bonanza

Chapter 836
"What about the new spindle and the full-authority digital control system?" Yang Dongsheng asked.

"It's going very well!" Vice President Wang said.

"Tell me where the high-pressure turbine is stuck!" Yang Dongsheng said.

This will be one of their key poaching directions during the economic crisis.

Vice President Wang organized the language a little bit, "The high-pressure turbine of the F-110 engine is about to withstand a high temperature of 1400 degrees, and the F-119 has reached 1700 degrees. Even a single crystal alloy cannot withstand such a temperature." Under the centrifugal force of high-speed rotation. We first need to redesign the cooling structure. For every 100-degree increase in the temperature before the vortex of a modern aero-engine, 70 degrees depends on cooling."

Vice President Wang looked at Yang Dongsheng and continued, "The second is to develop a new thermal barrier coating. Although the cooling can solve 70 degrees, there is still 30 degrees, which must be carried by the high-pressure turbine. Under the new conditions, the previous For zirconium-based ceramic thermal barrier coatings, the heat insulation performance drops too fast, which can no longer meet the demand, and new materials must be found. We have tested several rare earth ceramics, and the heat insulation performance, expansion coefficient, and corrosion resistance are all excellent. , The effect of the trial on the combustion chamber is also good, but it cannot be used on the high-pressure turbine. The high-pressure turbine needs to rotate at high speed at high temperature, and the toughness of ceramics is not as good as that of metal. We tried many methods, but the longest time is only four or five hours. The coating just peeled off!"

Vice President Wang spoke a little dry, took a sip from his teacup and said, "The third is to develop a new generation of single-crystal blades that are more resistant to high temperatures. New cooling systems, new thermal barrier coatings, and new single-crystal blades. The combination of the three can create an aero engine comparable to the F-119."

Yang Dongsheng pondered for a while, then raised his head and asked, "Please tell me the truth, how far behind are we now?"

Vice President Wang also thought about it carefully for a long time, and then said, "You also know that our small bypass ratio aircraft engine of the Yellow River is F-110. The core engine of this engine is designed by General Electric 60s, and it uses the second generation. The single crystal blade is the technology of the 2s. The F-80 engine was designed in the 119s and uses the third generation single crystal blade, which is the technology of the 80s. Now the United States has developed the fourth generation for the F-3 aero engine Single crystal blade."

"There are a lot of laggards!" Yang Dongsheng raised his teacup and asked, "What plans do you have?"

Vice President Wang took a deep breath and said, "Someone in the project team proposed to learn from the Japanese."

"The Japanese way?" Yang Dongsheng frowned slightly.

"The design level of the Japanese lags behind that of Europe and the United States. In order to obtain the same efficiency, higher temperatures are usually used. The Japanese method is to increase the heat resistance of single crystal blades by increasing the content of rhenium, so that the cooling system and thermal barrier Some discounts can be made on the coating, first solve the problem of whether there is any, and then gradually improve. Japan has used this method to produce the fourth-generation single-crystal composite blade, and the rhenium content reaches 6%. They are currently using this method. Develop a fifth single-crystal blade that is more resistant to high temperatures."

"Hey!" Yang Dongsheng sighed, "That's the only way for now!"

Yang Dongsheng arranged his work for the new year in an orderly manner. Due to the publicity of the Internet Public Opinion Office, his ability has also increased rapidly these days.

You can already see the situation of more than 4000 kilometers below.

The temperature here has reached more than 5000 degrees, and all substances have melted into liquids.

Surrounded by a sea of ​​nickel and iron, and moving slowly in one direction, this should be the reason for the formation of geomagnetism.

Although the temperature at this time has far exceeded the boiling point of iron and nickel, the iron and nickel did not boil due to the high pressure.

Yang Dongsheng noticed that in this ocean formed of iron and nickel, there are many structures similar to submarine hot springs.

A large amount of nickel and iron gushed out from deeper underground. Yang Dongsheng saw the gushing iron and nickel continuously tumbling and boiling.

The deeper layers are significantly hotter!

Suddenly Yang Dongsheng saw a mass of solid matter rushing up from the gushing liquid nickel and iron.

He hurriedly zoomed in on the three-dimensional map, and it was indeed solid, and its components were also nickel and iron.

Yang Dongsheng wanted to take a closer look, but the ball of nickel and iron melted quickly like ice cubes dropped into boiling water, and then merged into the surrounding "ocean".

Yang Dongsheng is a little confused, the temperature is higher in the deeper part, the same is nickel and iron, why is it solid instead?

The temperature above is lower, why does it dissolve instead?

Yang Dongsheng is really unpredictable, but the growth rate of his ability seems to have slowed down in the past two days.

He could only recruit Director Li immediately.

After listening to Yang Dongsheng's question, Director Li said, "But we have already released all the news that can be released!"

"Then make up some, and say that we have already built an aerospace plane and a quantum computer!" Yang Dongsheng said.

After more than half an hour, Yang Dongsheng's ability increased rapidly again.

As the depth increased further, he saw more solid material welling up from the subsurface.

Finally, at a place more than 5000 kilometers underground, Yang Dongsheng saw a stable solid.

This solid surface is arc-shaped, obviously a part of a huge sphere.

There are many volcano-like holes on the surface of the sphere, constantly taking away the surrounding materials.

Yang Dongsheng couldn't find an expert to consult what he saw, so he could only search the Internet for answers by himself.

Finally, in an introduction about neutron stars, I found some clues.

For a star with a small mass like the sun, nuclear fusion can only fuse to carbon, and the core can only collapse into a white dwarf.

A star with a larger mass, which can fuse to iron, will collapse into a neutron star, or even a black hole.

The surface temperature of a neutron star can be as high as hundreds of millions of degrees, but it has a solid iron shell about 1 km thick.

Most of the volume of an atom is actually occupied by electrons moving around the nucleus. The nucleus accounts for more than 99.96% of the atomic mass, but only one hundred billionth of the atomic volume.

On the surface of a neutron star, iron atoms are compressed due to the strong gravity of the star.

There is almost no room for electrons to move, and the nuclei are tightly pressed together.

Therefore, even if the temperature is as high as hundreds of millions of degrees, iron atoms still cannot move relatively, and appear as a solid macroscopically.

The hardness of the iron shell on the surface of the neutron star can reach tens of billions of times the hardness of steel on the earth, and the melting point is as high as several billion degrees.

Inside the neutron star, it is further compressed.

Electrons are crushed into protons and become neutrons.

These neutrons are again gravitationally packed together...and the iron atoms don't even exist anymore.

A neutron star is actually a whole atomic nucleus.

The pressure of the earth's core is not enough to press the iron nuclei tightly together.

But the temperature of the earth's core is only more than 6000 degrees, which is far worse than that of neutron stars.

　happy New Year!
　　Happy Chinese New Year!
　　
　
(End of this chapter)