ramjet

简明释义

英[ˈræmˌdʒet]美[ˈræmdʒet]

n. [航] 冲压式喷气发动机

英英释义

单词用法

同义词

反义词

例句

1.The objective of these studies is to gather data that enable them to adapt the test chamber for ramjet tests.

的目的，这些研究是收集数据，使他们能够适应的试验室的冲压发动机试验。

2.The ramjet performance is calculated and compared with fixed and continuous adjustable structure intake and nozzle in this paper.

本研究对具有固定、连续可调进气道和尾喷管的冲压发动机性能进行了计算和比较。

3.Ramjet engines have traditionally used liquid fuel which is mixed with atmospheric air and burned to provide thrust for high-speed flight.

传统的冲压喷气发动机使用液体燃料并与大气中的空气混合燃烧，以提供高速飞行的推力。

4.Therefore, it is very important and necessary to specially research the heat transfer and ablation properties of insulation in ramjet chamber.

因此，开展固体冲压发动机补燃室内绝热层传热烧蚀特性研究，就显得非常有意义。

5.A simple, essentially tubular jet engine, such as a ramjet.

冲压喷气发动机是这三种最简单的一种。

6.A complete line of Horizontal Wet Process Equipment Incorporating Ramjet Technology.

结合冲压式技术，一条完整的湿流程设备水平线。

7.A simple, essentially tubular jet engine, such as a ramjet.

压式喷气发动机一种简单的，主要为管道式的喷气发动机，如。

8.The ramjet engine is a type of air-breathing engine that uses the forward motion of the vehicle to compress incoming air.

这种冲压喷气发动机是一种空气呼吸发动机，利用车辆的前进运动来压缩进入的空气。

9.In supersonic flight, the ramjet can achieve higher speeds than turbojet engines.

在超音速飞行中，冲压喷气发动机能够达到比涡轮喷气发动机更高的速度。

10.The design of a ramjet requires careful consideration of airflow and combustion processes.

设计一个冲压喷气发动机需要仔细考虑气流和燃烧过程。

11.Military missiles often utilize ramjet technology for increased speed and range.

军用导弹通常利用冲压喷气发动机技术以提高速度和射程。

12.A ramjet operates efficiently at high speeds but is less effective at low speeds.

一种冲压喷气发动机在高速下运行效率高，但在低速下效果较差。

作文

The evolution of aerospace technology has brought about numerous innovations, one of which is the concept of the ramjet. A ramjet is a type of jet engine that utilizes the engine's forward motion to compress incoming air without the need for a rotating compressor. This simple yet effective design makes it particularly suitable for high-speed aircraft and missiles. The ramjet operates efficiently at supersonic speeds, where traditional jet engines may struggle due to the limitations of their mechanical components. The fundamental principle behind the ramjet is based on the physics of airflow. As the aircraft travels at high speeds, air enters the engine's intake and is compressed by the forward motion of the vehicle. This compressed air then mixes with fuel and ignites in the combustion chamber, producing thrust that propels the aircraft forward. Unlike turbojet engines, which require complex machinery to compress air, the ramjet relies solely on its speed, making it lighter and simpler in design. Historically, the ramjet was first proposed in the early 20th century, but it gained significant attention during the Cold War era when military applications became apparent. The ability to achieve high speeds without the weight of additional mechanical components made the ramjet an attractive option for missile systems. For instance, the BrahMos missile, developed by India and Russia, employs a ramjet engine, allowing it to reach speeds over Mach 3, making it one of the fastest cruise missiles in the world. In addition to military uses, the ramjet also has potential applications in civilian aerospace. Researchers have been exploring the possibility of using ramjet technology for commercial hypersonic travel, which could drastically reduce flight times across the globe. Imagine traveling from New York to Tokyo in under two hours; this dream could become a reality with advancements in ramjet technology. However, there are challenges associated with the ramjet. One significant limitation is its inability to operate efficiently at low speeds. A ramjet requires an initial boost to reach the necessary velocity for efficient operation, which means it cannot take off or land like conventional aircraft. This necessitates the use of other propulsion systems for takeoff and landing phases, adding complexity to the overall design. Moreover, the ramjet is not suitable for all flight profiles. It performs best at high altitudes and speeds, where the atmosphere is thinner, and drag is reduced. Consequently, engineers must carefully consider the operational envelope of a vehicle employing a ramjet engine. In conclusion, the ramjet represents a fascinating advancement in aerospace technology. Its unique design allows for high-speed travel without the complexities of traditional jet engines. While it has primarily found its niche in military applications, the potential for civilian use is immense. As research continues and technology progresses, we may soon see the ramjet play a pivotal role in the future of air travel, transforming how we connect across vast distances. The journey of understanding and developing the ramjet is just beginning, and its impact on aviation could be revolutionary, opening new frontiers in speed and efficiency.

航空航天技术的演变带来了许多创新，其中之一就是冲压发动机的概念。冲压发动机是一种喷气发动机，利用发动机的前进运动来压缩进入的空气，而无需旋转压缩机。这种简单而有效的设计使其特别适合高速飞机和导弹。冲压发动机在超音速速度下运行效率高，而传统喷气发动机可能会因其机械部件的限制而苦苦挣扎。 冲压发动机的基本原理基于气流物理学。当飞机以高速飞行时，空气进入发动机的进气口，并通过飞行器的前进运动被压缩。这些压缩空气随后与燃料混合并在燃烧室中点燃，产生推力，推动飞机向前。与需要复杂机械来压缩空气的涡轮喷气发动机不同，冲压发动机完全依赖于其速度，使其在设计上更轻便、更简单。 历史上，冲压发动机最早在20世纪初被提出，但在冷战时期，当军事应用变得明显时，它引起了广泛关注。由于能够在不增加额外机械部件重量的情况下实现高速，冲压发动机成为导弹系统的一个有吸引力的选择。例如，由印度和俄罗斯开发的布拉莫斯导弹就采用了冲压发动机，使其能够达到超过马赫3的速度，成为世界上最快的巡航导弹之一。 除了军事用途，冲压发动机在民用航空方面也具有潜在应用。研究人员一直在探索使用冲压发动机技术进行商业超音速旅行的可能性，这可能大幅度减少全球航班时间。想象一下，从纽约到东京的旅行在两个小时内完成；随着冲压发动机技术的进步，这一梦想可能会成为现实。 然而，冲压发动机也面临着挑战。一个重要的限制是它在低速下无法高效运行。冲压发动机需要初始加速才能达到高效运行所需的速度，这意味着它无法像传统飞机那样起飞或着陆。这就需要在起飞和着陆阶段使用其他推进系统，从而增加了整体设计的复杂性。 此外，冲压发动机并不适用于所有飞行轨迹。它在高空和高速下表现最佳，此时大气较薄，阻力减小。因此，工程师必须仔细考虑使用冲压发动机发动机的飞行器的操作范围。 总之，冲压发动机代表了航空航天技术的一项迷人进步。其独特的设计允许高速旅行，而不必依赖传统喷气发动机的复杂性。虽然它主要在军事应用中找到了自己的定位，但其在民用领域的潜力巨大。随着研究的持续和技术的进步，我们可能很快就会看到冲压发动机在未来航空旅行中发挥关键作用，改变我们跨越广阔距离的连接方式。理解和发展冲压发动机的旅程才刚刚开始，其对航空的影响可能是革命性的，为速度和效率开辟新的边界。