本文论述了计算所得的非稳态流场的时均值。
The time-average of the unsteady flow-field obtained in the computation is discussed.
接下主要内容介绍了准一维流动，接著讨论扰动流与非稳态流。
The next large block of lectures covers quasi-one-dimensional flow, followed by a discussion of disturbances and unsteady flows.
试验研究了恒定二元水平有压扩散流中的局部非稳态流动现象。
Based on model experiment, the local unsteady phenomenon in 2-d horizontal flow with steady divergent pressure was studied.
采用双时间步和预处理相结合的方法计算非稳态流场，保证了采用预处理方法后计算结果的时间精确性。
Time precision of calculation results of unsteady flow field was ensured by using combined method of dual-time step and preconditioning.
并通过吸收传质流体CFD模型，应用有限元方法对气液吸收过程中出现的自然对流发生过程进行了数值计算，得到了液相自然对流发生时的非稳态流场分布和浓度分布信息。
Unsteady flow and concentration fields in the liquid phase of a gas-liquid contacting system were simulated to show the natural convection by utilizing the finite-element CFD method.
将各种非稳态火源热释放速率计算式嵌入建筑物火灾烟流性状预测软件并进行了算例验证。
Some heat release rate formulas are added to the application software for calculation on the properties of the fire smoke flow in building.
对在均匀流场作用下的二维非稳态晶体生长控制方程进行了分析，证明了原定解问题的解是稳定的。
The stability about the solution of the original problem is proved by analyzing a two-dimensional time-dependent control equation for crystal growth in a uniform convection field.
本文基于一维非稳态多分支非定常流，建立了相应的数学模型，采用有限容积法理论对方程进行数值离散分析。
The thesis established the flow model based on one-dimensional, unsteady, compressible, Navier-Stokes equations, and discrete the governing equations using a finite-volume formulation.
PIV技术可用于瞬时体积流量的测量以及流场非稳态特性的研究。
This confirms that the PIV system can be applied to measure the instantaneous volume flow rate and investigate the unsteady characteristics.
PIV技术可用于瞬时体积流量的测量以及流场非稳态特性的研究。
This confirms that the PIV system can be applied to measure the instantaneous volume flow rate and investigate the unsteady characteristics.
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