High velocirt flows of dense gases

稠密气体的高速流动

基本信息

  • 批准号:
    05805081
  • 负责人:
  • 金额:
    $ 1.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1993
  • 资助国家:
    日本
  • 起止时间:
    1993 至 1994
  • 项目状态:
    已结题

项目摘要

1.The shock transition in the van der Waals gas has been studied analytically and numerically. It was proved that two shock adiabatics in the pV-plane can intersect at four points. This never occurs in the perfect gas. In special cases, a single shock was equivalently effected by two successive shock transitions. The supersonic-supersonic shock waves were stably simulated at least numerically.2.A shock tube for n-pentan was constructed and the basic experiments were performed to check the validity and the security of the equipment.3.A relected shock tunnel was designsd and constructed. Freejets of n-pentan were realized in the shock tunnel and the liquifaction shock and the shock splitting were observed by optical method (Shlieren photographs) .4.From the theoretical analysis, it was proved that the gas stste with a negative fundamental derivative GAMMA is very difficult to be realized by the shock compression for n-pentan. This is because n-pentan has very large specific heat and then cannot effectively be heated by the shock compression. This suggests that the shock tube for very high temperature gas (300-400 K) is necessary to realize the gas state with negative GAMMA. Modification and improvement of the present equipment are needed for the future experimental study.
1.本文用解析和数值方法研究了货车德瓦耳斯气体中的激波转捩。证明了pV平面上的两条激波线可以相交于四点。这在理想气体中永远不会发生。在特殊情况下,一个单一的冲击相当于两个连续的冲击过渡的影响。2.建立了正戊烷激波管,并进行了基础实验,验证了实验装置的有效性和安全性。3.设计并建立了反射激波风洞。在激波风洞中实现了正戊烷的自由射流,并用光学方法(Shlieren照片)观察到了液化激波和激波分裂。4.从理论分析上证明了正戊烷的激波压缩很难实现负基本导数的气体状态。这是因为正戊烷具有非常大的比热,因此不能通过冲击压缩有效地加热。这表明,要实现负伽马气体状态,必须采用高温气体激波管(300-400 K)。为进一步的实验研究,需要对现有的实验设备进行改进和完善。

项目成果

期刊论文数量(56)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Yoshikuni Umeda: "Oscillation modes of underexpanded jets issuing from square and equilateral triangular nozzles." J. Acoust. Soc. America. Vol.95. 1853-1857 (1994)
Yoshikuni Umeda:“从方形和等边三角形喷嘴喷出的欠膨胀射流的振荡模式。”
  • DOI:
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    0
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  • 通讯作者:
Ryuji Ishii: "Bubbly flows through a converging-diverging Nozzle" Physics of Fluids A. Vol.A5. 83-104 (1993)
Ryuji Ishii:“气泡流过收敛-扩散喷嘴”《流体物理》A. Vol.A5。
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    0
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Ryuji Ishii: "Structure of Shock Waves in Bubbly Liquid." Proc. of the 5th ISCFD-Sendai. Vol.II. 347-351 (1993)
石井龙二:“气泡液体中冲击波的结构”。
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    0
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  • 通讯作者:
Norihiko Shishido: "Evapolation and Condensation Waves in a van der Waals Gas. (in Japanese)" Nagare. Vol.13. 389-398 (1994)
Norihiko Shishido:“范德华气体中的蒸发和凝结波。(日语)”Nagare。
  • DOI:
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  • 影响因子:
    0
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  • 通讯作者:
Ryuji Ishii: "Weak Shock Waves in Bubbly Liquid" Proc.2-nd ICMF'95-Kyoto. (to appear).
Ryuji Ishii:“气泡液体中的弱冲击波”Proc.2-nd ICMF95-Kyoto。
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    0
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ISHII Ryuji其他文献

ISHII Ryuji的其他文献

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{{ truncateString('ISHII Ryuji', 18)}}的其他基金

Abnormally large acceleration of bubbles in flows of bubbly liquid
气泡液体流中气泡的加速度异常大
  • 批准号:
    03805007
  • 财政年份:
    1991
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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