Jiang Fuhe's guess was naturally correct.

Chang Haonan and he looked at each other in confusion for a while, and then nodded:

"Although from a rigorous engineering point of view, I can't guarantee that the situation will be until I actually turn on the afterburner and measure the data."

"But...... At least as far as my goal is concerned, it is true that the sea-level afterburner-to-weight ratio of the turbofan 10 is 9. ”

Speaking of which, perhaps because he felt that the content of what Jiang Fuhe said just now might cause ambiguity, so he added:

"I mean, the real 9, not the rounding kind."

In fact, the reason why the two people have differences in their understanding of this matter is mainly because of the different backgrounds of the times.

In the 90s, everyone's main equipment was actually a product that was developed in the 70s and 80s.

(Of course, most of the main equipment on the Chinese side is still from the 50s and 60s...... ）

During the Cold War, both sides of the Iron Curtain tended to report the performance of their equipment as high as possible, whether purely out of face-saving factors or out of practical considerations of exerting both military and psychological pressure on the other side.

A typical example is that both the United States and the Soviet Union have long been obsessed with using specially modified aircraft to brush records.

There is hardly any practical significance, but both sides enjoy it.

Therefore, for Jiang Fuhe, who has been working since the 60s and has almost completely experienced this stage, the concept in his mind is naturally like this.

But although Chang Haonan has been reborn for almost two and a half years, the time when he really got educated and learned to do projects was at the beginning of the 21st century in his previous life.

At that stage, the propaganda of equipment performance in various countries gradually turned pragmatic, and many of the habits of opportunism in the past were gradually corrected.

More importantly, Huaxia gradually began to establish its own industrial discourse system, and no longer completely followed foreign countries.

Although since 2010, with the gradual rise of Internet thinking, the habit of drawing a big pie on PPT has reappeared, both at home and abroad, and it is even more crazy than during the Cold War, but at that time, Chang Haonan's academic habits have been basically stereotyped, and the impact is relatively small.

That's when some ideas emerged that were "out of place" with this era.

On the other side, Jiang Fuhe was directly in awe after hearing Chang Haonan's explanation.

In his opinion, Chang Haonan is no longer just down-to-earth.

It's all about making it difficult for yourself.

According to the past international practice, there is no problem with the current turbofan 10 directly called "thrust-to-weight ratio 10 first-class aero engine".

At that time, if you move your thinking a little in publicity, you can directly say that China's aero engine has jumped directly from the second generation to the fourth generation.

And Chang Haonan himself can basically wait directly for the evaluation of academicians.

But now it's a mess......

"Hmmm......"

"Huh?"

Thinking of this, Jiang Fuhe's train of thought stopped.

Because he suddenly realized......

It seems that even now, as long as the other party can finish the turbofan 10 project, they can sit and wait for the academician to be evaluated......

"Alas......"

Jiang Fuhe sighed.

After all, it's narrow-minded.

Others in their twenties have basically touched the upper limit of the existing system, so naturally they don't care about this anymore.

Thinking about it like this, he even felt a little inferior.

"Mr. Chang, the data of the intermediate thrust has basically stabilized, do you think you will start to open the afterburner directly?"

Just when Jiang Fu and EMO were emo, the test commander next to him opened his mouth to ask Chang Haonan, and at the same time handed over a temporary performance report to the latter.

The thrust curve just now has been unbelievably smooth, so it's nothing to look at.

And more complex data can't be presented on a piece of paper in real time.

Therefore, Chang Haonan still focused on the fuel consumption of the middle thrust.

For military models, economy and environmental protection do not need to be considered, and fuel consumption will mainly affect the range of the aircraft.

In particular, the thrust of the turbofan 10 has increased by about 10% compared to the AL31F.

More thrust brings performance gains, but it also means more fuel in the same operating hours.

He flipped the report to the other side and quickly found the numbers he was interested in.

0.0745kg/(N·h)……

At this time, Jiang Fuhe, who had already adjusted his mentality, also came over:

"This ...... That's almost 6% lower than the AL31F's fuel consumption, which is quite impressive for the total pressure ratio of 25 for this engine. ”

Chang Haonan's slightly tired face finally had a slightly satisfied expression, and nodded:

"Well, it can basically offset the increase in fuel consumption caused by the increase in thrust, which can be regarded as ensuring that the range of the third-generation aircraft after the replacement is basically the same as before."

Although this figure is slightly higher than the F110's 0.07 or so, the latter is specially optimized for subsonic performance after all, and the thrust fuel consumption in the middle must be cheaper.

Considering that the fuel consumption of the AL31F base model, which is also in the afterburner state, is as high as 0.0795, the fuel economy of the turbofan 10 should be considered quite good.

After all, before the engine entered the era of variable cycle, whether it was three generations or four generations, it was impossible to escape the limitations of the laws of physics in this area.

Thinking of this, Chang Haonan took a deep breath and put a page of paper in his hand on the table next to him:

"Prepare for afterburner."

If it is an aviation engine that does not have full authority electronic control before, then before the start of each test, all items must be determined, and it is difficult to add them in the middle.

But for the turbofan 10, as long as the engine is guaranteed to be fine, then one more command is sent on the console side.

"Yes!"

The test commander returned to his workstation and pointed into the microphone and gave a deep order:

"Attention everyone, start the afterburner!"

The operator at the other end of the control room then pushes the analog throttle valve to the "afterburner" position at the very end in the control computer.

Almost at the same time as he made his move, the roar of the engine, which had already numbed everyone, became more and more shrill.

And the images of several cameras are also dazzling white due to overexposure in an instant.

The next few seconds were as long as centuries.

As the lens aperture automatically adjusted to a more suitable size, everyone was finally able to see inside the test shop.

From almost every angle of the camera, a translucent bright purple tail flame with a Mach ring behind the engine tail vent can be clearly seen.

On the working condition display next to it, the cooling power of the water cooling device in the exhaust section of the high-altitude platform is also fully charged in an instant.

"I'll ......"

When Jiang Fuhe saw this scene, his whole person shook directly:

"If the temperature of your tail flame is 50°C higher, I guess I will have to forcibly stop the test......"

"Is that so?"

Because the afterburner condition has not stabilized now, Chang Haonan's attention just now was not on the parameters.

Now when I heard the other party say this, I realized that I had basically touched the upper limit of this platform......

Jiang Fuhe nodded with a smile:

"When this platform was put into use the year before last, Academician Liu and I expected that it could support the high-altitude simulation verification of the aviation engine within 20 years."

"As a result, it's only been two years, and I almost didn't resist ......"

There was emotion in his tone.

The development speed of Huaxia in Hangfa is indeed 100 million points different from the previous expectations.

Fortunately, it's a good difference.

"It feels like it's time to put the construction of cabin 2 on the agenda......"

"Don't be in a hurry......

Chang Haonan waited for the parameters to stabilize and comforted the other party:

"The core engine of turbofan 10, for a long time, should be the most powerful aviation gas turbine in our country, even if the subsequent development of a large bypass ratio model, it is impossible to have an afterburner in the back."

"So...... Although 20 years may not be able to last, it should not be a big problem in five or six years. ”

"Five or six years ......"

Obviously, Jiang Fuhe next to him didn't get much comfort from it.

He opened his mouth several times, but remained silent.

First, I have to shout at the top of my voice in this environment, which is a little tiring.

And I'm afraid of hearing any inhuman words from the other party's mouth.

After all, today is already very devastating......

In a scorching silence, the thrust curve, which had just fluctuated a little, gradually stabilized.

Since the principle of afterburner combustion chamber is to directly inject fuel into the gas or fan backstream for combustion to increase the aftercombustion speed, it is certainly not comparable to the intermediate thrust state in terms of thrust stability.

It's pretty good that there's no overly obvious up and down.

As for the result, it was already expected for the two of them.

At most, it's just a verify.

"Sure enough, 14150±300 kgf......"

Jiang Fuhe took off the overalls hat on his head and read the number to himself.

In this moment, he was completely relieved.

(End of chapter)