"Rocket" mechanical energy, internal energy and their transformation PPT courseware 2

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"Rocket" mechanical energy, internal energy and their transformation PPT courseware 2

What does a rocket rely on to get into the sky?

1 Jet Engine: What is the difference between a jet engine and an internal combustion engine?

2 How Rockets Work: What is the working principle of rockets? How does it work?

Rocket launch process:

1. The rocket takes off and begins the programmed turn.

2. The rocket continues flying and throws away the escape tower.

3. Throw the booster.

4. The first and second stages of the rocket are separated and the fairing is separated.

5. Unfold the sailboard and fly the spacecraft around the earth according to the predetermined orbit.

6. The secondary engine shuts down, and then the ship and arrow separate.

3 Characteristics and uses of modern rockets:

Purpose: Early rockets were mainly used for war. Today, rockets can be used in both military and civilian applications. According to different flight missions, they can be roughly divided into three categories: sounding rockets, which are used for high-altitude atmospheric measurements; ballistic missiles, which are A controlled rocket with a warhead; a satellite (spacecraft) carrier that sends a satellite or spacecraft into orbit.

Features: It has huge power and can not only fly at high altitudes but also fly out of the atmosphere. Multi-stage rockets can be used as vehicles for interstellar navigation!

Multi-stage rocket:

Each stage of a three-stage rocket acts like an independent rocket. First, ignite the first-stage rocket, ignite the second-stage rocket (fall off), and then the third-stage rocket starts working.

The three-stage rocket is like a relay race, in that it accelerates based on the speed of the previous stage. Much superior to single stage rockets.

4 rocket fuel:

Most modern rockets use liquid fuel. The propellant of liquid rockets is liquid, and there are many combinations of fuel and oxidizer, such as alcohol and liquid oxygen, kerosene and liquid oxygen, liquid hydrogen and liquid oxygen, etc.

Liquid rockets have a long burning time and are easy to control. Controlling the delivery of propellant can stop and re-ignite the rocket, thereby controlling the rocket's flight speed and making it easy to control. Liquid rocket fuel is difficult to store and the cost is high.

China’s rocket development status:

China began to develop modern rockets in 1956.

On April 24, 1970, the "Long March 1" carrier rocket was born, and the first satellite "Dongfanghong 1" was successfully launched. Now, the "Long March" series of rockets have gone global, are famous all over the world, and occupy an important position in the international launch market.

At present, my country's Long March series of launch vehicles have successfully developed 7 models.

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Update Time: 2024-11-21

This template belongs to Physics courseware Beijing Normal University Ninth Grade Physics Volume 1 industry PPT template

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