminarily by blowoff phenomenon using nitrogen as a blowing medium. A mechanism of flame stabilization proposed roughly in this paper. In the mechanism, critical zone is considerd as a well-stirred reactor and it acts as a strong ignition source to keep the flame stabilization.

本文初步揭示了逆向射流的火焰稳定机理及火焰稳定准则。首先,通过实验测量,得到了冷态流场结构及预混可燃气在贫燃料侧的吹熄极限,并通过对这些数据的归纳整理,得出了火焰稳定准则关系式:在这一式中,包括了主流流速,逆向射流流速,燃料空气当量比和逆向射流喷口内径等多个参数。其次,通过氮气侧吹熄火实验了解到,流场中的不同位置对火焰稳定有着不同的影响,并初步确定临界区位于逆向射流喷口前端的火焰头部。通过对以上实验现象的分析,确定了逆向射流的火焰稳定机理,这一机理认为:临界区相当一个均匀搅拌反应器,它提供了火焰稳定所必须的点火能量。

The characteristics of biomass airsteam gasification in a fluidized bed were analyzed in this paper through a series of experiments The effects of reactor temperature (700?℃~900?℃), steam to biomass ratio (0~404), equivalence ratio (019~027) and biomass particle size (02?mm~09?mm) on gas composition, gas yield, steam decomposition, lower heat value (LHV) of fuel gas were investigated Under the experimental conditions examined, the fuel gas yield ranges between 143N?m3/kg and 257N?m3/kg biomass and...

The characteristics of biomass airsteam gasification in a fluidized bed were analyzed in this paper through a series of experiments The effects of reactor temperature (700?℃~900?℃), steam to biomass ratio (0~404), equivalence ratio (019~027) and biomass particle size (02?mm~09?mm) on gas composition, gas yield, steam decomposition, lower heat value (LHV) of fuel gas were investigated Under the experimental conditions examined, the fuel gas yield ranges between 143N?m3/kg and 257N?m3/kg biomass and the LHV of fuel gas ranges between 6741?kJ/m3 and 9143?kJ/m3 The results show that higher temperature contributes to more hydrogen production, but lower LHV Compared with biomass air gasification, the introduction of steam improves gas quality But excessive steam will lower gasification temperature and degrade fuel gas quality The biomass particle size also has influence on gas composition and gas yield The smaller particle yields more CH4 and CO, but less CO2

以流化床为反应器,对生物质的空气 水蒸气气化特性进行了研究。考察了一些主要参变量,如温度(700℃~900℃)、水蒸气/生物质比(0~4 04)、空气当量比(0 19~0 27)以及生物质粒度(0 2mm~0 9mm)等对气化结果的影响。在实验研究的条件范围内,生物质产气率在1 43m3/kg~2 57m3/kg范围内变化,产气的低热值在6741kJ/m3~9143kJ/m3范围内变化。实验结果表明:较高的气化温度有利于氢的产生;但气化温度过高会使气体热值下降;与常规的空气气化相比,水蒸气的加入使生物质气化产气率显著提高,但水蒸气加入量过多使气化温度下降,产气率和产气热值降低;生物质颗粒粒度的大小对产气组分的分布和产气率均有影响,较小颗粒的生物质会产生较多的CH4、CO和较少的CO2。

 
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