Chapter 1072 Strange fan design


Chapter 1072 Strange Fan Design

When he was reborn many years ago, Chang Haonan would also deliberately name some projects the same as in his previous life.

But as his influence on the timeline becomes more and more obvious, many models with similar positioning have completely taken a new path in technology.

In this case, inconsistent naming will become more and more common.

Therefore, Chang Haonan has no objection to the name AE1500, which is easy to understand and consistent with international practice.

And since Lan Xinzhi even came up with the name on his own initiative, he has obviously approved the plan.

After all, he actually had no other choice.

“Is there any additional process required?”

Chang Haonan asked directly.

“Well...the detailed steps are actually quite troublesome.”

Lan Xinzhi scratched his head in confusion.

Because this type of project involves financial support, it cannot be included in the support list casually.

But by inserting the turbofan 20, Chang Haonan was not taking advantage, but actually helping, just like when the Equipment Industry Department was established a few years ago.

It would be a bit too unkind if you still let people run the process in person.

“How about this, when the project is approved, a representative from our office will participate, and you can just leave all matters related to the construction of key projects to him?”

He could only tentatively suggest.

“That’s not necessary.”

Chang Haonan waved his hand:

“After all, the Aerospace Power Group still needs business guidance from the Bureau of Science and Industry, and outsiders are assigned to It’s not convenient to come inside the project, and we don’t lack one or two administrative staff.”

Lan Xinzhi was right. Instead of making these futile decisions, it’s better to bring in more people. Actual...

"Consultant Chang, what else does the entire project need support from us?"

After finishing speaking, he quickly added:

"Of course, I mean in addition to the regular Beyond the financial level, such as land use approval, or other aspects that require cooperation from other industries, as long as they are within the scope of capabilities, full cooperation will be given... It is best to see some results with clear stage significance within five years. ..."

Five years.

The meaning of this timetable is already very clear.

China's institutional adjustments will not be limited to the 2003 wave.

Lan Xinzhi obviously hopes to produce some convincing results before the next time.

But it is impossible to directly put pressure on Chang Haonan.

So I had to express my position in a roundabout way.

However, after all, he has been in charge of the Equipment Industry Department for too long, and his knowledge of the military industry has been refreshed a bit slowly.

Especially after the turbofan 10 was finalized, although China has not launched the development of a new aircraft engine model, it has accumulated a lot of experience through two international cooperation projects, the M88/SeA650 and the Trent 900.

With these accumulations, even civilian aviation products are far more complex in testing and certification than military products.

But five years is still relatively loose.

After all, Rolls-Royce’s Trent 900 took five years from project proposal to planned first flight despite several revisions to the design.

The rival engine alliance’s GP7200 plans to make its first flight in three and a half years.

No matter what, the technical difficulty of Turbofan 20 is much lower than these two models.

“This model is ready for everything, all it needs is Dongfeng.”

Chang Haonan smiled and replied:

“As long as the planned funds can be in place, the research and development cycle will be There is definitely no problem with it.”

“As for your additional support... I’ll just write it down for now and save it for when I need it later...”

...

Chang Haonan returned to the capital originally to wait for news about the reorganization of the Science and Technology Commission.

Now that the boots have landed, although what he was worried about has not happened, such a big move still kept the entire aerospace power group busy for a while.

Therefore, it was not until a week later that the specific division plan of the various departments of the Industrial and Construction Commission came out that Chang Haonan was finally able to return to Haojing.

I also saw the two men sent back by Ren Bingda.

"The model cannot be disclosed directly, but can you provide us with the necessary design parameters?"

At the briefing meeting, even Chang Haonan was a little nervous after hearing this statement.

“That’s right.”

Jin Xu, who was introducing the situation on the stage, quickly explained:

“So Mr. Ren’s speculation is that this is most likely a military model. , and the reason why they were able to provide design parameters should be that the other party took advantage of certain loopholes in their contract.”

Chang Haonan was originally prepared to accept the cooperation proposal proposed by Luo Luo, but now he is even more interested:

"For military models, do you need to introduce a permanent magnet power generation system?"

The world is in a crisis There are not many military aircraft engine models under development, and some that obviously do not meet the requirements are screened out...

The answer is almost obvious. "Then what else is there to guess...isn't it F136...or F135?"

Chang Haonan immediately sat up straight. .

"Well...we speculated this way at first, but after getting the data, we are not sure..."

Jin Xu clicked the mouse as he spoke.

The PPT then switched to the next page:

“They gave some data related to the fan, but to be honest...it doesn’t look like a typical military aircraft engine. …”

Above the curtain, a design drawing was displayed. .

It is said to be related to the fan, but in fact, only the parameters of the blade part are relatively complete.

Of course, if you just use the new non-contact magnetic bearing on the No. 1 pivot point like SeA650, then you don’t actually need more parameters.

And soon, Chang Haonan understood why the other party said that this did not look like a military aircraft engine...

"This size...if converted, the diameter is probably not Got about 1.3 meters? ”

An engineer raised his head after doing some simple calculations on paper with a rather shocked expression:

“What on earth do they want to build?”

You know, most military In order to ensure high-speed performance, aviation engines will not use particularly exaggerated bypass ratios.

Under normal circumstances, the diameter of a high-thrust aircraft engine used in fighter jets is only about 1.1 meters, while the diameter of a medium-thrust engine is reduced to about 0.9 meters.

What is the concept of placing this 1.3-meter diameter on an aircraft engine of normal proportions?

The NK32 on the bomber in Figure 160 is only about 1.45 meters.

This size is generally designed for supersonic strategic bombers with a thrust of 20 tons.

But this is the 21st century, how can anyone still choose this technical route?

However, for Chang Haonan, this is not a problem.

In order to meet the thrust requirements of the F35 "single-engine heavy-duty aircraft", which also requires vertical take-off and landing, the F135/136 did choose a larger fan size.

If he remembered correctly, it should be 1.27 meters.

Including the structure surrounding the receiver, it is indeed around 1.3 meters.

On the contrary, it further verified the guess just now.

What really concerned him was the shape of the blade.

Of course Chang Haonan had no contact with the detailed design parameters of the F135 or F136 in his previous life, but when the F35B takes off vertically, you can directly see the lift fan.

Even with the naked eye, he could tell that the blade in front of him was completely different from what he had seen in his previous life.

At the same time, Zhang Zhenhua, who was sitting next to him, also noticed something was wrong.

But not the shape.

"Mr. Chang, is this British leaf... a little too light?"

He leaned into Chang Haonan's ear and asked in a low voice:

"Although I am just estimating, but according to its size, unless it is completely hollowed out and the wall thickness is designed to be very thin, even if it uses titanium alloy, it will not be able to come up with this weight, right?"

For a moment, the entire conference room fell into silence.

“Perhaps the British gave us false data?”

Soon, someone gave a non-technical guess:

“According to my Experience, they were not so easy to talk to in the past. They dared to come up with design parameters before seeing any benefits.”

This view has gained a lot of recognition.

Haofei Group has had a cooperative relationship with Luo Luo as early as the late 1980s. It can be said that they are the group of people in China who best understand the virtues of the British.

As long as something happens, there is a high probability that you will be right to think the worst.

However, there are also different opinions:

“With Luoluo’s level, even fake data cannot have such obvious loopholes, right?”

"And there is no need for them to do this."

Zhang Zhenhua added:

"If we want us to agree with the conclusions of the investigation report, we must sign the contract. Sooner or later they will have the real data. If you feel that it is risky to take it out in advance, you can wait until the contract is signed. There is no need to come up with such a low-level fake plan..."

Everyone came and went and made speculations. It’s also getting more and more outrageous.

Naturally, there was no one, two or three in the end.

He had no choice but to turn his attention back to Chang Haonan, who was sitting in the first place.

But the latter was a little undecided at this time, so he had to give a compromise plan:

"No matter what, let's simulate the performance of this blade first..."

(End of this chapter)

Previous Details Next