Spark

The person who discovered the problem with the AL-31FN engine was naturally Chen Nian, and he used this as a bargaining chip to persuade Lin Yongming to temporarily postpone the introduction of this engine.

Of course, simply pointing out the flaws of AL-31FN will not fundamentally reverse the future development of this matter. To really achieve the best results, the key is to manufacture a truly usable and powerful self-owned engine .

And to do this, I have to make good use of the limited sources in my hand.

It is not enough to analyze according to the modules preset by the system, and it must be refined.

Thinking of this, Chen Nian spread out a blank sheet of paper and began to sort out all the key technologies needed to build an engine one by one.

Bear the brunt of the material, including fan blade material, combustion chamber material, thermal insulation coating material, bearing material and so on.

Then came the casting process, the most difficult of which was powder alloy extrusion technology, followed by electron beam welding and linear friction welding technology.

One more level, and we're in the realm of real internal structure design.

The most important part of this part is the design of the combustion chamber and the compressor, which involves many unprecedented new configurations and new designs. Even after 20 years, the design of this part has not really been disclosed.

But of course, as long as there are drawings, it is actually not difficult to copy, so this should be the easiest part of all key technologies.

You only need to put in a source point to analyze the engine structure.

After sorting out the main technical difficulties, Chen Nian began to plan his own use of the source.

He now has 1.15 source points in his hand, and the power system structure diagram needs 1 source point, which cannot be saved.

What about the others?

He thought for a moment, and began to check the sources required by each technology one by one.

Single crystal nickel-iron alloy, this problem has been solved, no longer considered.

However, the current manufacturing of single crystal nickel-iron alloys uses the process of hot isostatic pressing + sheath forging, which has a large loss in performance.

Therefore, I still need to analyze the hot isostatic pressing + extrusion + superplastic forging process, the core of which is the superplastic forming machine.

A small amount of this stuff has been introduced in China, and there is a GLEEBLE1500 in the Beiji Electric Research Institute.

But the performance is relatively unsatisfactory, so what I have to do is to analyze and optimize the performance of the superplastic forming machine in a targeted manner.

The main factors affecting the performance of the superplastic forming machine are the hydraulic electric control system and the high-pressure heating system.

Then just work hard on these two things.

Thinking of this, Chen Nian immediately wrote down two names on the paper.

GLEEBLE3500 high pressure module, GLEEBLE3500 hydraulic module.

Afterwards, he woke up the system and got the analysis source points needed by these two modules.

Each actually needs 0.2 source points!

Fuck, it's almost as expensive as the manufacturing process of a single crystal nickel-iron alloy. After all, it only cost 0.25 source points.

But there is no way, who makes this technical field almost blank in China.

Chen Nian shook his head, marked the number 0.2 after these two words, and then continued to the next step of deduction.

Alloy C flame retardant material, 0.08 point source point.

Ceramic based TBC, 0.05 points.

External channel coating, 0.01—we can make this stuff ourselves, so don't waste the source points.

The latter three materials are mainly formulation issues, and do not involve supporting equipment. Overall, the consumption at the source is not large.

To sum up to this step, the problem of material is basically solved, and then there is the problem of process.

The powder alloy extrusion forming has been solved on the material side, so only the welding problem remains.

Chen Nian has never heard of the two processes of electron beam welding and friction welding. It can even be said that he has no understanding at all, and he doesn't know what the technical difficulties are, so he can only search the Internet first. Write down the equipment on paper, and roughly look at the source requirements.

Then he was dumbfounded.

Each device requires 0.5 source points.

Isn't this pure nonsense? How can it afford it?

You still have to find someone to understand first, and start to analyze from the core technology

Chen Nian let out a long sigh of relief. He glanced at the densely packed nouns and numbers on the white paper. When they were all added up, a total of 3.4 source points were needed to create an engine.

This result made his brain jump.

How many things do you have to learn to get back so many source points?

The potential of introductory aerodynamics courses has been basically squeezed out, and further, it can only be those more complex research topics.

It seems that we still have to start with materials science.

This is a field that I am relatively unfamiliar with. In theory, the accumulation of source points will be faster.

Thinking of this, Chen Nian looked at the class schedule he had arranged and pasted on the wall according to Chen Guo's arrangement.

It just so happens that there will be a material science class the next day, so let's see the effect then.

The No. 22 project has been officially launched, and the engine project is also on the line, and the time left for myself is getting less and less

Chen Nian shook his head to get rid of the chaotic thoughts. Then, he turned on the system, selected the power module of F-22, and chose the option of "Start Analysis" without hesitation.

In an instant, a large amount of information rushed into his mind.

Severe pain came as expected, accompanied by a new understanding of this engine.

Three-stage fan, six-stage high-pressure compressor.

Intermediate bearings, high pressure rotor bearings.

Double-layer floating wall combustion chamber, tile sheet heat dissipation, and even vector nozzles.

One detail after another appeared in his mind. At this moment, all the problems that had troubled aviation people for more than ten years, even decades, were all answered.

He still remembers his previous life. After the rough structural drawing of the F119 engine was approved to be released, a large number of experts had a quarrel because of the question of "why the F119 engine has high and low pressure guides".

Some people think that under the premise of using CT counter-rotating turbine technology, the high and low voltage guides for rectification are not necessary at all, and maybe it is just a redundant design.

Some believe that since the director exists, it must have a role, but we don't know it.

There was no result in this dispute in the end. Some people suggested to consult with American scholars directly. After all, this is not a core technical issue, and it has been made public. If it is for the purpose of academic exchange, there may be a chance.

However, the academic-based consultation was pushed back with just one word—no, just one word.

"why?"

Why?

yes.

Even if it's not the core technology, don't you still don't know?

Since you don't know, why should I tell you?

No one can accuse the US of doing something wrong, and everyone just feels aggrieved.

Later, this problem ended without a problem. Out of safety considerations, the guides under CT were used in the design of WS-10 and WS-10A.

But what is it good for? !

No one really knew at the time.

And now, Chen Nian has the answer to this question.

Its function has nothing to do with rectification.

It is actually just a structural fulcrum!

The reason why it is kept is only to increase the rigidity of the fan frame.

However, WS-10 and WS-15 do not use the F119 fan blade integral molding technology. The technology is different, and it is completely useless to keep the guide.

So, in fact, this is basically a hole dug for us by the Americans!

Chen Nian sighed helplessly.

I don't know how many such pits there are.

But at least, with myself, the Huaxia people will not jump into such a pit again.