Compared with the intermediate thrust state, the afterburner cannot be opened for a long time, otherwise it will adversely affect the life and stability of the engine.

Therefore, in order to obtain the minimum amount of data required for a single round of experiments, afterburner experiments can only be performed in an intermittent form.

In the end, as Chang Haonan estimated at the beginning.

It lasted until the next morning.

So much so that most of the operators have changed shifts in the middle.

Of course, as the project leader, Chang Haonan must keep an eye on it.

Fortunately, since he was born again, he has gained the ability to "store" sleep time.

And some time ago, when the pressure of working on Rong Fei's side was not great, he slept a lot seriously, so he could still hold on.

And Jiang Fuhe is basically playing soy sauce.

The reason why they also stayed here was because they wanted to see the results of the sea level afterburner test at the first time.

Even if it is clear that the performance of this engine should be quite amazing, there is always a sense of excitement in the lottery.

Having said that, after all, he is already old, and he is not as young as Chang Haonan, and there are some things that are indeed powerless.

By the middle of the night, I was basically sleepy.

Chang Haonan meant to let the old comrades in their sixties go back to rest, and when the results came out, they would send him a copy as soon as possible.

But Jiang Fuhe's mentality at this time is a bit similar to the kind of fans who stay up late to watch the game, or buy the results, how can they agree to this kind of thing.

So he slept directly on a bench in the control room.

As for noise......

For a person who has been working in aviation for most of his life, if there is no roar of turbines in his ears, he may not be able to sleep soundly......

It wasn't until Chang Haonan couldn't tell whether it was the roar of the engine or his own tinnitus that the test commander finally stood up:

"Report!"

"The afterburner experiment data has been collected!"

When he spoke, his body even shook slightly-

The test commander is also in the leadership position here, so he cannot change shifts like ordinary operators.

So, he's been sitting at his desk for seven or eight hours straight.

Now when I get up suddenly, it is inevitable that there will be a problem of insufficient blood supply and blackening in front of my eyes.

"Alright, we're ready to end the experiment and summarize the output data."

Although he was confident in the engine test results, Chang Haonan was still slightly relieved when he said this order.

After a slight pause, he said in a less formal tone:

"When the engine is turned off and cooled down, you can go back to rest first, and other comrades can take care of the data part in the back."

The other party opened his mouth for a moment, probably because his first reaction was to refuse.

But the bloodshot in his eyes even made his vision a little red, so after thinking about it for a while, he nodded:

"Yes!"

"The results are in?"

At this time, Jiang Fuhe, who seemed to be sleeping very deeply just now, had already put on his coat and came back behind Chang Haonan.

It can only be said that the sword is indeed not old, although the ability to stay up late cannot be compared with young people, but even if you fall asleep, you can capture the key words-

Just when the test commander shouted the report, he was actually awake.

"The test is over, but the results still have to be processed before they can be output."

Chang Haonan didn't look back, but went straight to the computer that recorded the data.

Previously, the intermediate thrust data was measured continuously, so the results could be output immediately after the experiment, but the afterburner test was mixed with a lot of slow running conditions to cool the engine, so these parts had to be excluded.

"I'll do it, I'm familiar with this."

After all, Jiang Fuhe is a person from the 624 Institute, and he has just slept to recuperate, and the speed of operation is indeed much faster than Chang Haonan.

After about ten minutes, the sorted report was generated on the desktop.

Jiang Fuhe couldn't even wait to print it out, so he directly clicked on the content.

The thrust part, they've all seen it just now.

Although there were some fluctuations in the value later with the long-term use of the afterburner, it was still around 14150KgF overall, and did not change much.

As for fuel consumption......

After a total of 1.5 hours of afterburner testing, the average result was 0.189 kg/(N·h).

In the first 15 minutes, that is, in the first round of afterburner experiments, it can even reach 0.182kg/(N·h).

In comparison, the AL31F has this indicator of 0.198, while the low-performance F110 is already around 0.210.

"Compared with the middle thrust, the performance advantage compared to the AL31F is still a little smaller......"

Chang Haonan looked at the data on the screen and said with a slightly regretful tone.

made Jiang Fu and the straight tooth flower next to him-

Do you hear this is human talk?

Everyone else is worried about the performance of similar foreign products.

Do you complain that the advantage is not big enough?

However, this will Jiang Fu and he have already achieved a complete and complete self-reconciliation, so after complaining in his heart, the focus is still on how to further hug this thigh......

At the same time, he didn't forget to open his mouth to pick up Chang Haonan's words:

"I read the design data before, after all, the total pressure ratio of the turbofan 10 is still slightly higher than that of AL31F, and the correlation between the working state of the afterburner and the compressor is not too large.

Of course, Chang Haonan also knows that with the current processing and manufacturing level of Huaxia, the turbofan 10 can have today's level, which has been made up for to a certain extent by excellent design.

That's it, according to Haiyide, the 410 factory can only rub two units out every month.

It is not so easy to fully make up for the debts owed by the late-developing industrial countries, even if they are open.

He's definitely overdone.

Of course, if you think about it, you can't say it directly when you make a statement:

"Not exactly."

Chang Haonan leaned his upper body on the chair and rubbed his cochlea with both hands.

At this time, the speed of the engine has been reduced to a slow state again, and the high-frequency noise has also been reduced by several orders of magnitude, but the tinnitus still haunts him for a while:

"When the follow-up improvement, the afterburner still has to pay attention to it, and there are shortcomings......

This time, Jiang Fuhe was already used to it, or rather numb, and didn't turn his head back, and continued to focus on the other parameters below.

"The weight of the national military standard written in the technical manual of this engine is 1560kg, and the actual measurement is 1575kg after being put on the bench, so if you calculate it......"

He tilted his head and did a little mental arithmetic:

"The thrust-to-weight ratio at sea level is indeed 9......"

Although this matter has been confirmed with Chang Haonan a long time ago, the latter said that compared with the actual calculation of a 9.0 result, the degree of shock is still different.

"Of course, I am still a little confident in the reduction of paper design parameters, saying that how much is how much, and the error is basically floating around 5%."

This time, Chang Haonan was not overly modest.

"The total length of the engine is 4805mm, the maximum diameter is 1250mm, and the diameter of the air intake is 915mm......"

Jiang Fuhe glanced at the bottom of the report again, which has nothing to do with this test, but only the physical shape parameters of the turbofan 10 given as a technical background:

"I remember that the AL31F is 5 meters long and has a diameter of about 1280mm......"

"So, the turbofan 10 should be a direct in-situ replacement for the AL31F?"

"It depends on the specific situation."

After the whole person relaxed, Chang Haonan also felt a sense of sleepiness coming, but he still answered Jiang Fuhe's question:

"For the J-11, the internal space of the fuselage is large enough, the diameter of the air intake is 10mm larger is not a problem, and there is enough redundancy to lay the communication cables required for full digital control, so as long as the flight control is allowed to access, there will be no big problem for the two engines to replace each other even on the same aircraft."

"If it is a medium-sized aircraft like the J-10, it needs to leave corresponding space at the time of manufacturing, although the changes will not be very large, but once the aircraft is off the assembly line, it is impossible to be compatible with another engine model."

"So if the production capacity of the 410 plant is insufficient, we can only give priority to ensuring the supply of J-10, and let the J-11 wait a little longer......"

It is different from the previous J-10 long-term use of AL31FN, and the J-11B was replaced with turbofan 10 in the second batch.

The turbofan 10 on this timeline is not a bit outrageously high and can fully support the reliability required for a single-engine model.

Moreover, it was Chang Haonan who made the decision to change the J-10 to a larger and heavier Class II design scheme in the 611 Institute, so that the original planned AL31FN was difficult to meet the requirements.

If the supply of domestic power can no longer be guaranteed, resulting in problems in the delivery of aircraft, it is too inappropriate......

(End of chapter)