propellants

简明释义

英[prəˈpɛlənts]美[prəˈpɛlənts]

n. [航]推进剂（propellant 的复数）

英英释义

单词用法

同义词

反义词

例句

1.The mechanical properties of propellants formulation, which contains PEO binder and is plasticized by nitrate ester were studied.

对聚氧化乙烯(peo)为粘合剂硝酸酯增塑的高能推进剂配方力学性能进行了研究。

2.Closed burner method is used for determining burning rate of the solid propellants.

密闭燃烧器法是一种间接测定固体推进剂燃速的方法。

3.The combustion performance and energy property of propellants containing nano-aluminum were also studied.

并对含纳米铝粉推进剂的燃烧性能、能量性能进行了测定。

4.Experimental results show that pressure sensitivity of UHBR propellants may be reduced in this way.

证实用这种方法可以降低UHBR燃烧过程的表观压力指数。

5.The use of chain extenders ACTS as an important way to control the morphological structure of HTPB propellants binder matrix.

把扩链剂的使用作为调整丁羟推进剂粘合剂网络及其形态结构的一个重要手段。

6.The dynamic response of the above two kinds of propellants are studied by dynamic compaction and spall experiment.

在动态压缩实验的基础上，本文对两种典型推进剂层裂过程进行了研究。

7.This is true of almost all aerosol propellants.

几乎所有的气雾剂推进剂都是这样。

8.Some aerosol sprays contain harmful propellants that can damage the ozone layer.

一些气雾剂含有有害的推进剂，可能会破坏臭氧层。

9.Many modern engines utilize environmentally friendly propellants to reduce emissions.

许多现代发动机使用环保的推进剂来减少排放。

10.The choice of propellants can significantly affect the performance of a spacecraft.

选择的推进剂可以显著影响航天器的性能。

11.The rocket uses liquid oxygen and hydrogen as its main propellants.

这枚火箭使用液氧和氢作为其主要推进剂。

12.In the aerospace industry, engineers are constantly researching new propellants for improved efficiency.

在航空航天工业中，工程师们不断研究新的推进剂以提高效率。

作文

In the realm of aerospace engineering, the term propellants refers to substances that are used to produce thrust in rockets and other vehicles. These materials play a crucial role in enabling spacecraft to escape the Earth's gravitational pull and travel into outer space. The science behind propellants is fascinating, as it combines chemistry, physics, and engineering principles to create the necessary force for propulsion.There are two main types of propellants: solid and liquid. Solid propellants are typically composed of a mixture of fuel and oxidizer that are combined into a solid form. When ignited, they burn uniformly, producing hot gases that expand rapidly and are expelled out of the rocket nozzle, generating thrust. An example of a solid propellant is the mixture used in the Space Shuttle's Solid Rocket Boosters (SRBs), which provided the necessary lift during launch.On the other hand, liquid propellants consist of separate fuel and oxidizer that are stored in tanks and pumped into a combustion chamber where they mix and ignite. This type of propellant allows for more control over the thrust produced, as the flow rates of the fuel and oxidizer can be adjusted. A well-known example of liquid propellants is the combination of liquid oxygen (LOX) and RP-1, a refined form of kerosene, used in the first stage of the Falcon 9 rocket.The choice of propellants is critical for the success of any space mission. Engineers must consider various factors such as energy density, storage stability, and environmental impact when selecting propellants. For instance, while some propellants provide high thrust, they may also produce harmful emissions or be difficult to handle. Therefore, research and development in this field are ongoing, with scientists exploring greener alternatives to traditional propellants that could minimize the ecological footprint of space exploration.Moreover, the advancements in propellants technology have significantly impacted the future of space travel. With the rise of commercial spaceflight, companies like SpaceX and Blue Origin are constantly innovating to improve the efficiency and safety of their propellants. These innovations not only enhance the performance of rockets but also reduce costs, making space more accessible to a broader audience.In conclusion, propellants are vital components in the field of aerospace engineering, serving as the driving force behind rocket propulsion. Understanding the different types of propellants and their applications is essential for anyone interested in the science of space travel. As we continue to explore the cosmos, the development of more efficient and environmentally friendly propellants will play a pivotal role in shaping the future of humanity's journey beyond our planet.

在航空航天工程领域，术语propellants指的是用于产生推力的物质，这些物质被应用于火箭和其他飞行器。这些材料在使航天器逃离地球引力、进入外太空方面发挥着至关重要的作用。propellants背后的科学是迷人的，因为它结合了化学、物理和工程原理，以创造出推进所需的力量。propellants主要有两种类型：固体和液体。固体propellants通常由燃料和氧化剂的混合物组成，这些成分被组合成固体形式。当点燃时，它们均匀燃烧，产生快速膨胀的热气体，并通过火箭喷嘴排出，从而产生推力。固体propellants的一个例子是用于航天飞机固体火箭助推器（SRBs）中的混合物，它在发射过程中提供了必要的升力。另一方面，液体propellants由单独的燃料和氧化剂组成，这些成分储存在油箱中，并泵入燃烧室，在那里它们混合并点燃。这种类型的propellants允许对产生的推力进行更多控制，因为可以调整燃料和氧化剂的流量。液体propellants的一个著名例子是液氧（LOX）和RP-1（经过精炼的煤油）的组合，后者用于猎鹰9号火箭的第一阶段。选择propellants对于任何太空任务的成功至关重要。工程师在选择propellants时必须考虑多种因素，例如能量密度、储存稳定性和环境影响。例如，尽管某些propellants提供高推力，但它们可能也会产生有害排放或难以处理。因此，这个领域的研究和开发仍在继续，科学家们正在探索比传统propellants更环保的替代品，以尽量减少太空探索的生态足迹。此外，propellants技术的进步对未来的太空旅行产生了重大影响。随着商业航天的兴起，像SpaceX和蓝色起源这样的公司不断创新，以提高其propellants的效率和安全性。这些创新不仅增强了火箭的性能，还降低了成本，使太空对更广泛的受众更加可及。总之，propellants是航空航天工程领域的重要组成部分，是火箭推进的驱动力。理解不同类型的propellants及其应用对于任何对太空旅行科学感兴趣的人来说都是至关重要的。随着我们继续探索宇宙，更高效和环保的propellants的发展将在塑造人类超越地球的未来旅程中发挥关键作用。