"A turbofan engine is a gas turbine engine in which the gas ejected from the nozzle and the air discharged from the fan work together to produce a reaction thrust." He Manman tried hard to think about the information in his mind, then paused and said: "According to the information, it should be composed of a compressor, a combustion chamber, a high-pressure turbine, a low-pressure turbine and an exhaust system. ”

"That's right!" Zheng Xiaojun nodded, it seems that although there have been no experiments these days, He Manman has not let go of his study of the engine.

"What else?" Zheng Xiaojun had the heart to test He Manman again, so he asked again.

He Manman heard this, thought about it and said: "I read the literature that in the 40s, the company in country Y began to study turbine engines in order to improve the thrust of the engine, and finally succeeded in developing it in 59 years, this company adopted the overall structure of the double-rotor front fan, the channel ratio is 0.3, the thrust-to-weight ratio is 3.83, the maximum thrust of the ground bench is 7945 kg, the high-altitude cruising thrust is 2905 kg, the fuel consumption of the maximum thrust is 0.735 kg/h/kg, and the total booster ratio of the compressor is 14, The total boost ratio of the fan is 1.90. ”

"And for the first time, the company has also used air-cooled turbine blades." He Manman thought about it and said.

"Are there any others?" Zheng Xiaojun asked again.

"I don't know the rest." He Manman shook his head and said, after all, the information Zheng Xiaojun gave her is already relatively leading in China, and as for the rest, I'm afraid they haven't released it yet.

When Zheng Xiaojun heard this, he couldn't help but nodded, and then said: "Our Huaguo's aerospace engine started from imitating the turbojet engine of the Soviet Union, and it was not until 56 years that Huaguo produced the first domestic jet aircraft, and it was not until 63 years that we began to study turbine engines. ”

"In the past 20 years, we have studied two turbofan engines, turbofan-5 and turbofan-6, but they were finally interrupted for some reasons." When Zheng Xiaojun said this, he couldn't help but sigh, and then was silent for a long time.

Then Zheng Xiaojun spoke: "The project we are going to carry out this time is to go to the base to participate in the development of turbine series engines. ”

This kind of large-scale project can be as short as a few years or as many as decades, and at her current level, it is not enough to play soy sauce.

"Mr. Zheng, if I participate in the project, how will my studies at BGI be?" He Manman said, pausing again, "And I don't think my current knowledge reserves are qualified to participate in such a major project." ”

"It's good that you can recognize your own shortcomings, and scientific research must guard against arrogance and rashness, and you must be calm, and you have achieved this point."

Zheng Xiaojun nodded, looked at He Manman's nervous appearance, couldn't help but smile, and said, "Okay, I didn't really let you enter the project team." ”

"Huh?" He Manman was a little puzzled when he heard this.

"In the last engine development and exchange, you made a great contribution, so I took it upon myself to apply for your credit to go to the space base for a long experience, you shouldn't blame me for being nosy, right?" Zheng Xiaojun looked at He Manman with a smile.

"How can this be? Thank you so much, Mr. Zheng! When He Manman heard this, he looked at Zheng Xiaojun very gratefully.

"If you thank me, study hard, strive to study something good in the future, and let the teacher and me have a long face!" Zheng Xiaojun said with a smile.

"Definitely!" He Manman nodded firmly.

"Okay, let's go out quickly, otherwise that stinky boy in Xu Qingzhou will complain about me in a while!" Zheng Xiaojun said again.

"Remember to go back and pack your things and wait for me in the lab at nine o'clock tomorrow morning." Zheng Xiaojun said, and told him with some anxiety: "Remember this matter, don't tell anyone, this is stipulated in the confidentiality agreement." ”

"Okay." He Manman nodded solemnly, and then walked towards the outside of the laboratory.

And when she got out of the laboratory, she saw Xu Qingzhou take a book from nowhere and sit on a bench on the boulevard in front of the laboratory and read.

"It's all over?" Hearing He Manman's footsteps, Xu Qingzhou raised his head and looked at her.

"Hmm." He Manman nodded, but he didn't know what to say to Xu Qingzhou.

"You don't have to tell me anything, I understand, non-disclosure agreement." Xu Qingzhou looked at He Manman's entangled expression, hooked the corners of his mouth, and said.

When He Manman heard this, his eyes couldn't help but be full of surprise, he knew that Xu Qingzhou shouldn't be a god, right?

"Okay, let's go, go to me, and make you a good practice today!" Xu Qingzhou smiled, closed the book, and then rubbed He Manman's hair.

And when He Manman was still thinking about why Xu Qingzhou knew that she had signed a confidentiality agreement, and why she knew that she was about to leave Huada, when he raised his eyes again, he found that she was already sitting on a rattan chair in Xu Qingzhou's courtyard.

"Well, let's eat some jujube paste cake to cushion my stomach." Before he could react, he saw a piece of crisp white pastry stuffed into He Manman's mouth.

He Manman took a bite gently, the skin was soft, the jujube paste inside was soft and glutinous but not sweet, with the sweetness of red dates, very delicious.

He Manman's eyes lit up, and even those eyes completed a pair of crescent moons.

"Xu Qingzhou, did you do this?" He Manman looked at the delicate plum blossom-like jujube pastry on the plate, and asked in some surprise.

"Or do you think it fell from the sky?" Xu Qingzhou raised his eyebrows and looked at her.

Well, she shouldn't talk to Xu Qingzhou, if she talks to him more, her life will be shortened by anger for a few years!

He Manman thought so, picked up a piece of jujube pastry and bit it angrily.

Seeing this, Xu Qingzhou smiled and rubbed the top of her hair, and then walked towards the kitchen.

It didn't take long for a large table of dishes full of color and fragrance to be brought out by Xu Qingzhou one by one.

He Manman was dazzled, couldn't help blinking, and said, "With so many dishes, can we finish eating?" ”

"Finish eating." The corners of Xu Qingzhou's mouth hooked, and he said meaningfully.

It wasn't long before I heard a knock on the door.

Who will it be now? He Manman blinked a little puzzled, and then heard Xu Qingzhou raise his eyebrows and say, "Don't go and open the door for your Senior Brother Qin." ”

"Senior Brother Qin?" He Manman looked at Xu Qingzhou with some surprise, then stood up and walked towards the door.

And when he opened the door, he saw that in addition to Qin Zhuang, there were actually other people.

"Teacher Zheng, Professor Shen, why are you here too?" He Manman looked at the two middle-aged people with a smile on their faces with some surprise.