Rebirth 2008: I Can Make Money Reading Chapter 497

Latest URL: August 31, 2015

For Xinghai Group's aero-engine project team, today is a milestone record. At nine o'clock in the morning, Mu Yang came to the engine ignition test workshop.

Han Li and hundreds of people in the project team were waiting for the chairman to arrive, and everyone was looking forward to the success of the ignition test. Success or failure, just today.

"Is the inspection complete?"

Mu Yang came to the scene, scanned the hundreds of employees with expectant faces, saw Han Li, and nodded to him.

Han Li took two steps forward and came to the chairman, respectfully said: "Chairman, the inspection is completed, you can start the ignition test at any time, please check and accept the chairman."

His tone was one-third excited, seven-point tense, and under a lot of pressure. After several months of hard work, it depends on today. Mu Yang nodded, and walked into the ignition room with Han Li to check the afterburner system, electronic system, vector system, etc.

Especially afterburner ignition is the most prone to problems, which involves afterburner fuel flow regulator, accelerator overflow valve, catalytic igniter, flow sensor and so on.

This engine adds ternary vector nozzle technology, the engine tail nozzle can swing in all directions, which is different from binary vector which can only swing up and down. Of course, it does not mean that ternary vector is better than binary, the application characteristics are just different.

A fighter jet equipped with a vector nozzle can deflect through the nozzle to change the thrust direction, thereby realizing the attitude control of the aircraft, which is also one of the technical requirements for vertical takeoff.

For aircraft that do not use thrust vectoring technology, the jet flow of the engine coincides with the axis of the aircraft. Civil aviation aircraft and fighter jets below the fourth generation do not use vector nozzles.

The pursuit of economy and cost in civil aviation aircraft is not necessary to install vector nozzles.

It is not to say that the use of vector nozzles is good. The vector nozzle increases the structural complexity of the engine, because it has to turn, which makes the thrust loss and the weight of the engine increases a lot.

The benefits are also obvious, the attitude is changeable, and the maneuverability, vertical and short-distance take-off and other technical and tactical performance of the fighter are significantly improved. Mu Yang checked for about 20 minutes and left the workshop after finding nothing wrong.

"Let's start the ignition test."

Han Li heard the chairman's order, his expression was solemn, and he shouted to the experimenters:

"Check Site 1!"

The scientific research personnel in charge of on-site testing observed with the naked eye that there were no people on the site, and no life was found in the testing equipment. At the same time, the door of the experiment was closed.

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

"start testing!"

Following Han Li's order, the testers turned on the control system and cooling system, and after seeing a series of instruments and display lights showing normal, they reported that everything was normal and could proceed to the next step.

This time the test ignition was directed by Han Li.

After Han Li glanced at the chairman, he solemnly shouted: "Ignition started! Vector horizontal angle, 10% power operation."

As the tester pressed the start button, the engine "hummed" sounded, which meant that the ignition system was operating normally, and it also meant that the first step was completed.

The first thing to test is the test situation when the vectoring nozzle is in a horizontal state. Now it is only necessary to test the ignition condition. After a few minutes, the tester reported back.

"Report, there is no abnormality in normal operation."

Han Li nodded: "Record the data, gradually increase the power!"

There is no problem with the XH-ANO5-01 engine test, and Han Li believes that there is no problem when the engine is used without afterburner.

Therefore, Han Li didn't have any excited expression on his face. Instead, he was a little apprehensive. He was really afraid that the engine would not be able to bear it after turning on the afterburner.

Even if he followed the development all the way, but no one is sure if he didn't test it out. twenty minutes later,

After the power reached 50%, there was a strong wind behind the engine, and there was a lot of noise in the whole workshop.

The available work of the engine is the kinetic energy difference between the inlet and outlet airflow, the greater the thrust, the greater the wind force behind the engine. Wind F=PA, that is, the wind pressure multiplied by the area, which is approximately equal to the thrust.

With such a large thrust as XH-AN05-01J, the pressure is very high. If the afterburner is turned on, people can be blown away more than ten meters away.

On an aircraft carrier, when the aircraft is about to take off, a deflector baffle rises about ten meters behind to block the high-temperature and high-speed gas emitted by the engine when the aircraft takes off, so as to avoid accidental injury to the rear personnel.

It has just been ignited now, and the speed is very slow, so it will not increase power.

The afterburner can only be turned on when the engine speed is greater than 80%NH.

XH-AN05-01J has a relatively large afterburner design range, from 5% to 65%, which can be adjusted by micro-control, and can also be quickly adjusted in six levels of 5%, 15%, ... 65%, which is very convenient.

The percentage here is actually the percentage of increased thrust.

The afterburner is to increase the thrust. The principle is to reheat the exhaust airflow to further accelerate the airflow and inject fuel into the afterburner to increase the combustion rate.

Of course, the afterburner is equivalent to adding a nitrogen acceleration system to a sports car, which consumes a lot of fuel.

Therefore, generally only in special cases such as take-off, landing, and acceleration, fighter jets will use afterburner.

Like the F-14A fighter jet, the maximum internal fuel volume is about 7348 kg. If the full afterburner is turned on, the fuel consumption is about 907 kg per minute, and all the fuel can be consumed in 8 to 10 minutes.

Moreover, it is easy to burn the engine if it is turned on for a long time.

Even if the fuel economy of the XH-AN05-01J engine designed by Muyang is good, if the full afterburner is turned on, it will run out in ten minutes.

But if you only turn on a small part of the afterburner, such as 30% afterburner, it can reach half an hour, but you can't continue to open it, otherwise it is easy to beak the engine.

At this time, the XH-ANO5-01J engine gradually increased its speed and power, and the noise in the workshop and the wind speed behind the engine also increased.

Every 10%, the researchers recorded the experimental data and checked whether there were any abnormalities in various instruments and equipment. "Report, thrust 144KN, normal operation!"

When the power is turned on to 100%, the tester will report the data. At this time, afterburner has not been activated.

The main design performance parameters of XH-AN05-01J are: the maximum afterburner thrust is required to be more than 19 tons, the full power thrust without afterburner is more than 13.5 tons, the temperature in front of the turbine is 1520-1720 degrees Celsius, and the weight is 1400 kg.

The actual situation is that the weight of the prototype is 1410 kg, and the size is of course consistent with the drawing, but some parts have errors, so the weight has changed.

At this time, the full power without extra force has reached 144KN, about 14.7 tons, and the converted thrust-to-weight ratio is 10.5! 10.5!

All the staff on site were very excited to achieve this data without any additional effort. Mu Yang looked at the fuel consumption, and it was not much different from the design.

"Maintain for ten minutes and record the data!" Han Li ordered. "yes!"

The R&D personnel responsible for the control answered loudly.

Mu Yang's face is still calm, this is not considered a successful ignition, the afterburner has not been turned on. Time passed very quickly, and ten minutes were over in no time.

The engine was running stably. Han Li glanced at the chairman and saw that his expression was calm, so he issued a new order: "5% afterburner, pay attention to the temperature of the vector nozzle and afterburner!"

"yes!"

The tester who received the order started to activate the afterburner system, and the afterburner was added under the condition of full power without afterburner.

Suddenly, the oil pipe of the oil supply device supplies oil vigorously, the afterburner chamber oscillates and burns, the air pressure suddenly increases, and the temperature rises.

There is already a reddish-yellow tail flame at the tail of the vector nozzle, and it is daytime, so if you don't pay attention, you can't see it clearly. But if it's night, you can clearly see the bright plume.

"Report, thrust 151.1KN, normal operation! The temperature in front of the turbine is 820 degrees Celsius...850 degrees Celsius...fuel consumption..." "Afterburner 10%, lasts five minutes!"

"Report, thrust 158.8KN, normal operation! Turbine

The front temperature is 950 degrees Celsius...1010 degrees Celsius.. Fuel consumption increased by 14.5%... "

"Turn off the heat! Record the data and check the equipment."

The afterburner lasted for five minutes, and Han Li shouted to turn off the engine, allowing his subordinates time to record data and check. Turn off the flame for about a minute, then turn on the afterburner again.

"Add 15% power for five minutes!"

"Report, the thrust is 166.7KN, the operation is normal! The temperature in front of the turbine is 1050 degrees Celsius...1110 degrees Celsius... Fuel consumption has increased..."

"Add 50% power for 120 seconds!"

"Report, the thrust is 223.2KN, the operation is normal! The temperature in front of the turbine is 1420 degrees Celsius...1515 degrees Celsius...the fuel consumption has increased...

At this time, the afterburner reached 55%, and the thrust had reached a terrifying 22.32 tons, exceeding the design requirements. The fuel consumption rose sharply, and the temperature rose very fast, and the color of the cylinder was already turning red.

If ordinary steel is used, this temperature has reached the melting temperature, let alone above 1420 degrees Celsius, 1200 degrees Celsius can soften and damage the material.

In fact, when the afterburner reaches 30%, the thrust has reached the design requirement of 19 tons, which is far beyond Mu Yang's expectation. The fuel consumption at this time can be driven for more than half an hour with a full tank. It can be said that it is casual.

However, experiments overload running tests.

After the 60% afterburner test, turn off the flame and cool down for one minute.

In the event of an emergency, it does not take that long to completely cool down, so it should be used frequently. "65% afterburner for 30 seconds!"

When Han Li issued this order, everyone was very nervous, this is the highest requirement of the experiment. Success or failure depends on these 30 seconds.

"Report, thrust 238.0KN, normal operation!

The temperature before the turbine is 1620 degrees Celsius..1715 degrees Celsius.. The barrel is overheated, the temperature alarms, and the flame is automatically turned off, which can only last for 22 seconds. "

Following the tester's report, Han Li sighed, "Hey, it's still close."

This engine is equipped with temperature monitoring. If a component is overheated, it will continue to alarm. If the automatic control mode is turned on, the afterburner will automatically turn off.

In the case of an alarm, if it continues to be opened, the engine combustion chamber and cylinder will be damaged. "Boss, it's still a failure."

Mu Yang smiled, patted him on the shoulder and said, "It's not considered a failure, it's already exceeded my expectations. It's just a bit of a pity, the afterburn time didn't meet the design requirements, let's optimize it slowly."

238KN, equivalent to a thrust of 24.2 tons, the main design parameter afterburner thrust-to-weight ratio reaches a terrifying 17.1!

Of course, only for 22 seconds.

No!

It shouldn't be like this!

If you don't turn on the automatic control mode and don't worry about the engine burning out, it should take more than 22 seconds. Sure to last longer!

However, in this case, the vector nozzle is in a horizontal state. If it is facing downward, the temperature will rise faster due to the reverse thrust, and it will not last that long.

If the engine is put into service without optimization, Mu Yang thinks that the design maximum afterburner is 50%, and it can be used continuously for more than 120 seconds.

During the test just now, the highest temperature was still quite a bit lower than the warning line temperature.

And after 120 seconds, the temperature continued to rise very slowly, indicating that it was basically stable.

Of course, this level of 50% afterburner consumes a lot of fuel, which is about 400 kilograms per minute. If it is an 8-ton fuel tank like the F35, it can be driven for 20 minutes with a full load of fuel.

If the battle cannot be resolved within 20 minutes, then return with no fuel.

In actual combat, the afterburner does not last that long, it is intermittent.

In addition, fighter jets are also equipped with auxiliary fuel tanks to increase the fuel capacity. Generally, auxiliary fuel tanks can carry several tons of fuel. at this time,

Hearing the chairman's comfort, Han Li relaxed a little and breathed a sigh of relief.

That's right, another launch

The machine research institute may not be able to develop it yet, and it is impossible to successfully ignite it for the first time. It may take several years to develop it successfully.

Mu Yang added: "Look at how much fuel is left, test whether the maximum duration can burn 8 tons of fuel under the condition of 50% afterburner, and also test the duration.

However, first check to see if the device is burned out, and if there is no problem, you can test it. Han Li was taken aback for a moment, and soon understood the chairman's thoughts.

"Enough, there are 55 tons of fuel."

However, it was already lunch time at this time, so I had to postpone the inspection until the afternoon.

It takes a long time to check the engine. If all the checks are completed, it will take at least a few days to sort out the test data by the way.

In addition to the ignition test, there are many tests to be tested, and they are destructive tests, such as water absorption test, ice impact test, flying animal impact test, and tests in the case of blade loss. These tests will cause the engine to be scrapped directly. Charge a lot of engines.

Engine testing is so expensive, and the cost of testing is a bottomless pit.

After the successful ignition test of the civil aviation engine XH-AN05-01, more than 20 prototypes have been manufactured for testing, and the testing cost in the past few months has cost several hundred million yuan.

The morning test ended like this, and Mu Yang happily left the test site.

Today's test is a bit regrettable, but it's not bad, and I'm most afraid that it won't even be able to run the ignition. The next engine test cycle will be very long, Mu Yang plans to take a look when he has time.

The XH-AN05-01J engine is too powerful. Without the afterburner, the thrust-to-weight ratio reaches 10.5, and the maximum afterburner reaches 17.1!

Compared with the world's strongest turbofan engine F135-P-100, its thrust-to-weight ratio is 7.47, full afterburner thrust-to-weight ratio is 11.47, engine net weight is 1701 kg, transition thrust is 12.7 tons, and maximum afterburner thrust is 19.5 Ton.

It serves on the F35 with an empty weight of 13.3 tons, a maximum take-off weight of 31.8 tons, and a single engine.

XH-AN05-01J is much more advanced than F135-P-100, weighing only 1410 kg, but its transitional thrust reaches 14.7 tons, and its maximum thrust reaches 24.2 tons, which also means that the fighter equipped with it can carry heavier cargo , fly faster, and more flexible because of the three-dimensional vector nozzle.

When sleeping at night, Mu Yang had a dream.

He dreamed that he was sitting on a J-20, and the engine was equipped with XH-ANO5-01Jo, the latest king engine of Xinghai Group.

He looked around, and it turned out to be an ocean! The plane is on the aircraft carrier of the country!

Hey, how do I sit in the cab? I don't think I've ever flown a plane, have I?

It's not like, he never flew a plane at all.

However, based on his knowledge of the aircraft, he could understand the instrumentation and operation methods of the aircraft. When he held the joystick, he felt a sense of familiarity and a good hand feel.

strangeness.

"Mr. Mu, you are ready, you can take off."

Mu Yang heard the order from the take-off commander on the deck of the aircraft carrier, and also saw the expectant eyes of hundreds of people on the deck.

Before he had time to think about it, he turned the engine to 80% horsepower. Instead of relying on the ejection booster, he used a ski jump to take off. The takeoff distance is relatively long, and it is very dependent on the performance of the aircraft. If it is worse, it will fall directly into the sea.

Released the brake, and the J-20 rushed forward quickly. He felt a shortness of breath instead of a strong sense of thrust. At the same time, in just half a beat, he immediately gave full throttle and full afterburner.

After only running a few tens of meters, the speed of the J-20 increased rapidly, and he found that he could take off even without the ski-jump deck.

However, he couldn't allow him to think too much, the plane rushed over the ski-jump deck, soared into the air, and there was no tendency to fall, but went straight up.

Hundreds of people on the deck applauded enthusiastically.

However, when Mu Yang continued to pull up and take off, the plane seemed to be out of its control.

The system couldn't be turned off~www.mtlnovel.com~ No matter how tightly he gripped the joystick, it was useless, and then he fell headlong into the sea.

At the moment when he fell to the sea, he thought of his family.

Mu Yang was frightened and opened his eyes suddenly, only to realize that he had a nightmare. My head was covered with a quilt, no wonder it was a bit difficult to breathe...

"Lie!" "This

"No wonder."

Fortunately, the child is not sleeping next to him tonight, and his wife is next to him.

It seems that I haven't done gymnastics for a long time, and I saw that the time is already twelve o'clock in the morning. "Honey, are you asleep?"

Mu Yang's question, Song Xuelu just murmured, it seems that she didn't die of sleep.

He breathed a sigh of relief, he just didn't sleep, and he didn't ask for his wife's opinion, so he started to make small moves. Song Xuelu was in a daze, and with a half-knowledge, "Yeah", she followed Mu Yang.

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Chapter end