Back in 1978, I was admitted to Northwestern Polytechnical University.

Chapter 46: There's still room for improvement in these turbine blades.

Seeing Qin Liang's slightly displeased expression, the female students below immediately realized: Qin Liang had misunderstood!

So she quickly added, "That's right. Someone as talented as you, if you've never been abroad, could take advantage of the current favorable national policies to go out and see the Western world. After you come back, you can better contribute to the development of our motherland!"

That's it?

In June of this year, the former leader issued an instruction: not only should we send students abroad, but we should send them in the thousands! We must do everything possible to accelerate the pace and broaden our path!

Under these guidelines, the first group of 25 students went to the UK this July. This is just the beginning. More and more students will continue to travel to the West to learn advanced Western technologies, and then…

Then quite a few stayed in the West!
"Yes, you're right!" Qin Liang nodded. "If possible, we should go out and see the Western world. But I think the last sentence is more important: we must come back. Studying abroad is for the purpose of returning to build our motherland!"

As for myself? I have no intention of going abroad at all. The advanced technology is all in my own mind. Going abroad? There's no need for that!

But... this girl just wanted to remind herself that national policy allows her to go out and see the world? If that's the case... then that's a bit too much...

"Qin Liang, I've read your Northwestern Polytechnical University's paper. I'd like to ask, is this stealth technology really that important?" At this moment, another student stood up and asked.

The girl sat down and continued to look at Qin Liang with a smile. Qin Liang also pulled himself out of his thoughts and continued to answer the question: "Of course. When the Americans came to our Northwestern Polytechnical University for a discussion, I guessed that they must also be researching similar technologies. Ten years from now, it may be the era of stealth aircraft!"

For now, let's be prophets. When these people look back on ten years ago, they'll be filled with emotion: "That Qin Liang was amazing! All his predictions came true!"
"Qin Liang..."

Since they were all in the same major, they naturally had many questions. Qin Liang, a freshman, was able to answer the questions posed by the graduate students fluently, which earned him great respect from the students.

Time flies, and two hours have passed.

"Dear students, that concludes today's discussion. If you have any further questions, please write to Qin Liang..."

Qin Liang was indeed tired. He walked off the stage with several teachers. Just then, the female student suddenly ran up quickly and handed Qin Liang an envelope.

"Wow!"

No matter the era, people love gossip, and someone immediately shouted it out.

"love letter!"

Qin Liang was also stunned. This... couldn't be, right? He hadn't seen the female student writing anything down there! Had she written it beforehand? What a playboy! Besides, the envelope felt really thick!

"This classmate..."

"Qin Liang, take this, you'll need it later! Oh, and open it when you get back!"

What does that mean? If it's a love letter, is it for someone else, something we'll need later? "Qin Liang, let's go to the conference room and rest," Professor Yu said.

"Yes, Professor Ning said there's another gift for me." Qin Liang looked at Professor Ning, thinking, "You promised, so don't go back on your word!"

"That's natural!"

meeting room.

Qin Liang sat on a chair with its armrests worn smooth, holding a water cup in his hand, blowing on the tea and drinking the water.

Boom!
The door opened, and Professor Ning walked in carrying a small box: "Here, Qin Liang, this is our gift for you!"

The box was opened, revealing a sponge inside. Opening the sponge revealed a shiny object, about twenty centimeters long and six or seven centimeters wide, with a curved surface and a cross-section resembling a large cleaver on the side, covered with many air holes.

"This is……"

"High-temperature air-cooled turbine blades! Using them can raise the temperature the turbine can withstand by 100 degrees Celsius!" Professor Ning said, "Our Aero-engine Teaching and Research Section of the Capital Institute of Aeronautics and Astronautics, in conjunction with the Department of Materials Science and Engineering, tried tens of thousands of times and finally perfected this type of blade... You know so much, you should know what it means, right?"

"For every 100-degree increase in turbine inlet temperature, engine thrust can increase by 20%," Qin Liang replied.

“That’s right!” Professor Ning nodded. “Your Super-7 project is very good. It can achieve 80% of the performance of the F-16. However… I think there are prerequisites. If the engine thrust is insufficient, the aircraft’s maneuverability will be greatly affected. At that time, I thought of contributing our research results…”

Qin Liang's expression was complicated.

"Currently, the turbine of the domestic WP-7 turbojet engine uses GH220 solid forged blades, with an inlet temperature of only 970 degrees Celsius. Domestic related units have developed nine-hole hollow blades, which can withstand temperatures of only 1015 degrees Celsius. With our multi-hole hollow blades, the temperature can reach at least 1070 degrees Celsius. Even if the engine thrust is increased by 10%, it can be increased to more than six tons!"

Professor Ning exclaimed excitedly, "This way, the Super 7's performance will be even stronger! Qin Liang, Qin Liang, are you scared? Huh, why are you shaking your head?"

It's only around 1,000 degrees Celsius, what's so great about that? At the same time, the Americans' F-110 already had a turbine inlet temperature of over 1,400 degrees Celsius! And the later American F-119 even reached 1,700 degrees Celsius!
For the Super 7, six tons of thrust is not enough; it needs to be seven tons!

Qin Liang had a lot of technical knowledge in his mind, which he originally planned to pass on to the Materials Science Department of Northwestern Polytechnical University. But now, seeing Professor Ning's expectant eyes and bright, spirited gaze...

"Qin Liang? You're not satisfied with Professor Ning's technology? Well, I can't blame you. After all, everyone has their own expertise. You probably haven't studied aero engines and don't know how difficult it is. Before Professor Ning returned to the capital to teach, he worked with Professor Shi on turbine blades..." A teacher explained from the side.

Back then, the WP-7 turbojet engine, developed by introducing technology from the Russians, had solid blades. When developing the J-8 fighter jet domestically, it was necessary to improve the engine technology. At that time, the team led by Master Shi developed the nine-hole hollow blade technology, which successfully improved the engine's thrust.

And Master Shi is a master-level figure in high-temperature alloy materials in China!
Qin Liang might be able to talk fluently about some areas of aircraft development, but he knew nothing about the engine field! Increasing the number of air vents from nine to dozens was no easy feat!
"Yes, I don't really understand it. But I think that if we're going to make a hole, there will be some air leakage. The further out you go, the less air there will be. Won't that cause uneven heating?"

(End of this chapter)