Chapter 129 Visiting a gas turbine (please subscribe)

 “A sneeze!” Qin Tao sneezed.

 “Are you okay?” Zhao Ling asked with concern.

Qin Tao shook his head: "What can happen? Someone is probably scolding me behind my back. Okay, we are about to reach our destination."

 After coming out of the airport, the group of them had already taken several Geese cars and headed to the Southern Steam Turbine Factory.

Many people know Kuznetsov's name, because later Lao Maozi's aircraft carrier (the name was smooth, supposedly it was a heavy-duty aircraft-carrying cruiser more appropriately) was called the Kuznetsov, and was shortened to military fans. For pants ship.

However, if you talk about the later names, many people will know that after the collapse of the Soviet Union, Lao Maozi's various military industries were in recession. They had to save themselves, and some would join forces. The Southern Steam Turbine Factory was also located in After the merger, it was called Shuguang-Machine Design Gas Turbine Design and Manufacturing Scientific Production Consortium. (This name should be familiar to military fans. This organization seems to have another name, called the Kuznetsov Design Bureau. I don’t know if this Kuznetsov is the same as the Kuznetsov who built aviation turbine engines. One person did not find the Kuznetsov Design Bureau, which specializes in building gas turbines for ships.)

As for its location, it is in the city of Nikolaev. This military fan knows it even more clearly, because the official name of the famous Black Sea Shipyard is Nikolaev Shipyard.

That's right, Qin Tao and the others are currently in the city of Nikolayev in southern Ukraine.

 This is the administrative center of Gulayev Oblast, an important river port city and transportation hub in the south. At the same time, during the Tsarist Russia, it was already an important shipbuilding base.

At this time, cars were driving on the streets of Nikolayev. It can be seen that this is a clean and modern city with very wide streets, trees on both sides, and very beautiful scenery.

The ancient Gothic church flashed past, and a row of sculptures appeared in the field of vision again. Zhao Ling's eyes kept looking around, with a bright look on her face.

 “This is a beautiful city!”

“Yes, it is still an important industrial city.” Qin Tao looked into the distance, trying to see the Nikolayev Shipyard, but it was blocked by nearby buildings.

These European-style buildings make people feel like they are walking through the Middle Ages.

 The car drove into the Southern Steam Turbine Factory and stopped in front of a row of office buildings.

“Friends, we are here.” Nicholas warmly greeted everyone who got off the car.

"I heard before that when you come to the Soviet Union, you will never get lost, because every city is almost the same, and you can even find your own home. Of course, it may not be your own home inside, it may be someone else's home in another city. "Qin Tao said.

Nicholas smiled: "Yes, after World War II, we restored the city's appearance in just a few years. Only the great motherland can do that."

Although Nicholas digs into the corners of his motherland from time to time, he is still very proud of his country.

While speaking, the people inside had also come out, and a man with gray hair came forward: "Comrade Nicholas, I just received the news this morning, and you caught me off guard!"

“Popov, you look good.” Nicholas said, “Come, let me introduce you to you. These are guests from the East. They are very interested in your design bureau and came here to visit.”

 Popov, the person in charge of the Southern Steam Turbine Factory, is different from those tall and thick old men. He is of medium build and does not look very strong. Behind his black-rimmed glasses, he has the aura of a technician.

Wu Shengli and others came up, greeted each other, and then the group walked inside.

“Everyone, this is the most confidential design room of our design bureau. You are the first foreign guest to visit here.” Popov led everyone into a door, and a spectacular scene suddenly appeared inside.

 Just like a factory workshop, it is very vast inside, with hundreds of tables neatly arranged there. Next to each table, there is a huge drawing board, and many people are drawing on it.

 When they saw this scene, Wu Shengli and others were very surprised.

Isn't this too backward?

Even in China, ship design institutes have eliminated paper work. This was completely stimulated by the design of foreign ships in the 1980s. People asked to modify the design. As a result, the whole body was affected by one move, and everyone was dumbfounded. , working day and night.

 Later, computer-aided design began to be introduced, and it was very convenient to make changes.

 This backward work method is still used here?

At the same time, on these tables, you can still see some ancient hand-cranked computers. From time to time, people are shaking them. At the same time, more people are using slide rules. This special ruler can perform various calculations. In time, it is the favorite of designers.

but now…

“My friends, your skills are so skilled.” Qin Tao said with emotion: “We have some gifts for you, I hope you like them.”

 Qin Tao has already prepared various gifts, which are cheap and suitable for everyone’s liking.

Another big box was brought over. When the box was opened, all the old men present exclaimed: "Scientific calculator?"

In Qin Tao's previous life, he worked with many old men. Their professional skills were impeccable, especially their mathematical knowledge, which was very solid. They would often hold slide rules and perform various complex calculations, and they had a great time. , Qin Tao admired him very much.

However, when Qin Tao gave them a batch of scientific calculators, they immediately threw away the slide rules and started using computers. If there were good things, of course they would use them. They became familiar with the slide rules because they did not have them. Opportunity to use a calculator!

Calculator is a small, flexible, and easy-to-carry thing. It can only be produced after the chip industry has developed to a certain extent.

Lao Maozi also has them, not to mention simple addition, subtraction, multiplication and division calculators and scientific calculators that can perform complex function operations. In 1986, Lao Maozi also released the first electronic-85 calculator that can support basic language.

However, these calculators are too expensive and have low output. In many scientific research institutions, there are only a few of them, and they cannot be widely used. In recent years, Lao Maozi's precious foreign exchange has been used to import grain, and there is no There is no way to import these seemingly unimportant things. Anyway, these people in Lao Maozi Scientific Research Institute are also accustomed to using slide rules.

(Actually, although Lao Maozi attaches great importance to electron tubes, the development of the microelectronics industry is not as bad as advertised. Lao Maozi has imitated the 8080 series chips very early and also has his own microcomputers. However, Lao Maozi’s microelectronics industry is not It is very developed, but the output is not high, so it is impossible to equip various scientific research institutions with large quantities of equipment. When the Soviet Union collapsed, we got experts from Lao Maozi, and almost all of them were masters of using slide rules.)

 Now, when they saw the calculator, they were immediately pleasantly surprised.

"No, this is not a scientific calculator, this is a graphing calculator. Look, its screen is larger than an ordinary calculator!" Chief designer Sergey picked up the calculator and looked at the large screen. He murmured: "This is really good stuff!"

In this era, although there were no large-area LCD screens, LCD screens used to display numbers had long been popular. They had seen ordinary calculators with a long bar-shaped display on them. Now, the display of this calculator is not a strip shape, it is a rectangle. Under the sun, you can still see the LCD dot matrix inside. This is a high-end product!

 Sergey’s eyes looked at the logo at the top of the screen. On the left was the brand name, CASIO, and on the right was the specific model, fx-7000G.

 That’s right, this is the most high-end calculator just after entering the 1990s! It has an astonishing 13 internal calculation digits. In addition to simple four arithmetic operations, it also has various basic elementary functions, angle operations and coordinate transformation functions. It even has Abs (absolute value), Int (integer part extraction) ), Frac (decimal part extraction).

 Since it is for advanced user groups, the fraction, permutation and combination functions have been cancelled.

 Sergey holds this calculator like a child holding his favorite toy.

“It’s a pity that it doesn’t have the function of calculus.” Sergey looked at all the buttons and continued: “It would be great if it could have the function of calculating definite integrals using Simpson’s method of numerical calculation!”

Ordinary users will not know what calculus is, but for technicians like them, they have to deal with calculus almost all day long.

"Yes, it does not have the function of calculus, but it can be programmed. Whether it is integrals, complex numbers, or matrices, it can be programmed on it. The accompanying instructions include examples of programs such as Simpson's integral. You guys You can study it.”

 “Really? Great!” Sergey was very happy.

Each person was given a calculator, and as a result, the orderly work scene when they first entered here disappeared. Almost everyone was studying the calculators given to them, and their hand-cranked computers, Their slide rules were thrown aside.

Looking at this scene, Zhao Ling was very emotional.

 Choosing gifts is so important! Those senior officers all like to drink, so just provide them with fine wine. As for these technicians, what they need are advanced computing tools.

Moreover, these calculation tools cost no money and were obtained from supplies seized by customs! Qin Tao can be regarded as saving a lot of money for the navy. Of course, some of the calculators were sent directly back to the Mingzhou Shipyard. Qin Tao, who wants things under the banner of the navy and then enriches himself Behavior, no one said anything. After all, without Qin Tao, they would never have thought of giving these things.

 Now, the gifts satisfy the people here, even Popov, the person in charge here, is very satisfied.

“Nicholas, thank you for bringing the guests, they are so nice!” Popov said to Nikolai excitedly.

 “Why is my program always wrong?” Sergey suddenly shouted.

Qin Tao walked over, looked at the codes on the screen, and said, "You haven't mastered the program format yet. These statements need to be separated by colons. The calculator cannot recognize them now."

 Sergey suddenly understood.

Qin Tao glanced at the paper next to him again. It was densely filled with formulas. He couldn't help but shake his head.

 Sergey saw Qin Tao's appearance and couldn't help but ask: "What? Is there a problem?"

"Three-dimensional method." Qin Tao shook his head again, said nothing else, and walked away gently.

Looking at Qin Tao's back, Sergey was shocked. The other party was definitely an expert. He actually knew these formulas and planned to use the latest three-dimensional method to design them. However, why did the other party shake his head? Is there something wrong with my design?

“Mr. Nicholas, our leader wants to see the actual machine, is that okay?” Qin Tao asked.

"Of course it's no problem, I'll take you there." Before Nikolai could speak, Popov spoke. These guests had given them the gifts they needed most, and they were all grateful. Now, the other party's inspection request, Of course it cannot be refused.

 Actually, you can’t tell much from the actual machine, but you can see some tricks from the design room.

 However, Lao Maozi’s thinking is not like this.

China is a backward country. There is no innovation in aviation engines, and there is even less achievements in gas turbines for warships. Therefore, they don't care. I brought them to see the design room here because they want to show them off. The scale of this institute will shock these rubes.

 As for stealing lessons? What do these people know? They didn't know what it was.

Now, the atmosphere is very friendly, and the other party wants to see the prototype, of course there is nothing to refuse.

"What you are seeing now is our most advanced marine gas turbine." Leading everyone to the test area, Popov pointed to one of the large machines and said: "Its model is called GTD15000, which is an axial flow three-axis The gas turbine has a power of 20 megawatts. We started developing it in 1971 and successfully developed it in 1984. Currently, it has been equipped on many warships, including the Slava-class cruiser, and it is the pride of our Soviet Union."

Lao Maozi owns the Kirov-class nuclear-powered cruiser, but it is too expensive and they cannot afford it, so they built a scaled-down version of the conventionally powered cruiser Glorious-class. The ships produced in the later period were equipped with four GTD15000s as For acceleration power, there are two early models as cruising power, full combustion power, which is quite advanced.

At this time, everyone was looking at this prototype. It had a cylindrical front end and a cubic structure at the back. It showed Lao Maozi's rough style. Wu Shengli couldn't help but ask: "What kind of aero engine is this engine?" Improved?"

Qin Tao wanted to stop him, but it was too late. Zhao Ling quickly translated Wu Shengli's question.

Qin Tao could only put his hand on his forehead, which was embarrassing.

"No, no, our gas turbines are different from aero engines. In the 1950s, when we started to develop gas turbines, we found that Western gas turbines improved by aero engines were very inappropriate. After all, there are significant differences between the two. Therefore, we had to develop specialized gas turbines, and our design bureau was established at that time," Popov said.

Except for Lao Maozi, other countries use aero engines to improve them. Take the most famous LM2500 gas turbine, which is improved with the famous TF39 turbofan engine.

"Yes, life is the biggest problem." In order to save some face for Wu Shengli, Qin Tao could only take over the topic and said.

 Other countries can change it, but Lao Maozi can't because their engine life is too short! Even the Su-27 I saw a few days ago uses an AL-31F engine with a lifespan of only three hundred hours. If it is used on a warship, the engine will need to be overhauled before it goes very far.

"Yes, this is one problem, and there are other problems. In short, we are taking the path of specialized research and development." Popov said: "We also have to consider the needs of the navy, for example, in order to withstand underwater explosions , bombs, or torpedoes, the design of our gas turbine can withstand 41G of explosive vibration impact, which is the highest impact resistance of current naval gas turbines. How much explosion vibration impact can the LM2500 you imported from the United States withstand?"

The people present were unable to answer the other party's rhetorical question. After all, the people who came were mainly leaders and their assistants, etc. They were originally here to make soy sauce, and they did not have much technical knowledge reserves.

"American gas turbines can only withstand a 15G explosion impact." Qin Tao answered immediately. He couldn't let these people be stumped.

 LM2500 is improved from a jet engine. A jet may disintegrate if it exceeds an overload of 10G. A vibration of 15G is enough, but as a power source for the navy, it is obviously not enough.

Hearing what Qin Tao said, Popov showed a proud smile on his face. Just before he showed off, Qin Tao continued: "However, American gas turbines are installed on a special base. This base can withstand an impact of 200G."

It is obviously unrealistic to rely on the gas turbine itself to withstand the shock wave. Therefore, the Americans simply use a special base to solve the problem, so that the needs of warships can be met.

 The smile on Popov’s face froze.

“Well, it’s getting late, Popov, is it time for dinner in your canteen?” Nikolay said.

Nicholas brought guests from the East, so of course he couldn't neglect it. After this inspection, the whole afternoon was over. Then, of course, it was time to continue eating and drinking.

 “Yes, everyone come with me.” Popov said.

The crowd continued to move forward. When they came to a certain dusty machine, Qin Tao glanced at it and said, "Do you want to sell these pieces of junk?"

PS: The last chapter has 4,000 words, and this chapter has 5,000 words. They are both big chapters. They are dedicated to everyone. Please subscribe, reward, and vote!

　　

 (End of this chapter)