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ablative mechanism
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  烧蚀机理
     With the help of analyzing C/C composites thermochemical ablative mechanism, numerical simulation characterize dynamic behavior of material mechanical under high temperature and ablation.
     通过C/C复合材料热化学烧蚀机理分析,模拟高温烧蚀条件下的动态热力学行为;
短句来源
     According to the analysis of the thermal chemical ablative mechanism of resin matrix materials under pyrolytic reaction at elevated temperature, the ablation phase transformation properties and the thermal deformation behavior of the materials were investigated by Eshelby equivalent inclusion method.
     通过对树脂基材料高温热解反应过程中热化学烧蚀机理的分析 ,利用细观力学的 Eshelby等效夹杂方法研究了材料高温烧蚀相变特性和热变形行为。
短句来源
     According to the analysis of the volume ablative mechanism of thermal protective materials under elevated temperatures, the ablation phase transformation properties and the thermomechanical behavior of the materials are investigated by Eshelby equivalent inclusion method.
     通过高温环境下防热材料体积烧蚀机理的分析 ,利用细观力学的 Eshelby等效夹杂方法研究了材料烧蚀-相变特性和热力学性能变化规律。
短句来源
     The ablative mechanism of boron phenolic resin/NBR ablative material system was discussed,and the effects of boron phenolic resin content on ablative,mechanical and processing properties of the ablative materials were investigated in detail.
     探讨了硼酚醛树脂/丁腈胶烧蚀材料体系的烧蚀机理,并详细研究了硼酚醛树脂含量对烧蚀材料烧蚀性能、力学性能和加工性能的影响。
短句来源
     In this paper, according to the analysis of the ablative mechanism of thermal protective materials under elevated temperature, the ablation-phase transformation properties and the thermomechanical behavior of the component materials are investigated by Eshelby equivalent inclusion method.
     通过对高温环境下防热材料内部热化学烧蚀机理的分析,利用Eshelby等效夹杂方法研究了组元材料烧蚀-相变特性和高温力学性能的变化规律。
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  “ablative mechanism”译为未确定词的双语例句
     The influences of resin content,filament diameter and lay on both flexural properties and ablative properties of CBF/S-157 composite were studied. Moreover,micro-appearances of CBF/S-157 composite ablated were observed and the ablative mechanism was simply analyzed in virtue of scanning electron microscopy(SEM).
     考察了树脂含量、纤维单丝直径、纤维股数对CBF/S-157复合材料弯曲性能和烧蚀性能的影响,并借助扫描电镜对其烧蚀表面形貌进行了观察,同时将CBF/S-157复合材料与高硅氧玻璃纤维(简称HSGF)/S-157酚醛树脂复合材料的弯曲性能和烧蚀性能进行了对比。
短句来源
  相似匹配句对
     ABLATIVE CONTROL MECHANISM IN SOLID ROCKET NOZZLE
     固体火箭喷管中的烧蚀控制机制
短句来源
     compete for mechanism;
     以竞争为机制 ;
短句来源
     Its mechanism is discussed.
     探讨了PMAM的阻垢缓蚀机理。
短句来源
     Study on Curing Mechanism of New Inorganic Ablative-Resistant Composites
     一种新型无机耐烧蚀复合材料固化机理的研究
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  ablative mechanism
A narrow zone of vacuolization and coagulative thermal damage lined the crater margins suggesting a predominantly photothermal ablative mechanism.
      


This paper is gone into details on the ablative mechanism and in-depth thermal response for carbon-phenolic composite. The oxida-tion and sublimation of carbon fibers and carbon-nitrogen reaction were discussed. The main effect of pyrolysis gas on surface behavior which increased heat blockage of boundary layer and varied the concentration of gas species are presented. The pyrolysis gas through the carbon layer can decrease enthalpy of carbon and temperature of carbon layer. A method was developed for...

This paper is gone into details on the ablative mechanism and in-depth thermal response for carbon-phenolic composite. The oxida-tion and sublimation of carbon fibers and carbon-nitrogen reaction were discussed. The main effect of pyrolysis gas on surface behavior which increased heat blockage of boundary layer and varied the concentration of gas species are presented. The pyrolysis gas through the carbon layer can decrease enthalpy of carbon and temperature of carbon layer. A method was developed for predicting ablative performance and in-depth thermal response of carbon-phenolic composites . Analytical results were quite consistent with results of ARC-Jet test under steady heating and transient heating simulating ballistic re-entry.

本文分析了碳-酚醛的烧蚀机理和内部热响应特性,讨论了碳纤维的氧化、升华和碳-氮反应。指出热解气体注入边界层的作用主要是增加热阻塞效应和改变壁面组元浓度。热解气体流过材料碳层,起着降低碳层内部温度的作用。基于烧蚀机理和热响应特性的分析,给出了碳-酚醛烧蚀和内部热响应的理论计算方法,计算结果分别与固定状态和模拟再入轨道的变状态的电弧加热器的烧蚀和内部温度的试验结果作了比较,两者符合甚好。

Some essential problems with ablation and heat-conduction calculations in integral complex-structure nozzle of solid rocket are discussed in the paper: ( 1 ) Calculations of two-phase viscous transonic flow and heat-transfer between gas and wall in nozzle are foundation for ablation and heat-conduction calculations. ( 2 ) The aerodynamic thermochemi-cal ablative models must be presented for various compound materials, (3) Particles' erosion must be considered (two-phase ablative mechanism). (4 ) It is...

Some essential problems with ablation and heat-conduction calculations in integral complex-structure nozzle of solid rocket are discussed in the paper: ( 1 ) Calculations of two-phase viscous transonic flow and heat-transfer between gas and wall in nozzle are foundation for ablation and heat-conduction calculations. ( 2 ) The aerodynamic thermochemi-cal ablative models must be presented for various compound materials, (3) Particles' erosion must be considered (two-phase ablative mechanism). (4 ) It is important to study ablative control mechanism. (5) Moving multi-boundaries should be treated in transient heat-conduction. (6) The couple between ablation and heat-conduction should be taked into account. ( 7 ) Careful test and measurement must be conducted. (8 ) Finally, the software of ablation and heat-transfer CAD may be programed.

总结固体火箭复合结构全喷管烧蚀和传热计算中的基本问题:二相跨音速喷管粘流,燃气与喷管壁面的换热,不同材料的热化学烧蚀模型,粒子侵蚀,烧蚀控制机制,移动边界下的瞬时导热,烧蚀与传热的耦合,复合结构全喷管烧蚀和传热的CAD,以及测试等。在解决基本问题的基础上,对复合结构全喷管可获得其烧蚀率和温度分布。

This paper presents a general analysis about the transient response of a charring ablative thermal protection system undergoing ablation,including a detailed treatment of the various thermal,cher-mal,and mass transfer processes in ablation. Three types of thermoche-mical ablative mechanism are presented due to surface temperature.The mathematical equations are presented for the in-depth thermal response problem which is considered as a transient heat and mass transfer pro-cess with a multicomponent flow...

This paper presents a general analysis about the transient response of a charring ablative thermal protection system undergoing ablation,including a detailed treatment of the various thermal,cher-mal,and mass transfer processes in ablation. Three types of thermoche-mical ablative mechanism are presented due to surface temperature.The mathematical equations are presented for the in-depth thermal response problem which is considered as a transient heat and mass transfer pro-cess with a multicomponent flow of pyrolysis-gases undergoing non-e-quilibrium chemical reactions through a variable porous medium which isitself undergoing pyrolytic reactions.The equations are solved numeri-cally by using an exponential finite-difference scheme to obtain solu-tions of a reentrv command module for the thicknesses of the charredlayer and pyrolysis-zone,surface-recession, surface temperature history,profiles of internaI temperature,pressure and solid density,et al.,Aiso, results shown here compare numerical solutions from thisanalysis with solutions from a previous analysis which did not treat thechemical and mass transfer processes as thoroughly as this analysis. This analysis predicts that the surface temperature,surface-recession,gradient of internal temperature are greater than those indicated by theprevious analysis,while the thickness of pyrolysis-Zone, back walltemperature rise are lower,These differences result from considerationof pyrolyss-gases deposition in this analysis.

本文重点对炭化材料烧蚀防热的内部机理,即存在非平衡化学反应的热解气体扩散通过变孔隙度的多孔介质的瞬态传热、传质过程做了深入分析,并利用该方法对飞船返回舱头部的再入烧蚀性能进行了一维计算。通过与简化模型的计算结果比较表明:材料内部质量沉积和化学反应对烧蚀性能有较大影响。

 
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