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The ring tube combustion chamber is to distribute the flame cylinder of burning fuel on an annular section, the structure is relatively compact, and only need to study the combustion situation of a flame cylinder when doing engine design, and then combine it, which is less difficult for design work and processing.

However, the annular tube combustion chamber has a fatal disadvantage, that is, its flame cylinder is separate, so that the temperature is higher than elsewhere in the place where the gas of the two flame cylinders at the outlet is superimposed, so that the gas diversion blades in front of the power turbine are very dangerous, and the blade life of the high temperature is only a fraction of that elsewhere, and the annular winding combustion chamber is a good way to avoid this shortcoming.

The annular combustion chamber is not composed of multiple flame cylinders, the whole combustion chamber is a whole, the fuel is burned evenly in the entire ring, the temperature of the outlet gas field of the combustion chamber is more uniform than that of the annular tubular combustion chamber, and the fuel nozzles required for the annular combustion chamber are also less than those of the annular tube combustion chamber. A uniform temperature field has a great benefit on the overall life of the gas guide vanes that are directly subjected to high temperature gases. In addition, it can improve the combustion efficiency, the inlet temperature of the power turbine, reduce emissions and increase the engine power.

However, the difficulty in the design is much greater than that of the ring tube combustion chamber, and the combustion situation of the fuel in the whole ring is very complex, and the situation that needs to be considered in the design is dozens of times that of the ring tube combustion chamber, and the difficulty in processing is much greater than that of the ring tube type.

"Teacher, this is too difficult, and foreign countries have only broken through seven or eight years in this," Li Yuanling asked curiously.

Wu Zhonghua nodded and said: "In the 80s, a new generation of foreign engines began to use this kind of combustion chamber. As far as Spey is concerned, if the combustion chamber can be replaced with an annular one, the volume and weight of the engine will be reduced a lot. ”

"The teacher changed the combustion chamber, which is equivalent to redesigning the Spey engine. Li Yuanling said with a sigh Wu Zhonghua laughed and said: "When we want to change the Spey engine, we can change it as much as we want, so that we can say that we have completely understood Spey's technology." ”

"Xiaoling, you should focus on the familialization of turbofan blades and engines in the near future, and I'll go to Lao Tao to talk about it. ”

When Liang Yuan entered the classroom of the junior class, the class suddenly fell silent. In the days when Liang Yuan was away, the two rolls of paper about the entrance exam were already known to the whole class, and Liang Yuan disappeared without a trace after he appeared. Therefore, the classmates are curious about this maverick guy, and they have seen college skipping classes, but they have never seen teenagers skipping classes.

Ignore the curious, surprised, and disdainful gazes of the class. Liang Yuan Shi Ran came to the seat and sat down, put the schoolbag into the desk, and slowly took out the bookery and utensils.

Two figures swished along.

"Boss, you're so admirable, you're just a naked contempt for school," Seinfeld said with admiration.

"Although I know that it is impossible to cheat on the entrance exam, I still can't help but doubt, brother, you didn't copy it, I feel that the worst students in the previous class were much more diligent than you. Yu Wenjie asked out of tune, "Copy you big-headed ghost, Xiaoyuan is much stronger than your head full of numbers." Wang Meng knocked the fat man's head with a bang.

"Uh, I've been sick lately. I didn't come to class. Liang Yuan said with a smile. "My teacher and I took a leave of absence"

"Pull it down. Wang Mengmeng said with a smile, "You just talk nonsense, Teacher Fang has come to our dormitory several times to ask if we have seen you recently, and asked us if we know your contact information." ”

Liang Yuan was in school. Cunningly left Benxi's home phone number to the school.

Throughout September, Li Yuanling was either in Shengjing or at the Benxi Locomotive Factory Guest House, and Liang Jiangping did not go home at all, and Liang Yuan must have stayed at the Depot Guest House when he returned to Benxi, and Liang Jiangping occasionally stayed at the Depot Guest House when he saw Liang Yuan. Mrs. Fang called home if she could find a talent.

"I've left a family phone number for Master Fang," Liang Yuan said casually.

"Mrs. Fang, why does Xiao Yuan call Teacher Fang Mrs. Fang?" Seinfeld discovered Liang Yuan's unintentional words.

Liang Yuan patted his forehead, looking at the eager and curious eyes of the three people, Liang Yuan could only explain the origin of Master Fang.

Yu Wenjie is an idiot in other aspects besides mathematics, physics and chemistry. When Seinfeld and Wang Mengmeng saw Tianlong Babu, the two of them laughed breathlessly and said, "Xiaoyuan, I don't take you to bury people like this, Teacher Fang is very good." ”

"What do you two know, I'm prophesying," Liang Yuan said with a look of a god, and Yu Wenjie, who was confused, muttered: "The number is insufficient, and the probability cannot be calculated." The three of them looked at the fat man with a confused expression and burst into laughter.

The classrooms were pushed open, Fang Hongping appeared at the door of the classroom, and some chaotic teachers suddenly quieted down.

Yu Wenjie and Song Fei heard the silence in the classroom, and when they looked back at Fang Hongping, they shrank their necks and slipped back to their seats.

Fang Hongping looked at the classroom with satisfaction and instantly regained its calm, and suddenly felt that something was wrong, and scanned the classroom again, only to realize that the seat that had been empty for a month finally had an owner.

The fire in Fang Hongping's heart surged up, this guy was missing a month's course just after the start of school, and he actually said that he had menopausal syndrome when he took a leave, it was simply that Fang Hongping couldn't find an adjective to describe Liang Yuan's bastard Cheng dù after thinking about it for a long time.

What's even more annoying is that he reported this situation to the school, Ma Tianyuan, who is in charge of the juvenile class, after Ma Tianyuan was sloppy a few times, he simply and neatly supported himself directly to the dean, how to tell the dean about such a trivial matter as a student missing class, Fang Hongping gritted her teeth angrily.

The University of Tokyo is not without related households and bargaining students, but they are all admitted or specially recruited after taking the age-appropriate college entrance examination in this college. It's all for the diploma. What is this guy doing in front of you? You don't have to go through the back door for so long, do you?

Ma Tianyuan also said that when Fang Hongping came to find him, he called the teacher and asked about the student's situation, after all, he didn't feel at ease if he didn't come to class for a long time. has the obligation to understand the situation of the students, Liao Min knew that the equipment of the Northeast Locomotive Factory was all operated by Liang Yuan, and after asking Li Yuanling and learning that Liang Yuan had been busy with the affairs of the locomotive factory in Benxi, he directly told Ma Tianyuan to rest assured that Liang Yuan was fine and was only temporarily absent from class for a few days.

Ma Tianyuan heard what his teacher said, and remembered that when Zhu Liguo, the director of the Department of Metallurgy, went to Benxi, he specially asked him to take care of this student. Realizing that this student was not small, and he should not worry about it, he sent Fang Hongping directly to the dean's side.

Fang Hongping took a deep breath. Then he stared at Liang Yuan with his eyes, trying to overwhelm Liang Yuan in momentum, so as to facilitate future management.

Liang Yuan looked at Fang Hongping staring at him intently. His snow-white cheeks were covered with an abnormal flush, his towering breasts rose and fell rapidly, and his shirt buttons were tightened.

If you are working hard, will two buttons fall off, Liang Yuan thought obscenely, his eyes were rolling on Fang Hongping's chest and buttocks, what would be the effect of Fang Hongping's appearance in front of him if he was seen by Cai Xiaobing's scum.

In his previous life, that guy was not married like himself, foraging for food and fooling around in various night clubs and schools, and he suspected that this guy had failed to confess to his teacher. I was deeply affected by the flowers. In this life, we must figure out this problem, 34D is different, sure enough, the peaks and mountains are like gathering, the waves are like anger, and the big-breasted style can't stop .......

Fang Hongping looked at Liang Yuan and didn't care about his gaze at all. Instead, he squinted his eyes up and down and kept looking at himself, how awkward was the smile on the corner of his mouth, Fang Hongping opened his mouth and didn't call Liang Yuan out to talk after all, looking at this guy's virtue, he knew that the conversation would not play a role, just make himself angry.

Fang Hongping took a deep breath. suppressed the anger in his heart and decided to give up Liang Yuan completely.

"Wang Mengmeng, you take three classmates to my office and bring all this month's test questions" Fang Hongping said Wang Mengmeng answered, called Song Fei and Yu Wenjie, and pulled Liang Yuan up again and said, "Go, go to work." ”

A few people walked out of the corridor, and Seinfeld said with a smile: "Xiaoyuan, Bai admires you, it turns out that you asked Teacher Fang for leave." Then Teacher Fang came to us and asked what you were doing with your phone number?"

Liang Yuan just smiled and didn't answer Seinfeld's question, he also wondered how he could get through so easily, and after thinking for a long time, it could only be attributed to Master Fang's temporary lack of skill, and he had not yet achieved great success.

Liang Yuan took a morning class leisurely, and the two Loli who were excited at noon waited early downstairs in the junior class, and the junior class of the University of Tokyo enrolled more than 100 people in three classes this year, all in one building. As early as when the school started, the two Loli had waited for Liang Yuan downstairs in the juvenile class, and everyone who saw it was surprised, but it was a pity that it was like a glimpse, and then no one was seen again.

Those who have seen two Loli in casual chat on weekdays say,Such similar twins have only seen in their lives,I don't believe it if I haven't seen it.,The topic of two Loli lasted for more than ten days before it slowly disappeared.,This time the two little girls suddenly appeared again, and it was a storm on the ground.,When Liang Yuan went downstairs, there were more than 20 people around the two Lori.,I'm pointing and trying to identify the similarities and differences between the two little girls.。

This kind of scale of onlookers can be completely ignored for the two Lori, seeing Liang Yuan down, the two little girls threw over in unison and said, "Xiaoyuan, you always don't eat actively, you came down late today." Seinfeld shouted when he saw the two lolis: "Liu Chuang of 311 still doesn't believe it, I'll call him right away and ask him to come and have a look." Then he frowned and said to Liang Yuan: "Boss, you and the two sisters can talk about whether you can wait for a while, Liu Chuang will not go to the cafeteria at noon." ”

Liang Yuan looked at Seinfeld with a wry smile and shook his head and said, "Don't call me boss, now the two of them are the boss, I was just beaten by the two of them a few days ago, you can say it yourself if you are not afraid of death." ”

"Really," Seinfeld and Yu Wenjie asked suspiciously.

"Ning Wanfei is practicing karate, just the two of you multiply two for nothing" Wang Mengmeng knew the old bottom of the two loli, and said to the two of them disdainfully.

The two of them watched Liang Yuan take the lunch boxes of the two Lori, looked at each other and shrunk their necks, and followed behind them honestly.

Ning Wanjia gently pinched Liang Yuan, and said coquettishly: "Where have people beaten you?" Then he remembered something, and his little face blushed slightly.

Ning Wanfei wrinkled the tip of her pink nose and said, "I thought that the junior class could be a little more mature, it is no different from the attached elementary school, what is so strange about twins." ”

Wang Mengmeng said with a smile: "It's the first time I've seen the two of you in the Children's Palace. I'm also surprised, if Xiaoyuan can keep coming to class in the near future, I guess it will be good after a while. ”

Seinfeld and Yu Wenjie also came over, and asked Liang Yuan with a smile how to distinguish between the two loli, and the group walked to the cafeteria with a smile.

After lunch, Liang Yuan ignored Fang Hongping's fiery gaze and slept for a class as usual. After listening to a class, I waited until the school bell rang, packed up my schoolbag and went directly to the attached school to pick up the two little girls and go home. Forgot about all the duties and the like.

Talking and laughing with the two Lori, Liang Yuan returned to the 909 community, and Liang Yuan unexpectedly found that Li Yuanling was actually cooking in the kitchen and threw down his schoolbag. Liang Yuan ran to the kitchen and asked curiously, "Mom, why did you come back so early?"

Li Yuanling patted Liang Yuan's head and said with a smile: "What a spectacle, my mother is unemployed today, and she will have to rely on Xiaoyuan's salary in the future." It's not a hurry to buy food and bribe my son. ”

"Mom, did you separate the project team so quickly?" Liang Yuan asked excitedly.

After Wu Zhonghua found Tao Yonghe, he handed over the plan sorted out by Li Yuanling, and then said directly: "Old Tao, although Xiaoling speaks a little rushed, she is also right about things and not people. ”

"Since hearing that the navy has an unclear attitude towards gas turbine units, Xiaoling has been running outside for a long time and found investment. However, the other party proposed that the unit should be landed as the mother engine of industrial power generation, considering that we are an old relationship, Xiaoling made this plan, Lao Tao, how about you take a look?"

Tao Yonghe heard that Li Yuanling had found an investor again. My heart was tight, although this project was led by Wu Zhonghua, but the person in charge of the 423 factory was himself after all, if the two sides tore their faces, even if they could blame Wu Zhonghua for the failure of the development of the unit, but their time in the past few years would have been wasted. Moreover, the factory has an investment of nearly 10 million yuan, and it is basically no different from playing a non-usable unit, and it will be much more difficult to lead what project I want to lead in the future.

Tao Yonghe took the text with some apprehension, and couldn't help but think in his heart What kind of unit has such a big head, and he actually dares to invest here, could it be that there is so much money that there is no place to spend it, and he would not have quarreled with Li Yuanling if he knew it.

After opening the text, Tao Yonghe looked at it attentively, and after twenty minutes, Tao Yonghe let out a sigh of relief.

Closing the above, Tao Yonghe pondered for a moment and said: "Lao Wu, you are considered to be a successor, Xiaoling not only has a high level of scientific research, but also has a very good view of the overall situation. ”

"I don't have much to say about this article, but we are familiar with the navy, and in the past few days, I have tried to get them to put forward a strict acceptance standard for gas turbines, so that Xiaoling's change of scientific research direction is also justified.

"Although there are some skirmishes between 423 and Xiaoling's scientific research ideas, some people's level is really good, it's a pity to go back to 423 with me, and I hope Xiaoling can keep these people and continue to shine for the scientific research of gas turbines."

After Tao Yonghe added a few more points, he and Wu Zhonghua reached a consensus, and the two sides decided to wait for the navy's acceptance standards to come out before proceeding with the separation of the project team.

Liang Yuan listened to Li Yuanling's words and admired the cunning Tao Yonghe, this old guy is all-encompassing, basically plugging all the loopholes, as long as the number of generator sets developed by Li Yuanling for Lanhua next year is not too miserable, this matter will be seamless, and everyone will be happy.

"What about Grandpa Wu and Grandma Liao?" asked Liang Yuan curiously.

"They will come back in the evening, and in a few days they will split up the project team, and now they are preparing for 909."

Five days later, the Naval Armament Department proposed a relatively strict acceptance standard for gas turbine units, which stipulated that the power of the unit must reach more than 12,500 kilowatts, the first overhaul time must reach at least 360 hours, and the fuel consumption rate must be less than 300 g/kWh.

In Liang Yuan's opinion, the acceptance criteria of the navy are not strict at all, and they are already watery enough. The 360-hour overhaul means that the time for the ship to go to sea for combat cannot exceed 10 days, taking the two-ship patrol of Scarborough Shoal as an example: it takes one day for each round trip, eight days for regular patrol, and then it takes a week to return to Hong Kong to overhaul the engine, and it takes six ships a month to ensure all-weather cruise, and at this time there are only nine "large ships" of more than 1,000 tons in the South China Sea Fleet.

Looking at the Navy acceptance standards in his hand, Liang Yuan's heart was a little sour, and he understood the Navy's urgent introduction of the American LM2500 gas turbine, the overhaul time of the LM2500 series was 8,000 hours, and it was increased to more than 10,000 hours after the new century.

According to the Navy's acceptance list 909, the unit is qualified in terms of fuel consumption, and the power is only slightly worse, and there is still a 100-hour gap from the first requirement of 360 hours, only this requirement is far behind. This achievement can be regarded as an explanation of all aspects.

After the acceptance of the Navy, Li Yuanling, on behalf of the Northeast Locomotive Factory, announced the acquisition of the scientific research results of the entire project team to continue the development of civil power generation gas turbine units, and paid 8.2 million yuan and 2 million yuan to the 423 plant and the Chinese Academy of Sciences respectively for the purchase of the project team's prototype and all the materials and actual numbers.

So far, after more than half a year of operation, the state has spent billions of yuan, and most of the technology and half of the equipment of Spey Aero Engine introduced have completely fallen into Liang Yuan's control.

Liang Yuan threw down the navy's acceptance report and asked, "Mom, the project team has all the high-temperature metal formulas for Spey, right?"

Li Yuanling nodded and said: "Most of them are, and there is not much difference from aero engines, only information about the receiver, tail nozzle, afterburner, etc." ”

Those things are not important, and Liang Yuan, who has not been in three years and five years, doesn't have to think about the heavens at all.

"Mom, I want to merge the metal research part of the project team with the metallurgical laboratory, and separate the related process manufacturing part, and re-establish a real laboratory to serve the gas turbine and locomotive manufacturing at the same time. ”

Liang Yuan also intends to use the precision manufacturing of combustion turbines to forcibly improve the process manufacturing level of railway locomotives, and produce railway locomotives according to the standard of producing gas turbines, even in the future high-speed rail era. In Liang Yuan's opinion, if he can successfully establish a strict production standard, it is definitely super cost-effective to pay some extra costs for it.

Well, the arrears are about to be made up ^_^, and Ming'er will try to make up for the two changes promised a while ago.

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