double expansion engine

简明释义

二次膨胀式蒸汽机

英英释义

例句

1.Engineers are studying the double expansion engine for its potential applications in modern ships.

工程师们正在研究双膨胀发动机在现代船舶中的潜在应用。

2.The efficiency of the double expansion engine compared to single expansion engines is remarkable.

与单膨胀发动机相比，双膨胀发动机的效率显著。

3.The double expansion engine operates on the principle of using steam twice to generate more power.

该双膨胀发动机的工作原理是利用蒸汽两次产生更多动力。

4.The ship was powered by a double expansion engine, which greatly improved its efficiency.

这艘船由双膨胀发动机驱动，大大提高了其效率。

5.In the museum, we saw a model of an old double expansion engine that was used in steamships.

在博物馆里，我们看到了一个旧的双膨胀发动机模型，曾用于蒸汽船。

作文

The history of steam engines is a fascinating journey that highlights the evolution of technology and engineering. Among the many innovations in this field, the double expansion engine stands out as a remarkable advancement that significantly improved the efficiency and power output of steam engines. Understanding the mechanics and applications of the double expansion engine can provide valuable insights into the development of modern engineering practices.The double expansion engine operates on the principle of expanding steam in two stages, which allows for more efficient use of the energy produced by the steam. In a traditional single expansion engine, steam is introduced into a cylinder, where it expands and pushes a piston to create motion. However, much of the energy in the steam is wasted as it exits the cylinder after a single expansion. The double expansion engine, on the other hand, captures this wasted energy by allowing the steam to expand in a second cylinder, further extracting useful work from the steam before it is exhausted.This two-stage process not only increases the efficiency of the engine but also reduces fuel consumption and operational costs. The double expansion engine was particularly important during the late 19th and early 20th centuries when industries were rapidly expanding, and the demand for more powerful engines was growing. By utilizing this innovative design, engineers were able to create locomotives and ships that could travel faster and carry heavier loads than ever before.One of the most notable applications of the double expansion engine was in marine propulsion. Ships equipped with these engines were able to traverse long distances with greater speed and efficiency, revolutionizing maritime transport. The ability to harness steam power more effectively allowed for the expansion of trade routes and the growth of global commerce. Furthermore, the double expansion engine played a crucial role in the development of naval vessels, enabling countries to enhance their naval capabilities during a time of significant geopolitical change.In addition to its practical applications, the double expansion engine also represents a key moment in the history of engineering innovation. It exemplifies how engineers and inventors continuously strive to improve existing technologies, leading to breakthroughs that have lasting impacts on society. The principles behind the double expansion engine continue to influence modern engineering, particularly in the fields of thermodynamics and mechanical design.Today, while steam engines are no longer the primary source of power in most industries, the legacy of the double expansion engine persists. Its design principles can be seen in various modern engines and turbines, where efficiency and performance remain paramount. Additionally, the historical significance of the double expansion engine serves as a reminder of the importance of innovation and the relentless pursuit of improvement in engineering disciplines.In conclusion, the double expansion engine is not just a piece of machinery; it is a symbol of progress and ingenuity in the field of engineering. By studying its design and impact, we gain a deeper appreciation for the technological advancements that have shaped our world. The double expansion engine exemplifies the power of human creativity and the ongoing quest for efficiency in the face of ever-increasing demands for energy and transportation. As we look to the future, the lessons learned from the double expansion engine will undoubtedly continue to inspire engineers and innovators for generations to come.

蒸汽机的历史是一段引人入胜的旅程，突显了技术和工程的发展。在这个领域的众多创新中，双扩张发动机作为一种显著的进步，极大地提高了蒸汽机的效率和功率输出。理解双扩张发动机的机制和应用能够为我们提供对现代工程实践发展的宝贵见解。双扩张发动机基于在两个阶段扩展蒸汽的原理，这使得蒸汽产生的能量得以更有效地利用。在传统的单扩张发动机中，蒸汽被引入一个气缸，在那里它扩展并推动活塞产生运动。然而，在单次扩张后，蒸汽的许多能量被浪费掉了。相反，双扩张发动机通过允许蒸汽在第二个气缸中扩展来捕获这些浪费的能量，在排放之前进一步提取有用的工作。这一双阶段过程不仅提高了发动机的效率，还减少了燃料消耗和运营成本。双扩张发动机在19世纪末和20世纪初尤其重要，当时工业迅速扩张，对更强大发动机的需求不断增加。通过利用这一创新设计，工程师们能够制造出比以往更快、能够承载更重负荷的机车和船只。双扩张发动机最显著的应用之一是在海洋推进中。装备这种发动机的船舶能够以更高的速度和效率航行长距离，彻底改变了海上运输。更有效地利用蒸汽动力的能力促进了贸易路线的扩展和全球商业的增长。此外，双扩张发动机在海军舰艇的发展中发挥了关键作用，使各国能够在地缘政治变革的重要时期增强其海军能力。除了其实际应用外，双扩张发动机还代表了工程创新历史上的一个关键时刻。它体现了工程师和发明家不断努力改善现有技术，从而导致突破性进展，这些进展对社会产生了持久影响。双扩张发动机背后的原则继续影响现代工程，特别是在热力学和机械设计领域。如今，尽管蒸汽机不再是大多数行业的主要动力来源，但双扩张发动机的遗产依然存在。其设计原则可以在各种现代发动机和涡轮机中看到，在这些领域，效率和性能仍然至关重要。此外，双扩张发动机的历史意义提醒我们创新的重要性，以及在面对日益增长的能源和运输需求时不断追求改进的必要性。总之，双扩张发动机不仅仅是一台机械设备；它是工程领域进步和独创性的象征。通过研究其设计和影响，我们对塑造我们世界的技术进步有了更深的理解。双扩张发动机体现了人类创造力的力量，以及在面对对能源和运输的不断增加的需求时追求效率的持续努力。展望未来，从双扩张发动机中汲取的教训无疑将继续激励未来几代的工程师和创新者。