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首页> 外文会议>Fluids Engineering Conference Vol.2 Pt.D >FLASHING HAMMER PHENOMENON IN RAPID LIQUID-LIQUID CONTACT
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FLASHING HAMMER PHENOMENON IN RAPID LIQUID-LIQUID CONTACT

机译：快速液-液接触中的闪锤现象

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摘要

In a wall crack accident or loss-of-coolant accident (LOCA) in an advanced reactor with water filled containment, high pressure saturated water is discharged from the pressure vessel into the low-pressure, low-temperature water of the containment. The discharged saturated water causes flashing and generates steam. Steam is then condensed by the water in the containment. This paper describes our study of high pressure saturated water that rapidly contacts low- pressure, low-temperature water. The purpose of the study was to clarify the transient phenomena that occur when high pressure saturated water blows down from a pressure vessel into a water filled containment during a wall crack accident or LOCA in an advanced reactor. The experimental results revealed that flashing of high-pressure saturated water and a subsequent water hammer occurred under the specified experimental settings. Pressure peaked when steam generation or flashing occurred at the wall surface and the flashing steam condensed. After the peak, pressure oscillated and reached equilibrium condition in a short time. The pressure oscillation might have been caused by a balancing action between the flashing of high pressure saturated water and condensation of the steam generated by flashing in low-pressure, low-temperature water. To check the results of the experiments, numerical analyses were conducted. The numerical results cleared the mechanism behind flashing hammer phenomenon.
机译：在装有注满水的安全壳的高级反应堆中发生墙体破裂事故或冷却剂损失事故（LOCA）时，高压饱和水会从压力容器中排放到安全壳的低压低温水中。排出的饱和水会引起闪蒸并产生蒸汽。然后，蒸汽被安全壳中的水冷凝。本文描述了我们对快速接触低压，低温水的高压饱和水的研究。该研究的目的是弄清在高级反应堆中发生壁裂事故或LOCA时，高压饱和水从压力容器向充水的安全壳喷涌时发生的瞬态现象。实验结果表明，在指定的实验设置下，高压饱和水闪蒸，随后发生水锤现象。当蒸汽在壁表面产生或闪蒸并且闪蒸的蒸汽冷凝时，压力达到峰值。峰值之后，压力在短时间内振荡并达到平衡状态。压力振荡可能是由高压饱和水的闪蒸与低压，低温水中的闪蒸产生的蒸汽凝结之间的平衡作用引起的。为了检查实验结果，进行了数值分析。数值结果清除了闪击现象背后的机理。

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