瞬变流动是供热管网中普遍存在的流动状态。
Transient is the widespread and existent fluxion appearance in the heating networks.
本文对开井后单相气体瞬变流动的规律进行研究。
This paper studies the transient flow rule of single phase gas after the well is opened.
根据气体瞬变流动过程中所遵循的质量、动量和能量守恒定律建立描述气体瞬变流动的数学模型。
It constructs a mathematic model to describe gas transient flow according to the mass, momentum and energy conservation law.
在实际运行中，湿天然气在输送管道中存在气液两相，因此管道中的流动总是处于慢瞬变流动状态。
The wet natural gas in transmission pipeline assumes two phase of gas and liquid, so its flowing always assumes a slow transient flow state.
通过数值模拟方法分析供热管网的瞬变流动工况，对研究供热管网的具体水锤防护措施有参考价值和指导意义。
Through the numerical simulation to transient analysis in heating networks, it is consult value and guide significance for the water hammer protection measure.
基于这一思想，给出了管道泄露检测的数学模型，即体积流量平衡模型、热力平衡模型、瞬变流动模型及其求解方法。
Based on that, the numerical of product leakage and its method of solving are proposed, which include volume balance calculations, heat transfer models and transients fluid flow models.
文章详细讨论了原油管道瞬变流动的数学描述及有限差分求解方法，并分别分析了对简单管道和长输管道不稳定工况的仿真。
Discussed are the hydraulic transient equations of fluid transient in pipelines and the finite differential solution as well as the practical simulation of short or long pipelines.
反应堆瞬变，主管道的破裂，蒸汽线的断裂，流动的损失，等等。
Reactor transients, rupture of the primary piping, steam line breaks, loss of flows and so forth.
本文分析研究了液压系统中液流在连接不同直径管道的装置处，流动参数发生瞬变的物理特征。
This paper deals with the physical characteristics of the transient of flow parameters in hydraulic system when fluid flows through pipe junction with different diameter.
管道动力系统中非定常流动工况是不可避免的，并且在一定条件下，具有强瞬变特性。
The operating mode of the unsteady flow in the dynamic system of the pipeline is inevitable, and has the character of the strong transitory in certain cases.
管道动力系统中非定常流动工况是不可避免的，并且在一定条件下，具有强瞬变特性。
The operating mode of the unsteady flow in the dynamic system of the pipeline is inevitable, and has the character of the strong transitory in certain cases.
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