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Latest URL: April 20th is a very important day for Xinghai Group.

Today, the XH-AN05-01 aero-engine will undergo an ignition test, which represents a big step forward for this project. It was planned to start the ignition at ten o'clock, and Mu Yang arrived at the experiment site at nine thirty, and Zhou Chen came with him.

Zhou Chen saw that the chairman's face was very calm. In fact, he knew that the chairman was very concerned about this ignition test. With so many projects in the group, he rarely went to see the prototype test.

Zhou Chen said: "Chairman, we have prepared for more than a year, and then made a prototype, which is very efficient."

"Yes, the project was officially launched in June last year, but the formation of the project team started at the beginning of the year. The actual development time was almost a year and a half, and the efficiency is indeed very high." Mu Yang said, this is the cheating In terms of efficiency, others have been working on it for several years, or even more than ten years, but it took Xinghai Group more than a year to produce a prototype.

According to the technology of the system store, as long as it is manufactured according to the original technology, there is not much modification, and the probability of success is very high. However, Mu Yang is still a little uneasy, mainly because he cares too much about the success or failure this time.

If it is successful, he can use this as a basis to develop the XH-AN05-01J engine for the king, and the efficiency will be very fast. Maybe it will take a few more months to produce a prototype of the engine for the king.

As long as the king engine XH-AN05-01J is developed, there will be many types of fighter jets powered by it.

Even if there is no king-use engine, Xinghai Group can still rely on civilian engines to build a super-large transport aircraft for civilian use, which has a better carrying capacity than the An-225, or it can be used to manufacture ground-effect aircraft.

The ground effect aircraft is much more than the An 225 Ke Niu Cha, which is the next step of Muyang's aviation development plan.

Turning back to the topic, Xinghai Group currently has two engine ignition test sites, called No. 1 and No. 2 ignition test workshops, and the tests do not interfere with each other at the same time.

At this time, two XH-AN05-01 have been fixed on the test device. This test is called a static ignition test, which is not much different from the rocket ignition test, except that the aeroengine is placed horizontally, while the rocket is placed vertically.

Static ignition test, through different test devices, such as structural test stand, high-precision test stand and centrifugal overload test stand, the engine is fixed on the engine test stand body, the engine is ignited, and the parameters such as thrust, pressure, temperature and strain of the engine are obtained , the engine is at rest relative to the test bench during the entire ignition process.

Seeing the chairman and Zhou Chen approaching, Han Li stepped forward and said, "Boss, Mr. Zhou is good. Two engines ready for testing have been prepared, and 60 tons of aviation kerosene is also ready, which is enough for three engines to continue testing for ten years." Hours, the ignition test can be carried out at any time.”

Aeroengines consume a lot of fuel, and the fuel tank of a medium-sized civil aviation aircraft weighs about 20 tons when the fuel tank is full.

At present, in January 2015, the import duty-paid price of aviation kerosene is 4,795 yuan per ton. The Airbus A320NEO aircraft is a medium-sized mainline aircraft with a standard 150 seats and a total of two engines. Generally, when there are 180 people, it is based on its cruising speed. 850 kilometers per hour, the fuel consumption per hour is about 2.87 tons, about 13,700 yuan, and the fuel cost is 30,000 to 40,000 yuan per flight for more than two hours.

C919 is about 2.5 tons per hour, and 737NG is about 2.6 to 2.8 tons per hour.

But fuel economy is not calculated in this way. After all, the number of people carried is different, and the cruising speed is also different. It is unreasonable to compare the fuel economy of aircraft.

In conversion, in the case of 18 tons of heavy fuel oil and a full load of people, the fuel cost of the Airbus A320NEO aircraft is 0.0162kg/person/km, that is, an average of 0.0162kg per person per kilometer, and a full load of 180 people is 2.916kg/km.

The fuel cost of C919 is 0.0187kg/person/km, and that of Boyin 737-800 is about 0.0215kg/person/km.

The fuel economy of the aero-engine developed by Xinghai Group is better. Under the same load and the same cruising speed, the theoretical fuel economy is about 0.0140kg/person/km, which also means that using the same

More fuel, longer cruising range.

"Okay, I'll take a look at the scene."

Mu Yang nodded, and went to the venue with Han Li to check again. After finding nothing wrong, he left the venue.

During the ignition test, the scene is not safe, people are easily drawn by the fan, and the temperature at the tail of the engine is extremely high, and the combustion chamber may explode.

Therefore, during the ignition test, the site is closed, and personnel can observe through the tempered glass window or real-time video. Mu Yang and others left the scene, closed the door, and came to the experimental observation window far away from the engine.

Today, hundreds of aero-engine researchers have come to the site to observe the ignition test. They have worked hard for more than a year and put in a lot of sweat. They all look forward to the success of the ignition test.

Success or failure, just today. "Check Sites 1 and 2!"

Han Li shouted loudly that the scientific research personnel in charge of the on-site inspection observed with the naked eye that there were no people at the scene, and no life was found in the test equipment. At the same time, the experiment door was closed.

"Report, No. 1 site is safe and can be tested." "Report, No. 2 site is safe and can be tested." Two scientific researchers reported loudly.

"Start Test No. 1 first!"

Following Mu Yang's order, the tester turned on the control system and cooling system, and after seeing a series of instruments and display lights showing normal, he took another look at Mu Yang and reported that everything was normal, and he could proceed to the next step.

Mu Yang nodded, and shouted flatly: "No. 1 starts! 10% power operation."

As the tester pressed the start button, there was no exhaust at the end of the engine.

There is no tail flame when the aero-engine is not boosted, and the gas ejected at this time is colorless and transparent. Civil aviation engines do not have afterburners, so there is no tail flame.

You can see a clear tail flame when you use the engine to increase power. The color of the tail flame is mainly related to the combustion efficiency. When the combustion efficiency is low, the tail flame tends to be reddish-yellow. When the combustion efficiency is high, the tail flame may appear blue-purple.

Although there is no tail flame, the dynamics on the scene can be seen, and the sound of the engine running can also be heard, and the thrust gauge also shows the magnitude of the thrust.

"Report, thrust 16300N, normal operation!"

After about half a minute, the tester reported that he was a little excited. Mu Yang's face is still calm, this does not count as a successful ignition.

"Maintain for three minutes, record the data, increase the power by 10% each time after there is no abnormality, and maintain it for ten minutes after reaching 100% power."

Mu Yang gave the order. "receive!"

Everyone at the scene was clenching their fists, hoping that the test would pass.

The power of the No. 1 engine is getting bigger and bigger, and the running sound is getting louder, and the on-site scientific researchers are busy recording data.

About half an hour later, the No. 1 engine was operating normally, and the thrust gauge showed that the thrust had reached 142,230N, equivalent to 14.5 tons, and it was only at 90% power at this time.

"Full power test!" "Maintain for ten minutes."

Following Mu Yang's order, the No. 1 engine made a roaring sound, and the instrument display was normal. "Report, the thrust is 155,000N, the fluctuation range is plus or minus 200N, and the operation is normal!"

The thrust fluctuation is less than 0.5%, indicating that the combustion is relatively stable and the system is controlled more precisely. This data is considered excellent.

Mu Yang's expression is still calm. Of course, running at full power is not a success, but it is already a big step forward. Normally, the test power must reach 120% of the design power, and it can be considered successful if it can maintain operation for two hours. In actual use, it is not allowed to exceed full power operation. If it exceeds, there will be a prompt, and if it is larger, it will alarm. After a few minutes, the testers report on thrust, deformation, temperature of key components, and especially temperature.

At present, the maximum temperature of the combustion chamber is far below the allowable maximum range, and Xinghai Group's unique blade cooling system has played a role.

Ten minutes later, Mu Yang ordered again: "Run at 105% power for 10 minutes! Every ten minutes, gradually increase by 5%, up to 120%."

Now, everyone is even more nervous.

Everyone is nervous the first time, and that's normal. At this time, Mu Yang was also a little nervous.

105%, normal! 110%, also normal!

Up to 120%, the sound of the engine became louder, the thrust gauge had already shown 19 tons, and the temperature also rose rapidly.

But everything, appears normal.

"Chairman, do you want to increase the power and test the maximum power?" Han Li saw that the instrument display was normal, especially the temperature of the key components, which was still some distance from the maximum allowable temperature. He was very excited at this time and wanted to see What is the maximum limit of the engine.

Mu Yang thought for a while, and said: "Of course, if you don't try it, how will you know its limit. However, this one will keep running for two hours honestly, let's try it with No. 2."

"OK!"

Han Li said excitedly, and at the same time ordered the testers to start testing the No. 2 engine. half an hour later,

The test results of No. 2 engine are not much different from those of No. 1 engine, indicating that the performance is stable. For half an hour, engine No. 1 was running at 120% power, and everything was normal.

"Also gradually increase the power by 5%, and maintain it for ten minutes." Mu Yang ordered. The order was conveyed, and the testers were also nervous.

At 130% power, the thermometer has not alarmed.

But when it reaches 135% power, the temperature gauge light and the turbine speed light start to turn yellow, indicating that it is in a dangerous state. Han Li looked at the chairman: "Chairman, do you want to continue? This is a bit dangerous."

"wait a minutes!"

Mu Yang said that after about five minutes, the temperature was higher than before, but the light still showed a yellow warning line. "Continue to add, gradually increase by 2%!"

When the power reaches 140%, the siren keeps sounding, and the temperature gauge shows red, indicating that the engine is in a state of burning out at any time. Han Li was very nervous, but also very excited. At this time, the thrust had already exceeded 20 tons.

About 120 seconds later, the red light on the temperature gauge was displayed for more than a minute, and the red light was also displayed on the speed. Mu Yang knew that he could not continue to work on it. He was already on the verge of breaking down the engine. He immediately ordered: "2 Shut down immediately!"

The tester immediately tapped the emergency stop button, the engine stopped supplying oil, the fan speed dropped rapidly, and the sound became smaller and smaller until it became quiet.

Everyone's dignified faces were relieved, and they breathed a sigh of relief.

"Chairman, is this considered a success?" Zhou Chen couldn't help asking, he was observing the whole process without making a sound.

Although Zhou Chen is also a scientific researcher, he is not good at aerospace, and he doesn't know much about it, but he certainly understands it better than ordinary people. After fully managing the company, I put down the scientific research work, but I also need to understand the general situation of some large scientific research projects of the company.

Mu Yang gave a rare smile and said: "At present, I am very satisfied, but it is not successful yet, and other tests are needed. Manager Han, after the test, check No. 2 and No. 1, especially No. 2. Check to see if there are any burnt parts. It’s almost one o’clock after the No. 1 test, go get someone to bring some snacks, fill your stomach temporarily, go to eat and rest after the end, and test the No. 3 engine at three o’clock in the afternoon.”

Hearing what Mu Yang said, Zhou Chen knew that he was close, and smiled on his face: "It's really not easy."

Two days later, the basic ignition test of the three engines was completed. The tests of No. 1 and No. 2 engines were normal. When No. 2 was overloaded, the rings of the combustion chamber were burned out. When No. 3 engine was running at 120% power, the display temperature It was too high, and the test had to be stopped. During the inspection, it was found that the high-temperature-resistant coating of the combustion chamber was cracked. This was considered a manufacturing failure, and Han Li and other researchers looked very bad.

There are many reasons for cracks in the high temperature resistant coating, most of which are due to manufacturing reasons, such as too thick coating, no stress relief treatment, etc., but it may also be that the coating material is not qualified.

After Mu Yang knew about this incident, he also paid attention to it. This is a problem with a key technology. "Retrospective inspection!"

Mu Yang gave an order to eliminate the inspection one by one.

The thickness is consistent. When I asked the manufacturer, I found that there was no record of stress relief treatment, but No. 1 and No. 2 had stress relief treatment records. Ask carefully

Underneath, it was really missed.

The problem was found, and Han Li heaved a sigh of relief. He was most afraid that the coating material would not pass the test, which would cause serious trouble, which meant that the coating material needed to be replaced.

However, cracks appeared without stress relief, which also shows that the toughness of the coating material needs to be improved.

The coating of the combustion chamber is manufactured by the metal 3D additive process. The disadvantage is that it cannot be repaired if it is broken.

Fortunately, it is not a one-piece manufacturing, or the whole main body must be replaced.

One-piece manufacturing has many advantages, but the disadvantages are troublesome maintenance and high cost.

Xinghai Group’s engine blades and blade frames are integrated, with very high precision and high-speed operation, but if one blade is broken, the whole has to be replaced. Fortunately, it is made of metal 3D additives, which is more expensive. Anyway It can be replaced, but the worst thing is that it cannot be repaired.

After Mu Yang knew the cause of the problem, he explained to Han Li: "It also requires high temperature resistance, wear resistance, and toughness. At present, only this material is available, and we can only strictly follow half of every process.

There are still a few tests that have not been done, but from the current point of view, the ignition test is considered a success. It's not a good thing if everything goes too smoothly, it's not good for your growth!

Do a few more tests, you can add some destructive tests, not necessarily in accordance with the requirements of international test standards, such as when the blade is missing, bent, sundries are involved in the fan and other abnormalities, how the engine is running It is the most common problem that needs to be faced when abnormal situations occur.

At the same time, you have to continue to measure the life of the engine, don't be afraid of fuel consumption; at the same time, check how long maintenance is needed. ""Yes, we currently rely too much on you, chairman. Without you, this engine cannot be successfully developed. Our team is too young and needs to be tempered. Next, we need to thoroughly understand its technology and test more. Accumulate more experience." Han Li told the truth, and at the same time handed over the test data of the three engines to the chairman.

"Well, go get busy." Mu Yang nodded, the engine did depend on him, which is also a very helpless fact, without him, it would be impossible for this young team to make an advanced engine.

If it is possible ~www.readwn.com~, a more advanced engine will be made a long time ago. After Han Li left, Mu Yang opened the test data file.

The test results of the XH-AN05-01 aero-engine have come out, which is not much different from the theory, and the fuel economy is much better than that of other engines, which is very important for civil aviation aircraft.

When fully loaded, the thrust-to-weight ratio is greater than 8, reaching 8.51, which is beyond Mu Yang's expectation.

His original requirement only needs to be greater than 7. Now it seems that the XH-AN05-01 aero engine still has room for improvement.

The XH-AN05-01 aero engine will continue to be tested. At the same time, Mu Yang has issued an order to develop the XH-AN05-01J king-size engine, requiring a prototype before the National Day.

The development of the XH-AN05-01 aero-engine is regarded as a success. Mu Yang does not plan to tell Somfy for the time being. Let’s see the situation after all the tests are completed.

Chouguo is digging a hole for Shangfei Company, and Mu Yang is also digging a hole, so he has to keep some cards for himself.

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