共查询到20条相似文献,搜索用时 203 毫秒
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将Beattie-Bridgeman(BB)方程和其改进形式Benedict-Webb-Rubin(BWR)方程应用于低温高密度的N2气体,通过计算值与实验值的比较发现:在N2气体温度低至150 K、压强达100 MPa和密度达临界密度ρc的2.548倍时,BWR方程仍能计算出可靠的结果,对低于临界温度的过冷气体也能给出较高准确度的计算结果,这说明该方程对低温高密度的N2气体能准确描述。而BB方程却不适用于低温高密度的情况。 相似文献
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本文采用文献[1]所给出的关于甲烷分子的单中心球对称类氖波函数,从理论上计算了CH_4—CH_4分子间的排斥势函数和高温高密度条件下CH_4气体的二级维里系数。 相似文献
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补充送气(GP)一方面是高密度放电的一种加料方式,另一方面也为等离子体产生提供初始气体。HL-2A装置放电依靠欧姆变压器击穿,尚无其他加速放电的预电离措施。 相似文献
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高温高密度条件下CH4气体分子间的排斥势函数与二级维里系数的… 总被引:1,自引:0,他引:1
张中明 《原子与分子物理学报》1993,10(4):2960-2966
本文采用文献(1)所给出的关于甲烷分子的单中心对称类氖波函数,从理上计算了CH4-CH4分子间的排斥函数和高温度高密度条件下CH4气体的二级维里系数。 相似文献
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1前言将六氟化硫以音速喷射到储有液态金属拥的反应器中就能产生出非常高密度的能量,它将是潜艇推进动力中的一个新动力源山。文献*选择氯化氢与氨水溶液来模拟六氟化硫与液态金属理的反应,从而避免后者在实验时快速释放高密度能量而引起测量的困难。他们发现由于氨会与氯化氢产生放热反应,会使氯化氢射流在喷口处发生不稳定流动。虽然文献问、山曾用Kelvin-Helmholtz不稳定性理论分析了液体中音速气体射流的特性,但它们只是讨论没有化学反应的情况。文献间开始讨论有化学反应的液体中音速气体射流的不稳定特性,把气一液分界面上质… 相似文献
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高密度氢气的分子间相互作用与状态方程 总被引:3,自引:2,他引:1
本文从高密度氢气的分子间相互作用出发进行分析,在修改范德瓦耳方程的基础上,提出了一种新的适用于高密度氢气的状态方程,并用来系统地计算了氢气在临界区的等温压缩线.在缺乏实验数据的情况下,这些理论计算结果很有用. 相似文献
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通过对分子动力学模拟公式和同位素相互作用势特点的分析,提出用一个统一的状态方程描述同位素气体的P-V-T特性.进而选用Benedict-Webb-Rubin方程作为统一的状态方程,利用H2气体的135组实验值确定其八个参数.这个方程的计算结果与H2和D2气体的实验值符合良好.T2气体目前尚未见到成套的P-V-T实验数据报道,不能直接与实验结果对比,但与T2气体的分子动力学模拟计算结果一致. 相似文献
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高温高压气体的状态方程与热力学性质 总被引:3,自引:2,他引:1
本文根据高温高压下气体分子要压缩的观点出发,提出了一个简单实用的高温高压气体状态方程,并用以研究和计算气体在高温高压下的热力学函数与性质. 相似文献
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David A. Young 《高压研究》2013,33(5-6):389-400
Abstract Simple statistical mechanics models have been assembled into a wide-range equation of state for the hydrogen isotopes. The solid is represented by an Einstein-Grüneisen model delimited by a Lindemann melting curve. The fluid is represented by an ideal gas plus a soft-sphere fluid configurational term. Dissociation and ionization are approximated by modifying the ideal gas chemical-equilibrium formulation. The T = 0 isotherm and dissociation models have been fitted to a new diamond-anvil isotherm and to laser-generated shock data. The main limitation of the model is in ionization at high compression. 相似文献
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范德瓦耳斯方程能够较好地描述实际气体的热力学过程,方程中的参数b是因实际气体分子的体积而引入的修正量.本文通过考察分子之间的相互碰撞事件,计算得到了范德瓦耳斯气体体积的修正值,约等于1 mol气体所有分子体积总和的4倍,结果与其他方法得到的结果一致.这是一种新的计算思路和方法. 相似文献
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Ritsu Dobashi Satoshi Kawamura Kazunori Kuwana Yoshio Nakayama 《Proceedings of the Combustion Institute》2011,33(2):2295-2301
Recently, consequence analyses of accidental gas explosions are often carried out to assess the risk of chemical plants, hazardous-materials sites and new energy systems. In these consequence analyses, it is indispensable to adequately predict the blast-wave (pressure-wave) intensity from gas deflagrations. Some prediction models already exist; however, most of them are based on the theory for explosives and adjusting parameters are needed for evaluating gas deflagrations. In this study, new prediction methods for gas deflagrations were developed. From theoretical analysis of blast-wave generation by a gas deflagration, an evaluation equation of the blast-wave intensity was derived. As the scale of gas deflagration becomes larger, flame front instability (especially hydrodynamic instability) would be more effective and the flame propagating velocity starts to be accelerated. Therefore, the equation was modified considering the effect of flame instability. The evaluations by this modified equation agreed well with the results of large scale experiments. By this analysis, it was found that not only total energy release but also combustion reaction rate has to be introduced into the prediction of gas deflagrations. Using this concept, a modified scale model to predict the blast-wave intensity was developed by improving the previous scale model introducing the term of combustion reaction rate as burning velocity. Furthermore, scale analysis was performed to develop the new scaling law. The universal relationship between scaled distance and overpressure has been realized by this new scaling law for gas deflagrations. In summary, these results provide new methods for accurate prediction of the blast-wave intensity from gas deflagrations. 相似文献
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Motivated by some recent results concerning the model of a noninteracting one-dimensional lattice gas with an order preservation of particles where multiple occupancy of the sites is not excluded, we give new symmetries and new reductions of the corresponding continuum nonlinear partial differential equation. Closed-form analytic solutions are found. 相似文献
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地层油气的相平衡热力学研究王利生(北京理工大学化工学院北京100081)关键词混合规则,状态方程,油藏流体,相平衡1链状分子的普遍化范德华配分函数链状分子的转动和振动运动会受阻于其它分子的运动,因而其配分函数中的转动和振动贡献与温度、密度均有关,被分... 相似文献