The Red Era, the Opening University Speech

Chapter 440 Twin-Scroll Turbine Design

In the car.

While sitting in the car, Li Mu continued to check the information about the 4-axis CNC machine tool in his mind.

Before we knew it, we arrived near Beijing Film Studio.

But he was so absorbed in his studies that he did not notice that he was almost there.

Seeing this, Guan Jianmin, who was driving in front, turned his head slightly, ready to inform him.

Just then, several students suddenly jumped out from the front.

With a "whoosh" sound, the car stopped precariously in front of them.

This sudden change startled Li Mu, and he quickly raised his head to check the situation.

He heaved a sigh of relief when he saw that there were only a few frightened students.

Guan Jianmin, who was driving in front, and Zhao Canjun, who was sitting in the passenger seat, got out of the car immediately and said, "Classmates, are you injured? Do you want to go to the hospital?"

"I, we're fine, sorry, we didn't mean it!" Several students waved their hands quickly.

They were Liu Xian and her group.

Originally, a few people just wanted to take a look from a distance.

But they didn't expect that Li Mu's car was covered tightly. They followed for a long time but didn't see anything, so they couldn't help but get closer and closer.

In the end, he even went around to the front of the car to take a look.

Unexpectedly, a group of people squeezed together and squeezed out, and were almost hit by a car.

"It's okay. We drove carelessly. I apologize to you." Li Mu got out of the car, looked at several students, and said in a gentle voice.

When they saw him, the eyes of several students who had been nervous suddenly widened and they looked incredulous.

Seeing this, Guan Jianmin and General Zhao were not surprised.

After all, every student knows Li Mu, so it is normal to be recognized.

"Li, Consultant Li, it's really you!" Liu Xian said stutteringly.

Hearing this, Li Mu smiled and said, "It's me."

"Ah, I'm sorry, I'm sorry, it's not your fault, you shouldn't apologize. It's because we wanted to see who the scientist who came to Beijing Film Studio was, so..." Liu Xian reacted and hurriedly explained.

She quickly recounted the whole story.

When he heard that Beijing Film Studio had made such a big fuss to welcome him.

Li Mu couldn't help but frown.

Didn't I say I don't like big scenes? Why are you still doing this?

——Aren’t Beijing Film Studio and they not from the same system?

That's fine.

"You don't need to apologize, and you don't need to feel embarrassed." Li Mu stepped forward and looked at Liu Xian and several other students, then continued:
"Well, since it's me that forced your tour to be interrupted, why don't you continue the tour with me?"

face his invitation.

Several students felt as if they were falling into a cloud of mist, as if they were dreaming.

They all felt very satisfied to meet Li Mu, and it was such a great honor to have him accompany them on the tour!
Liu Xian was the quickest to respond and said, "We are willing!"

With her taking the lead, the students who had come to their senses also hurriedly nodded. Only a fool would refuse.

……

Therefore, Li Mu's team that visited Beijing Film Studio expanded from three people to seven people.

Because it was less than a few hundred meters away from the gate of Beijing Film Studio.

Plus there was not enough room in the car.

He did not continue to take the car, but instead led everyone there on foot.

After walking a few steps, he saw a large group of people lined up on both sides of the open space in front of the gate of Beijing Film Studio, with big red flowers on their chests and colorful flags in their hands.

See them coming.

A few people in the front of the crowd first looked over here, then ran over here quickly.

At the same time, the guard of honor at the door began to beat drums and gongs and dance, and kept shouting and cheering: "Welcome Consultant Li to visit Beijing Film Studio!"

Streamers are flying and gongs and drums are beating.

Looking at the lively scene in front of me, I looked back at the six lonely people I brought with me, and the autumn sweaters I had casually put on in the morning.

Li Mu felt as if he was a little disrespectful.

Moreover, four of these six people were brought in by chance. Originally there were only Guan Jianmin and Zhao Canjun, which was really a bit shabby.

Just when Li Mu was distracted.

Tian Fang also rushed over with his men, and as soon as they met, he said:

"Advisor Li, I'm Tian Fang, the director of Beijing Film Studio. I'm sorry for not coming to meet you in person!"

"Director Tian, ​​you are too polite." Li Mu smiled and shook hands with the other party, then said:
"Besides, I feel a little embarrassed that you made such a big scene to welcome me."

Upon hearing this, Tian Fang said:

"Hey, these are nothing, they are all what we should do."

"Not to mention the many contributions you have made to the country."

"Many of our comrades in the factory also respect and admire you very much. Even if I don't organize them, they will come here on their own."

As he spoke, he made a gesture of invitation and took Li Mu towards the Beijing Film Studio.

The employees of Beijing Film Studio who were welcoming them from a distance saw their director slowly approaching with his men, and the doubtful looks on their faces completely disappeared.

Instead, his face was filled with excitement and joy.

It’s really Consultant Li Mu!
When the factory manager told them about it, they didn't believe it.

After all, there is really no connection between a scientist and a film studio.

Hearing the sudden rise in cheers, Tian Fang smiled and said, "Advisor Li, look, let me tell you, everyone welcomes you very much."

It wasn't that he intended to hide it from the people below.

However, there are more than a thousand people in Beijing Film Studio, which means more than a thousand mouths. If the news leaks out, there will inevitably be a lot of trouble.

"Hello, everyone!" Li Mu smiled at Tian Fang, then happily waved and greeted the workers at Beijing Film Studio.

There was a sudden roar of response from below: "Hello, Consultant Li!"

……

After the welcoming ceremony.

Li Mu and his group followed Tian Fang into the Beijing Film Studio.

As they walked inside, the latter introduced the history of Beijing Film Studio to him.

Beijing Film Studio was founded in 49 and has three old buildings from the 3s, including the main building, the printing and developing building, and the recording and editing building.

These places are mainly responsible for the production and post-production of films.

In the main area of ​​the studio, there are 136 acres of land where the film culture sculpture park, film museum area and film culture corridor area are planned to be built.

Many movies that are deeply loved by the general public were born here, such as "Longxugou", "Blessing", "Red Flag" and so on.

Listening to Tian Fang's introduction, Li Mu had a basic understanding of the development of Xia Country's film industry at that time.

The result was naturally as expected, the development was really mediocre.

Of course, it cannot be said that they didn’t make good movies.

However, the main purpose of making these films is still for publicity.

If this continues, not only will the subject matter become rigid, but the filming mindset will also become rigid, and there will be no possibility of going international.

Just when Li Mu frowned slightly.

Tian Fang, who was accompanying him, also noticed something was wrong.

He first asked the person who was introducing the recording and editing equipment to stop for a moment, and then asked, "Advisor Li, do you have anything to say?"

"Indeed there is one thing. The movies produced by our factory are pretty good, but the equipment should also keep pace with the times. Televisions are all in color, so it would be inappropriate to shoot black and white movies." Li Mu came back to his senses and said.

He came here just to investigate the situation, so there was no need to say too much.

Of course, it is okay to make some small suggestions.

Hearing this, Tian Fang smiled bitterly and said:

"Advisor Li, it's not that easy. The cost of shooting a color movie is much higher than that of a black and white movie."

“And screening is also a big problem.”

"The projectors we have now are generally hand-cranked and film-based, and cannot support color movie playback at all."

He clearly understood the importance of color.

However, given the current situation in the country, it is really impossible to shoot color movies.

Because even if you shoot it, everyone will still watch it in black and white in the end, which is not worth it.

"Hasn't anyone developed a color projector?" Li Mu was stunned and asked.

Tian Fang shook his head. They really didn’t have a color projector.

He had heard that it was available abroad, but it was very expensive. At least it was impossible for China to devote the money to research and produce it at the moment.

Seeing this, Li Mu nodded slightly and said, "It's okay, if you don't have it, then forget it. Maybe you won't need it in the future."

The color projector uses color film, which is quite expensive, costing about $1M per roll.

Although it was nothing for him to take out the machine, there was absolutely no need to build such a backward machine.

Since we already have semiconductor cameras, it is also very simple to make a digital projector.

Moreover, whether in terms of image quality, maintenance cost, operation method, etc., digital projectors are more advanced than color projectors.

"Oh, why do you say that?" Tian Fang asked puzzledly.

The leaders of Beijing Film Studio who were accompanying him, as well as students like Liu Xian, also looked at Li Mu with curiosity.

After all, in their minds.

After the black and white projector, it's time for the color projector.

Li Mu said:
"The current technical conditions are mature. We don't need to follow the old path of foreign countries. We can develop new, cheaper and more convenient equipment."

"You know semiconductor cameras, right?"

"It can also shoot video, and it doesn't require a lot of film. It's also very convenient to store, just a small storage disk..."

He gave a simple example and talked about the changes in video storage methods in the future.

Film projectors will not be eliminated, but they will definitely be replaced by digital projectors that have lower production costs, higher efficiency, more stable projection, and easier transmission and distribution.

"If we really have such equipment, then our country's film industry will surely take a big step forward!" Tian Fang couldn't help but sigh after listening.

The others also looked shocked.

Just by listening to Li Mu's description, they could imagine what the scene was like.

By then, film screenings will no longer be a rare thing, and people in the countryside will no longer have to wait for the projectionist to come to the countryside to watch movies.

"It's just a slight improvement. It's a bit of an exaggeration to say it's a big step forward." Li Mu shook his head and said.

However, even though he said this, the joy on Tian Fang's face still did not fade.

But suddenly, he seemed to think of something, and said hesitantly, "Advisor Li, I have something to say, but I don't know if I should say it."

"It's okay, Director Tian, ​​just speak frankly." Li Mu said.

Hearing this, Tian Fang said, "For us, the development of the film industry is of course a very important matter."

"But you are a scientist, and one who has made so many outstanding achievements."

"I really don't understand why you are suddenly so interested in movies?"

After he finished speaking, the people around him suddenly reacted.

Yes, why did Consultant Li Mu suddenly come to study film equipment?
Although movies are an indispensable part of culture and art, compared with his previous research, they are insignificant to the great contribution of Xiaguo.

Li Mu smiled and said slowly:
"Culture is the foundation of a nation and the pillar of a nation's spirit. And film is part of the cultural industry, so I don't think it is inferior to the research I do."

"And Director Tian, ​​don't worry, I'm not 'not doing my job'."

"It's just a matter of developing some new equipment. It doesn't take much effort. If it can play a role in the development of our country's film industry, I will be honored!"

His words made everyone around him straighten their backs and feel a sense of pride in their hearts.

"You can't compare them like that, and how dare I say that you have a proper job?" Tian Fang said, wiping the sweat from his forehead.

If people knew that he said this about Li Mu, he would probably be drowned in spit.

After all, his achievements are undoubtedly the most dazzling since the establishment of the New Xia Kingdom, and no one will be able to surpass them within a hundred years.

……

Then the tour continued.

After Tian Fang knew that Li Mu was interested in developing the film industry, he introduced it more enthusiastically.

In addition to introducing Beijing Film Studio.

He also talked about a film that he is preparing to shoot recently - "Heroic Sons and Daughters".

"The script of this movie was written by Comrade Wu Chao. The content has been almost completed. We are just waiting to select the actors before we can start filming..." When it comes to movies, Tian Fang can talk endlessly.

"Heroic Sons and Daughters" is a war film that tells the story of how after the soldier Wang Cheng who was supporting the north was killed, his sister Wang Fang continued to fight with the help of the clerk Wang Wenqing, and eventually they reunited on the battlefield with their adoptive father Wang Fubiao.

He will also participate in the performance and play the role of political commissar Wang Wenqing.

……

It took two hours.

Li Mucai finished his visit to the Beijing Film Studio and also listened to Tian Fang's introduction to some of the films he was going to make in the future.

In fact, he is quite positive about these films.

For example, "Heroic Sons and Daughters" is a very good war film.

He also does not intend to deny the value of these films.

Making money from those OM idiots is one thing, but it doesn't mean you need to deny the correctness of the things you shoot.

These movies that commemorate the most lovable people will never go out of style no matter when they are released.

Of course, the premise is that you don’t make a movie about tearing up your daily life.

……

After a simple meal in the canteen of Beijing Film Studio.

Li Mu stood up and prepared to leave.

After all, there is also the Science and Technology Film Studio, so I have to go and see it.

Tian Fang watched Li Mu leave and stood at the gate for a long time without coming to his senses.

"It's still worrying!" He sighed slightly and murmured unconsciously.

……

into the night.

After Li Mu finished visiting the Science and Film Studio, he returned home.

He leaned back on the sofa, taking a short nap while considering whether or not to get involved in the filming of the movie.

After all, judging from the current situation, the themes of the films shot by Xia Guo are too monotonous.

“But if I intervene, it might become a problem during special times in the future,” he sighed inwardly.

Although it helped Xia Kingdom achieve good development.

But that history has to come.

If we shoot other subjects now, we may easily become the target of criticism in the future.

Although there is no danger, you still have to hide to avoid becoming someone else's target.

"Forget it, let's just study it honestly." Li Mu sat up and made a decision quickly.

The timing now is indeed not appropriate.

People may not necessarily accept works of other themes.

……

The next day, early.

Li Mu got up early, washed up, and exercised, then rushed to the Automotive Research Institute.

Although it was 6 o'clock in the morning, the lights in the laboratory building were already on.

He walked quickly towards the laboratory.

As soon as I arrived at the door, I saw expert professors such as Yang Ying and Luo Yu, as well as Zhang Kemao and Wang Zerong.

They were discussing the problem of supercharging tank engines.

Through supercharging, the engine's intake pressure can be increased, thereby increasing fuel combustion efficiency, improving power output and fuel economy.

In the 60s, the main boosting technology for tank engines was exhaust gas turbocharging.

This technology can use the exhaust gas discharged by the engine to drive the turbine, thereby compressing the intake air and increasing the intake density, thereby increasing the engine's power and torque.

However, this kind of supercharging alone cannot meet the performance requirements of the Xuanwu-1 main battle heavy tank engine.

So Li Mu proposed another technology to them - twin turbocharging.

But looking at the situation of the crowd, it was obvious that they had encountered considerable difficulties.

For example, turbo lag, mechanical structure, system integration, etc.

He stood at the door and listened for a moment before walking in, clapping his hands and saying, "Everyone, I'm back."

"Advisor Li!" Upon hearing the voice, everyone was shocked and turned around happily.

Yang Ying rushed forward and said, "You are finally back. These days, I have been pulling out my hair because of the twin-turbocharger problem!"

"Haha, then you have to take it easy, otherwise the winter in Kyoto will be a bit freezing." Li Mu joked.

Everyone couldn't help but burst into laughter when they heard this.

This little joke eased the slightly tense atmosphere in the laboratory.

Li Mu then continued under everyone's expectant gaze:
"I understand what you just said. Turbo lag is the discontinuity in power output that occurs when a large turbine is connected at high engine speeds."

"To reduce lag, my idea was to use a twin-scroll turbo design."

"By dividing the exhaust pipe into two groups, each group is connected to a scroll pipe. This design can reduce the exhaust interference between different cylinders and the turbo lag phenomenon..."

He casually proposed a solution, which made everyone who were just scratching their heads suddenly brighten up. They took out paper and pen and started to record quickly.

Seeing them like this.

Then I thought about the fact that I might have to leave for a few days in the future.

Li Mu simply proposed another method, variable-section turbocharging technology.

With these two technologies, the problem of turbo lag can basically be solved.

He said slowly:

“In fact, to put it simply, it is to increase the guide vanes with adjustable vortex cross-section.”

"These guide vanes close at low speeds and low exhaust volumes, increasing the engine's intake pressure."

"Under high-speed and high-exhaust conditions, the guide vanes will reopen to optimize the turbocharger's boost effect..."

That’s it for the turbo lag issue.

Li Mu continued to talk about the solutions for mechanical structure and system integration.

The twin-turbocharger system requires higher mechanical strength and durability, so the speed and temperature of the turbine will increase significantly, placing higher demands on the mechanical structure.

To solve this problem, we must first optimize the materials and manufacturing processes, such as using high-strength, high-temperature resistant titanium alloys and ceramic materials.

Or improve the cooling system, use high-quality lubricants, etc.

Then comes system integration.

However, this is hard work, and it can only be achieved through continuous complex integration and debugging of software and hardware to ensure that the two turbines can work efficiently under different working conditions.

……

I was busy until almost noon.

Li Mucai explained the technical difficulties of the twin-turbocharged engine in detail.

These contents are enough for Yang Ying and others to study for five or six days, and enough to last until he takes the test.

Except for the engine though.

There is also weapons research that needs to be addressed.

after eating.

He then rushed to the weapons group where Zhang Shushun was.

Ever since he proposed the idea of ​​developing the gun-launched D-projectile and the fin-stabilized discarding sabot armor-piercing projectile, the latter and the people he brought from the Institute of Equipment Science and Technology have been drawing the design drawings.

There has been some progress, but it has not been rapid.

According to Zhang Shushun's own estimation, given their current situation, it would take at least two to three years to develop both types of shells.

Of course, this is without Li Mu's help.

……

In the laboratory.

Zhang Shushun and a group of researchers were discussing a blueprint on the table.

These days.

Based on the principles Li Mu mentioned, they drew a preliminary design.

However, this picture still has many flaws and shortcomings.

The main structure is very simple, consisting of only two parts: the projectile and the charge.

The projectile part consists of a flying body and a shedding part, while the charge part is used to provide explosive energy.

Their current idea is to design a flying body consisting of a hood, armor-piercing head, body and tail.

The hood is used to reduce resistance during flight, the armor-piercing head is the main part of the armor-piercing projectile, the body provides structural support, and the tail is used to stabilize the flight.

The detached part refers to the process in which the outer layer of the projectile is sieved off during the shelling process, exposing the internal armor-piercing core, thereby improving the armor-piercing capability.

Li Mu walked quietly into the house, listened to the whispered discussion of Zhang Shushun and others, and nodded with satisfaction.

The general idea is fine. If we continue to study it, we will definitely be able to develop a fin-stabilized armor-piercing discarding sabot projectile.

As he approached.

Zhang Shushun, whose eyes had never left the drawing, reached out to pick up the pencil next to him.

Just when I reached over and was about to continue drawing, I suddenly found that only a small section of the pencil the size of a fingernail was left.

(End of this chapter)