Xinghai Group, headquarters base.

There was a car parked on the side of the road nearby, with two yellow-skinned middle-aged men in the car.

The car is rented and changed every day.

These two people are not from the Hua Kingdom, but from the Han Kingdom, but they are intelligence personnel from the Chou Kingdom.

These two intelligence officers did not wander here accidentally, they came to monitor the intelligence activities at the Xinghai Group headquarters base.

A roaring sound woke the two of them up, and they immediately looked warily towards the direction from which the sound came.

They know that Xinghai Group has been developing new technologies and has tricked the relevant departments of the Ugly State many times. Therefore, the headquarters sent them to collect intelligence so that the Ugly State can better deal with this situation.

"Hey, brother, listen to this sound."

Generally speaking, when the afterburning turbofan engine is tested with afterburner turned on, the noise can reach over 120 decibels or even over 140 decibels. This sound level is equivalent to the noise level during rocket launch, which is very noisy.

In order to reduce the impact of noise on the surrounding environment and workers, various measures are usually taken, such as installing sound insulation equipment inside the test room.

Xinghai Group's 02J engine is too big. Even if it is well designed, the noise is still very high. It is still transmitted from the test site, and people within one kilometer of the laboratory can still hear it if they listen carefully.

"Well, yes, after waiting for so long, I finally heard some movement. What is the Xinghai Group doing? There is such a big movement!"

"Listen to this sound, maybe they are testing a new aircraft engine. Generally speaking, the sound is not that loud. Judging from the direction of the sound source, it comes from within the third base of Xinghai Group. This workshop, according to the information we have obtained, is an aviation

Engine Laboratory.”

"That's right. Let's report it to the superiors. After guarding it for so long, we finally have some useful information."

The two communicated silently and recorded the information at the same time.

There are strict protective measures around the Xinghai Group headquarters base, and the security force is very strong. It is very difficult to get close to the base. They usually can only conduct analysis by observing passing vehicles.

Sometimes, they pretended to be tourists and asked employees of Xinghai Group for some information, but the employees of Xinghai Group were very vigilant and could not get any information.

They also followed an employee of the Xinghai Group and rented a house opposite the room where he lived as a neighbor in an attempt to build a relationship. However, before they could get the information, they moved to the employee's residence of the Xinghai Group, leaving both of them in vain.

thought.

However, they changed their goals and finally became "neighbors" of Xinghai Group employees. They set up a trap to hold several gatherings, got each other drunk and obtained some information.

It’s getting harder and harder to find targets now. Xinghai Group’s employees either live in dormitories or new residences. It’s impossible for them to sneak in, let alone the Xinghai Group’s employee system. The risk is too great.

He squeezed himself into the cell.

I heard that many colleagues were discovered.

Nowadays, Xinghai Group rarely recruits social workers. Social recruitment requires investigation of work background and primary and secondary school experience. Maybe they can forge academic qualifications and work experience, but some things cannot be forged, so they can only give up the method of sneaking into the employee system. The other is Xinghai

The group's confidentiality system is very good.

A few minutes later,

The two drove away from the scene, returned to their place of residence, and reported the information collected this time to their superiors.

In addition to these two people, many people heard the sound of Xinghai Group's engine testing.

It was reported in the media that night: "Xinghai Group conducted a mysterious test, and a huge roaring sound came from the base. It sounded like an aero-engine test. It is possible that a new aero-engine is being developed, and it may have been successfully developed."

The next day, when Mu Yang went to work at the company, the public relations department reported the matter to him.

Mu Yang took one look at it, disapproved of it, and asked the public relations department to ignore it and let the outside world guess as they pleased.

After a while, the engine test will be carried out, and there is no way to hide it unless another layer of soundproof room is added, which would be too troublesome.

When the ground-effect aircraft was tested, it was so big that there was no way to hide it during the test.

A few days later, Han Li reported to him the reason why the afterburner temperature in the engine ignition test was too high:

"Chairman, the problem has been found. The temperature of the afterburner rises too fast. The high-temperature resistant coating is not enough to withstand high temperatures above 1700°C. The coating thickness of 02J is already much thicker than that of 01J. If it is thicker, it may

It’s cracked. Apart from that, we have no good solution unless we have better high-temperature resistant coating technology.”

Mu Yang thought for a moment and asked: "How many afterburners do we still have without spray coating?"

"There are three more. We have developed a total of five engines for testing."

"Okay, I'll think of a solution, and you guys should try a little more to see if there's a good solution."

"OK."

Han Li nodded respectfully. He planned to go back and hold another special meeting to jointly tackle this technical problem.

The engine structure cannot move, and it has to be redesigned if it moves. Moreover, the engine structure is already very reasonable, and the current problem is not in the structure;

The cooling system cannot be moved. Metal 3D additive technology is used to create a hollow structure. The cooling system has been upgraded by several levels, otherwise it will heat up faster.

Sad!

Han Li looked worried and exited the chairman's office.

After Han Li left, Mu Yang looked for high-temperature coating technology from the system store.

There are many types of technologies, such as thermal barrier coating (TBC), alumina coating, anti-corrosion pit coating, ceramic coating, fluorocarbon coating, silicon carbide coating, etc.

Like the afterburner, the engine vibrates greatly when it is working, so it is not suitable to use ceramic coating because it is too brittle.

At present, the company's engines use nickel-based high-temperature alloy coating technology, which has good toughness, but it cannot be coated too thickly. The high temperature resistance is limited and can withstand temperatures up to 1780°C.

This high temperature resistance is very powerful. Generally speaking, common high temperature resistant coatings can withstand high temperatures of about 1000°C. Coatings that can withstand high temperatures above 1500°C are relatively rare.

For example, silicon carbide coating can resist high temperatures up to 1600°C, and molybdenum coating can resist high temperatures up to 1700°C.

Muyang looked at the current situation of the company for two hours and found a coating technology, molybdenum-tungsten coating technology. Its toughness is slightly worse than that of nickel-based high-temperature alloys, but its high temperature resistance can reach the terrifying high temperature of 2000°C.

In addition, there is no coating material with higher temperature resistance.

Mu Yang believes that even if the reading system is upgraded to level 8, this high-temperature-resistant material will not make a big breakthrough unless new high-temperature-resistant elements are incorporated.

In other words, there is a special cooling technology.

"Even if this material can withstand high temperatures of 2,000 degrees Celsius, its toughness has decreased and it is easy to crack, which is worrisome!"

Mu Yang sighed, it is not enough that the temperature-resistant coating can withstand the temperature. The afterburner not only has high temperature, but also high pressure, and the working conditions are very complex, so the toughness of the coating is very high.

The company's rocket engines also use the same coating material. Experiments have found cracking in the coating. If it is replaced with a slightly inferior molybdenum and tungsten coating, the temperature resistance may be achieved, but the service life will be reduced a lot.

He carefully thought about it for a while and felt that using molybdenum and tungsten coating technology was still too risky.

"Hey, why don't I think of a solution through cooling technology?"

Suddenly, Mu Yang thought of another plan.

The structural material of the combustion chamber is hollow, allowing cooling air or coolant to pass through. His inertial thinking is to solve the problem from the high-temperature resistant coating, but he has never thought of finding a solution from the cooling liquid or gas.

If there is a cooling gas or cooling liquid that has a good cooling effect, the original coating plan does not need to be replaced.

"Look, we've hit a dead end."

Mu Yang patted his forehead. Even without using the reading system, he quickly thought of fully synthetic liquid metal, helium-3, liquid helium, etc.

The cooling gas currently used in the engine hollow is inert gas nitrogen, which can be used for circulating cooling.

But something better than nitrogen, such as helium-3, or liquid helium with a higher concentration.

At the same concentration, helium-3 has a better cooling effect than helium gas.

Even the cooling effect of helium-3 gas is better than that of liquid helium.

If it is liquid helium-3, the refrigeration capacity is even stronger.

Helium-3, also known as 3He, is an isotope of helium and a rare gas that is widely used in nuclear physics, low-temperature physics, superconductivity and other fields.

Because it is a superfluid, it can flow without internal resistance and has extremely high heat transfer efficiency.

Therefore, in low-temperature experiments, using helium-3 can achieve lower temperatures and higher refrigeration capabilities.

However, helium-3 is a radioactive isotope that is more difficult to prepare and store, requires a higher level of technology and special safety measures, so it has very few applications.

These factors have made helium-3 very expensive, and generally only a few laboratories and research institutions can afford it.

According to international market conditions, the price of liquid helium-3 per liter is usually more than one thousand US dollars. The problem is that it is not available, so sometimes the actual price is outrageous.

In terms of liquid metal, it is not suitable for the 02J engine because the hollow holes are smaller and have poor fluidity and poor cooling effect.

Mu Yang looked at the reading system store and directly searched for cooling gas.

Sure enough, there is helium-3 development technology, and the technology introduction is better than other cooling gases.

Soon, he found a technology that made helium-3 easier to manufacture and more convenient to store.

Achievement point requirements: 50 points!

There weren't many achievement points required, so I bought it without much hesitation.

After absorbing the technology, Mu Yang found that the structure of the equipment was not that complicated, and the main manufacturing materials and quality requirements were stricter.

Time was a bit urgent, so Mu Yang directly presented the information and handed it over to the relevant departments of the company, asking them to quickly develop and produce it. If it was quick, it could be completed in more than ten days.

The company has materials and spare parts, as well as metal 3D additive technology, and already has rapid manufacturing capabilities.

If you switch to a general machinery company, you may not be able to develop it within half a year.

At the same time, Mu Yang told Han Li the solution, asked him to keep an eye on the manufacturing of helium-3 equipment, and told him some safety points.
To be continued...