unsteady state

简明释义

非稳态

英英释义

例句

1.During the experiment, we observed that the temperature remained in an unsteady state for several minutes.

在实验过程中，我们观察到温度保持在不稳定状态几分钟。

2.In fluid dynamics, an unsteady state can lead to turbulence and chaotic flow patterns.

在流体动力学中，不稳定状态可能导致湍流和混乱的流动模式。

3.The unsteady state of the vehicle made it difficult to control during the sharp turn.

在急转弯时，车辆的不稳定状态使得控制变得困难。

4.Engine performance can be affected by an unsteady state during acceleration.

加速过程中，发动机性能可能受到不稳定状态的影响。

5.The system was operating in an unsteady state, which caused fluctuations in the output.

系统处于不稳定状态，导致输出波动。

作文

In the realm of physics and engineering, the term unsteady state refers to a condition where the properties of a system change with time. This contrasts with a steady state, where the system's properties remain constant over time. Understanding the concept of unsteady state is crucial for engineers and scientists as it plays a significant role in various applications, including fluid dynamics, thermodynamics, and control systems.To illustrate the importance of unsteady state, consider the example of a heating system in a building. When the heating system is turned on, the temperature inside the building does not instantly reach the desired level. Instead, it gradually increases over time. During this period, the system is in an unsteady state as the temperature is changing. Once the desired temperature is achieved and maintained, the system transitions into a steady state where the temperature remains constant.Another example can be found in fluid flow. When water is poured into a container, the water level rises until it reaches a certain height. Initially, the water level is in an unsteady state because it is increasing. However, once the water stops flowing and the level stabilizes, the system reaches a steady state. Engineers must account for these unsteady state conditions when designing systems, such as pipelines or reservoirs, to ensure they can handle fluctuations in flow rates and pressures.The concept of unsteady state also applies to chemical reactions. In many chemical processes, reactants are converted to products over time. Initially, the concentration of reactants decreases while the concentration of products increases, placing the system in an unsteady state. As the reaction progresses and reaches equilibrium, the concentrations stabilize, leading to a steady state. Understanding these dynamics is vital for optimizing reaction conditions in industrial processes.Moreover, in control systems, the response of a system to changes in input can also exhibit unsteady state behavior. For instance, when a control valve is adjusted, there is a transient period during which the output variable, such as pressure or flow rate, changes until it settles at a new steady value. Engineers must design controllers that can effectively handle these unsteady state conditions to maintain system stability and performance.In summary, the concept of unsteady state is fundamental in various fields of science and engineering. It describes the dynamic nature of systems as they transition from one state to another. By understanding and analyzing unsteady state behavior, professionals can design more efficient systems and anticipate potential challenges. Whether in heating systems, fluid dynamics, chemical reactions, or control systems, recognizing the significance of unsteady state conditions is essential for achieving optimal performance and reliability in engineering applications.

在物理和工程领域，术语unsteady state指的是系统属性随时间变化的状态。这与稳态相对立，后者是系统的属性随时间保持不变。理解unsteady state的概念对于工程师和科学家至关重要，因为它在流体动力学、热力学和控制系统等各种应用中发挥着重要作用。为了说明unsteady state的重要性，考虑一个建筑物的加热系统的例子。当加热系统开启时，建筑内部的温度并不会瞬间达到所需水平。相反，它会随着时间的推移逐渐升高。在此期间，系统处于unsteady state状态，因为温度正在变化。一旦达到所需温度并保持稳定，系统就会过渡到稳态，在这个状态下，温度保持不变。另一个例子可以在流体流动中找到。当水被倒入容器时，水位上升直到达到某个高度。最初，水位处于unsteady state状态，因为它在增加。然而，一旦水停止流动且水位稳定，系统就达到了稳态。工程师在设计系统（如管道或水库）时必须考虑这些unsteady state条件，以确保它们能够应对流量和压力的波动。unsteady state的概念也适用于化学反应。在许多化学过程中，反应物随着时间的推移转化为产物。最初，反应物的浓度下降，而产物的浓度上升，使得系统处于unsteady state状态。随着反应的进行并达到平衡，浓度稳定，导致稳态的形成。理解这些动态过程对于优化工业过程中的反应条件至关重要。此外，在控制系统中，系统对输入变化的响应也可能表现出unsteady state行为。例如，当调整控制阀时，输出变量（如压力或流量）会在一个瞬态期间内发生变化，直到其稳定在新的稳态值。工程师必须设计能够有效处理这些unsteady state条件的控制器，以保持系统的稳定性和性能。总之，unsteady state的概念在科学和工程的各个领域都是基础。它描述了系统从一种状态过渡到另一种状态的动态特性。通过理解和分析unsteady state行为，专业人士可以设计更高效的系统并预见潜在挑战。无论是在加热系统、流体动力学、化学反应还是控制系统中，认识到unsteady state条件的重要性对于实现工程应用中的最佳性能和可靠性至关重要。