stagnation temperature

简明释义

滞止温度

英英释义

例句

1.The stagnation temperature is crucial for determining the efficiency of a jet engine during flight.

在飞行过程中，停滞温度对确定喷气发动机的效率至关重要。

2.In high-speed flows, the stagnation temperature can be significantly higher than the static temperature due to kinetic energy conversion.

在高速流动中，停滞温度可能会由于动能转化而显著高于静态温度。

3.Measurements of stagnation temperature can help engineers optimize the design of hypersonic vehicles.

对停滞温度的测量可以帮助工程师优化超音速飞行器的设计。

4.Engine designers must consider the stagnation temperature when calculating the thermal limits of materials used in combustion chambers.

发动机设计师在计算燃烧室中使用材料的热极限时，必须考虑停滞温度。

5.The aircraft's performance is often evaluated based on its stagnation temperature, which is the temperature of the air when it is brought to rest isentropically.

飞机的性能通常基于其停滞温度进行评估，即空气在绝热条件下被静止时的温度。

作文

Understanding the concept of stagnation temperature is crucial in various fields of engineering, particularly in aerodynamics and thermodynamics. The term refers to the temperature a fluid would reach if it were brought to rest isentropically, meaning without any heat transfer or friction losses. This concept is essential for analyzing the performance of aircraft engines, nozzles, and other fluid systems where high-speed flows are involved.When an object moves through a fluid, such as air, it experiences a dynamic pressure due to its velocity. As the fluid slows down, its kinetic energy is converted into thermal energy, resulting in a rise in temperature. The stagnation temperature can be calculated using the equation:T0 = T + (V^2)/(2 * cp)where T0 is the stagnation temperature, T is the static temperature of the fluid, V is the fluid velocity, and cp is the specific heat at constant pressure. This equation illustrates how the stagnation temperature is influenced by both the static temperature and the speed of the fluid. In practical applications, understanding stagnation temperature helps engineers design more efficient systems. For instance, in jet propulsion, knowing the stagnation temperature allows engineers to predict the performance of the engine under different operating conditions. High stagnation temperature indicates that the engine can produce more thrust, which is critical for achieving higher speeds and altitudes.Moreover, the stagnation temperature plays a significant role in the analysis of shock waves and compressible flow. When an aircraft approaches the speed of sound, shock waves form, causing abrupt changes in pressure, temperature, and density. Engineers must account for the stagnation temperature in their calculations to ensure the structural integrity of the aircraft and optimize its aerodynamic performance.In addition to its applications in aerospace engineering, the concept of stagnation temperature is also relevant in other industries, such as automotive and HVAC (heating, ventilation, and air conditioning). For example, in automotive design, engineers consider the stagnation temperature when analyzing the airflow around vehicles to improve fuel efficiency and reduce drag.In conclusion, the stagnation temperature is a fundamental concept that bridges the gap between fluid dynamics and thermal analysis. Its significance extends beyond theoretical calculations, impacting real-world applications across multiple engineering disciplines. By mastering the principles surrounding stagnation temperature, engineers can enhance their designs, leading to improved performance and efficiency in various technologies. Understanding this concept not only aids in the development of advanced systems but also contributes to the ongoing quest for innovation in engineering practices.

理解停滞温度的概念在多个工程领域中至关重要，特别是在空气动力学和热力学中。这个术语指的是如果流体以绝热方式（即没有热传递或摩擦损失）被静止下来时所达到的温度。这个概念对于分析飞机发动机、喷嘴以及其他涉及高速流动的流体系统的性能至关重要。当物体通过流体（如空气）移动时，由于其速度，它会经历动态压力。随着流体减速，其动能转化为热能，导致温度升高。停滞温度可以通过以下公式计算：T0 = T + (V^2)/(2 * cp)其中，T0是停滞温度，T是流体的静态温度，V是流体的速度，cp是定压下的比热。这一方程说明了停滞温度如何受到静态温度和流体速度的影响。在实际应用中，理解停滞温度帮助工程师设计更高效的系统。例如，在喷气推进中，了解停滞温度使工程师能够预测发动机在不同工作条件下的性能。高停滞温度表明发动机能够产生更多的推力，这对于实现更高的速度和高度至关重要。此外，停滞温度在冲击波和可压缩流动分析中也发挥着重要作用。当飞机接近音速时，会形成冲击波，导致压力、温度和密度的急剧变化。工程师必须在计算中考虑停滞温度，以确保飞机的结构完整性并优化其空气动力性能。除了在航空航天工程中的应用外，停滞温度的概念在汽车和HVAC（供暖、通风和空调）等其他行业也相关。例如，在汽车设计中，工程师在分析车辆周围的气流时考虑停滞温度，以提高燃油效率并减少阻力。总之，停滞温度是一个基本概念，它将流体动力学与热分析联系在一起。它的重要性不仅限于理论计算，还影响着多个工程学科中的现实应用。通过掌握与停滞温度相关的原理，工程师可以增强他们的设计，从而提高各种技术的性能和效率。理解这一概念不仅有助于先进系统的发展，还有助于推动工程实践中的创新进程。