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isentropic compression
相关语句
  等熵压缩
     Calculation of Metallic Compression Isentropes and Study on Isentropic Compression Experiments by Detonation Driving
     金属等熵压缩线计算及爆轰加载等熵压缩实验研究
短句来源
     Compared with the isentropic compression ramp the length of newly designed curved ramp can be reduced about 25 percent.
     与等熵压缩相比,压缩面的长度可以减少 25%左右;
短句来源
     In addition, a group of ordinary differential equations has been built to determine the thermo-tnechanical state variables in the transition zone of a steady shock wave and the thickness of the high pressure shock wave, and an analytical solution of the equations can be found, provided that the entropy change across the shock is assumed to be negligible and Hugoniot compression modulus is used instead of the isentropic compression modulus.
     另外,本文给出了一个常微分方程组用以计算定态激波过渡带中各状态变量的分布以及激波的厚度. 倘若假定在激波上熵的跳跃可以忽略,并用Hugoniot压缩模量代替等熵压缩摸量,可以获得一个分析解.
短句来源
     Take water and tantalum for examples,the calculation results show this kind of flyers can produce good effects of quasi isentropic compression for water and tantalum,and the result for water is in accord with the reference data,the calculation results for the interface velocity between Ta/LiF is in accord with the experimental results.
     以水和钽为靶的计算结果显示 ,这种多层组合飞片对水和钽均产生了很好的准等熵压缩效果。 其中 ,对水的计算结果与国外文献报道的结果一致 ;
短句来源
     Therefore,the method to obtain quasi isentropic compression by layered flyers impacting target and the method of numerical simulation for quasi isentropic compression are reliable.
     计算的钽 /氟化锂窗口界面速度历史与实验结果十分吻合。 因此 ,用适当匹配的多层组合飞片对靶样品产生准等熵压缩是可行的 ,提出的准等熵压缩的数值模拟方法是可靠的。
短句来源
  “isentropic compression”译为未确定词的双语例句
     Launch technique for isentropic compression flyer plates magnetically driven by using fast pulsed power
     一维平面磁驱动等熵加载发射飞片技术
短句来源
     This paper analyses the compression ratio and the entropy synergist in the process of energy absorption of inertial confinement nuclear fusion. It puts forward the best proportion in the application of sequential pulse beams as wellas the physical conception and designing abstracts in realizing the quasi -isentropic inertial confinement nuclear fusion to bring the adiabutic compression shock wave into the isentropic compression.
     本文分析了惯性约束核聚变能量吸收过程的压缩比和墙增,提出采用最佳配比的相继序列脉冲束,实现激波绝热压缩向等墙压缩逼近的准等熵惯性约束核聚变的物理构思和设计要点.
短句来源
     Describes the method to obtain the yield strength under shock loading and quasi isentropic compression. Take 93 tungsten alloy as an example, its variation of yield strength under shock loading is measured by means of VISAR technique, and the results are compared with the yield strength under quasi isentropic compression.
     描述了冲击加载和准等熵加载下获得材料动态屈服强度的方法 ,并以钨合金材料为研究对象 ,通过VISAR测试技术测量了钨合金材料在冲击加载下的屈服强度随压力的变化 ,并把实验结果与文献报道的准等熵加载下的材料强度变化的实测结果进行了比较 .
短句来源
     It is shown that the yield strength under quasi isentropic compression is greater than that of shock loading, which is mainly caused by the different temperature effects under two dynamic loading conditions.
     结果表明 ,准等熵加载下材料的屈服强度明显高于冲击加载下的材料屈服强度 ,并认为这主要是由于两种加载方式下材料的温升效应不同所造成的
短句来源
     Based on the energy conservation equation and the mass conservation equation, integrating the gas state equation, the isentropic compression equation, and the gas discharging rate equation, the mathematical model is developed for the process. Using the 4-order Runge-Kutta method, the numerical simulation is conducted for the process. The deflagration pressure, pressure-rising rate, flame position, and flame-propagating rate are known at different time.
     从能量守恒方程和质量守恒方程出发,结合气体状态方程、绝热压缩方程和气体泄放速率方程建立了泄爆过程的数学模型,利用四阶龙格—库塔方法对该过程进行了数值模拟,得到了不同时刻燃爆压力、压力上升速率、火焰位置和火焰传播速度。
短句来源
更多       
  相似匹配句对
     STUDY OF NUMERICAL SIMULATION FOR QUASI-ISENTROPIC COMPRESSION
     准等熵压缩的数值模拟研究
短句来源
     We calculated the entropy increasing of quasi-isentropic compression.
     利用自编程序计算了压缩过程的熵增。
短句来源
     mechanical compression;
     机械性压迫损伤组;
短句来源
     Compression Spring
     压缩弹簧的多目标模糊优化设计
短句来源
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  isentropic compression
Isentropic compression of metal powder in impact compaction
      
On the transformation of shock compression into isentropic compression
      
To reach the ultra high pressures that are unattainable in static experiments at temperatures lower than using shock techniques, shockless quasi-isentropic compression is required.
      
It is shown that a twodimensional constant-tension sail in a high-Mach-number stream, will support a nearly centred isentropic compression.
      
A free-piston driver that employs entropy-raising shock processes with diaphragm rupture has been constructed, which promises significant theoretical advantages over isentropic compression.
      
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In this paper, a physical model of the structure and attenuation of shock waves in metals is presented. In order to establish the constitutive equations of materials under high velocity deformation and to study the structure of transition zone of shock wave, two independent approaches are involved. Firstly, the specific internal energy is decomposed into the elastic compression energy and elastic deformation energy, and the latter is represented by an expansion to third-order terms in elastic strain and entropy,...

In this paper, a physical model of the structure and attenuation of shock waves in metals is presented. In order to establish the constitutive equations of materials under high velocity deformation and to study the structure of transition zone of shock wave, two independent approaches are involved. Firstly, the specific internal energy is decomposed into the elastic compression energy and elastic deformation energy, and the latter is represented by an expansion to third-order terms in elastic strain and entropy, including the coupling effect of heat and mechanical energy.Secondly, a plastic relaxation function describing the behaviour of plastic flow under high temperature and high pressure is suggested from the viewpoint of dislocation dynamics. In addition, a group of ordinary differential equations has been built to determine the thermo-tnechanical state variables in the transition zone of a steady shock wave and the thickness of the high pressure shock wave, and an analytical solution of the equations can be found, provided that the entropy change across the shock is assumed to be negligible and Hugoniot compression modulus is used instead of the isentropic compression modulus. A quite approximate method for solving the attenuation of shock wave front has been proposed for the flat-plate symmetric impact problem.

本文给出了研究金属中激波构造与衰减的一个物理模型.为了建立高速形变下材料的本构方程和研究激波过渡带的构造,需要考虑二个独立的理论方面.首先,将比内能分解成弹性压缩能和弹性形变能,而将形变能作为弹性应变和熵的函数展开到三阶项,其中考虑了热与机械能的耦合效应.其次,从位错动力学角度建议了一个塑性松弛函数以便描述高温、高压下塑性流动的特性.另外,本文给出了一个常微分方程组用以计算定态激波过渡带中各状态变量的分布以及激波的厚度.倘若假定在激波上熵的跳跃可以忽略,并用Hugoniot压缩模量代替等熵压缩摸量,可以获得一个分析解.最后,本文还提出了求解平板对称碰撞中激波波头衰减的一个近似方法。

The experiments of quasi-isentropic compression of oxygen free-copper were performed in a two-stage light gas gun by means of the composite flyer, in which the shock impedance increased from the impact surface to the rear interface. The impact velocity was 2.51 km/s. The compression time attained was about 1 us. Using the Lugrangiun analysis technique a quasi-isentropic stress-strain relation of oxygen free-copper was obtained from the laser interferometric measurements of the free surface...

The experiments of quasi-isentropic compression of oxygen free-copper were performed in a two-stage light gas gun by means of the composite flyer, in which the shock impedance increased from the impact surface to the rear interface. The impact velocity was 2.51 km/s. The compression time attained was about 1 us. Using the Lugrangiun analysis technique a quasi-isentropic stress-strain relation of oxygen free-copper was obtained from the laser interferometric measurements of the free surface velocity histories on the different thickness specimens. The preliminary results show that quasi-isentrope is located above the Hugoniot at stress lower than 32GPa. which is contrary to the expectation, and falls back below the Hugoniot at the stress higher than 32GPa. The phenomenon, which was similar to the results of aluminum and tungsten reported by Barker and Chhabildas et al.. was attributed to the furth increasing of dynamic strength of the specimen with the lower strain rate, arising from the quasi-isentropic compressing process, at low stresses, comparing with the shock-loading condition.

利用递变冲击阻抗材料叠合而成的组合飞片,在二级轻气炮上对无氧铜进行了准等熵压缩性测量,加载时间约达1μs。用激光速度干涉仪连续记录了不同厚度处无氧铜样品自由面速度随时间的变化过程,并通过拉格朗日波分析技术计算得到 40 GPa下的准等熵的应力-应变曲线。结果表明:在低应力区,无氧铜的准等熵压缩线位于冲击绝热线之上;到 32 GPa以上,准等熵压缩线才回落到冲击绝热线之下。这个现象与Barker、Chhabildas 等对铝与钨的实测现象是一致的,它表明:在低应力区,材料的冲击强化效应与加载速率密切相关。

This paper analyses the compression ratio and the entropy synergist in the process of energy absorption of inertial confinement nuclear fusion. It puts forward the best proportion in the application of sequential pulse beams as wellas the physical conception and designing abstracts in realizing the quasi -isentropic inertial confinement nuclear fusion to bring the adiabutic compression shock wave into the isentropic compression.

本文分析了惯性约束核聚变能量吸收过程的压缩比和墙增,提出采用最佳配比的相继序列脉冲束,实现激波绝热压缩向等墙压缩逼近的准等熵惯性约束核聚变的物理构思和设计要点.

 
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