heat shield

简明释义

挡热板

英英释义

例句

1.A damaged heat shield 热防护罩 can lead to catastrophic failure during space missions.

受损的热防护罩可能导致太空任务中的灾难性故障。

2.The spacecraft's heat shield 热防护罩 protects it from the intense heat during re-entry into the Earth's atmosphere.

宇宙飞船的热防护罩在重新进入地球大气层时保护它免受强烈的热量。

3.The heat shield 热防护罩 on the Mars rover must withstand extreme temperatures when landing.

火星探测器上的热防护罩在着陆时必须承受极端温度。

4.During the launch, the rocket's heat shield 热防护罩 ensures that the payload remains safe from high temperatures.

在发射过程中，火箭的热防护罩确保有效载荷安全免受高温影响。

5.Engineers are testing a new material for the heat shield 热防护罩 to improve its thermal resistance.

工程师们正在测试一种新材料，用于改善热防护罩的耐热性。

作文

In the realm of space exploration, technology plays a crucial role in ensuring the safety and success of missions. One of the most vital components of spacecraft design is the heat shield, which serves as a protective barrier against extreme temperatures encountered during atmospheric re-entry. The heat shield (热防护罩) is designed to absorb and dissipate the intense heat generated by friction with the atmosphere, preventing damage to the spacecraft and its occupants. When a spacecraft re-enters the Earth's atmosphere, it travels at incredibly high speeds, often exceeding 17,500 miles per hour. At such velocities, the air molecules collide with the surface of the spacecraft, generating heat that can reach temperatures of over 3,000 degrees Fahrenheit. Without a properly functioning heat shield (热防护罩), the spacecraft would succumb to this extreme heat, leading to catastrophic failure. The materials used in the construction of a heat shield (热防护罩) are specially selected for their thermal resistance properties. For example, NASA's Space Shuttle utilized a combination of ceramic tiles and reinforced carbon-carbon composites to protect against the intense heat of re-entry. These materials were engineered to withstand high temperatures while allowing the spacecraft to maintain structural integrity. Moreover, the design of the heat shield (热防护罩) is not only about material selection but also involves aerodynamics. The shape of the heat shield (热防护罩) is crucial in directing airflow and minimizing heat transfer. A well-designed heat shield (热防护罩) can create a shockwave in front of the spacecraft, which helps to reduce the amount of heat that reaches the surface. This principle is similar to how the nose cone of a rocket is shaped to manage airflow during ascent and descent. The importance of the heat shield (热防护罩) became evident during the Apollo missions, particularly Apollo 11, when astronauts first landed on the Moon and returned to Earth. The heat shield (热防护罩) was critical in protecting the Command Module during re-entry, ensuring that the astronauts safely returned home. This successful mission highlighted the significance of advanced technology in space travel and the necessity of reliable heat shields (热防护罩). In recent years, advancements in materials science have led to the development of new types of heat shields (热防护罩). For instance, the Mars Perseverance rover employed a unique heat shield (热防护罩) made from a lightweight material called PICA-X, which offers improved performance and reduced weight compared to traditional options. This innovation showcases the ongoing evolution of aerospace technology and the continual improvement of safety measures for future missions. In conclusion, the heat shield (热防护罩) is an essential component of any spacecraft designed for atmospheric re-entry. Its ability to withstand extreme temperatures and protect both the vehicle and its crew is paramount to the success of space missions. As technology continues to advance, we can expect even more efficient and effective heat shields (热防护罩) to be developed, paving the way for safer and more ambitious explorations beyond our planet.

在太空探索领域，技术在确保任务的安全和成功方面发挥着至关重要的作用。航天器设计中最重要的组成部分之一就是热防护罩，它作为一个保护屏障，抵御在大气再入过程中遇到的极端温度。热防护罩（heat shield）旨在吸收和散发与大气摩擦产生的强烈热量，从而防止航天器及其乘员受到损害。当航天器重新进入地球大气层时，它以极高的速度飞行，通常超过每小时17,500英里。在这样的速度下，空气分子与航天器表面碰撞，产生的热量可以达到超过3,000华氏度。如果没有一个正常工作的热防护罩（heat shield），航天器将无法承受这种极端的热量，导致灾难性的失败。用于构建热防护罩（heat shield）的材料是专门选择的，具有耐热性能。例如，NASA的航天飞机使用了陶瓷瓦和增强碳碳复合材料的组合，以保护航天器在再入过程中的强烈热量。这些材料经过工程设计，能够承受高温，同时保持航天器的结构完整性。此外，热防护罩（heat shield）的设计不仅涉及材料选择，还包括空气动力学。热防护罩（heat shield）的形状对于引导气流和最小化热传递至关重要。一个设计良好的热防护罩（heat shield）可以在航天器前方形成一个冲击波，从而帮助减少到达表面的热量。这一原理类似于火箭的鼻锥在升空和降落过程中如何管理气流。热防护罩（heat shield）的重要性在阿波罗任务中得到了体现，特别是在阿波罗11号任务中，当宇航员首次登陆月球并返回地球时。热防护罩（heat shield）在再入过程中保护指令舱，确保宇航员安全回家。这一成功的任务突显了先进技术在太空旅行中的重要性以及可靠的热防护罩（heat shield）的必要性。近年来，材料科学的进步促使新型热防护罩（heat shield）的发展。例如，火星“毅力”探测器采用了一种独特的热防护罩（heat shield），由一种名为PICA-X的轻质材料制成，与传统选项相比，提供了更好的性能和更低的重量。这一创新展示了航空航天技术的持续演变以及对未来任务安全措施的不断改进。总之，热防护罩（heat shield）是任何设计用于大气再入的航天器的基本组成部分。它承受极端温度并保护车辆及其乘员的能力对于太空任务的成功至关重要。随着技术的不断进步，我们可以期待开发出更高效、更有效的热防护罩（heat shield），为超越我们星球的更安全、更雄心勃勃的探索铺平道路。