The Military-industrial Scientific Research System of the Academic Master Chapter 917

Chapter 917 “Minor Repairs”

Compared to the aviation manufacturing industry, which has attracted much attention, and the vehicle manufacturing industry, which is closely related to people's daily lives, the shipbuilding industry in sea, land and air is actually an industry with huge influence, but its presence is not too strong.

At least that was the case before the advent of the self-media era.

Just like this time, a Norwegian company with a background of Zhuoer Capital approached Huaxia Shipyard to produce ultrhigh value-added products such as LNG ships, and then the order was dramatically intercepted by a Korean company. This is actually quite shocking in the industry. news.

After all, no matter how bad Xizhuoer is, he is still one of the top giants in the global marine engineering and energy fields. Moreover, the demand for LNG and LPG ships has indeed surged around the world in recent years.

Since the outside world does not know the details of the negotiations between the two parties, it is naturally impossible to judge whether it is a scam or a real business.

But Chang Haonan has not seen relevant news in any public news reports.

There were only a few mentions in some industry newspapers.

Of course, this is a good thing to some extent.

This list from Zall cannot be accepted under any circumstances. Instead, it will be dumped to the Koreans as a hot potato.

However, the details here certainly cannot be publicized through the media.

The people who eat melons can only see the most superficial things and think that Samsung Offshore Engineering really stole the order.

Once public opinion begins to ferment, no one can guarantee whether there will be unforeseen incidents.

So there is an old saying in China that you can make a fortune by muttering...

Ahem…

In short, shipbuilding is no better than building aircraft. No matter how fast the technological breakthrough is, it may not reach a major milestone in a few months or even a few years.

If you want to see a result on the LNG ship matter, you have to wait for a year or two no matter what.

Therefore, after the Hudong Factory had determined to avoid this pitfall, Chang Haonan did not continue to pay close attention to the matter.

After all, it is not his main job. He only needs to be the Party B of the BOG reliquefaction system.

The one who really added some extra workload to Chang Haonan in early September was the French.

After coming to Beijing to report the situation that day, Liu Yongquan turned around and reported his situation and requirements to his partners.

Snecma and Dassault were immediately shocked after hearing this.

They knew before that the Chinese people immediately started research and development work on deeper modifications after improving the M88-2.

And the project progresses very quickly.

But precisely because of the fast progress, everyone subconsciously thought that this should be a transitional model, the type with limited performance improvement but that can be used immediately.

That's why the French Air Force dared to make the decision to postpone the equipment update schedule and wait until it is upgraded to the F2 technical status before receiving it—

It is only expected to be delayed by a few months. For projects undertaken by Europeans, that cannot be considered a delay.

And there are some fairly new Mirage 2000C/Ds on hand that can be used, unlike the navy next door that can only use F8FR.

As a result, I held a meeting with the 606 institute and found that the upgrade plan proposed by the latter mainly involved three pieces.

Turbine, combustion chamber and high pressure compressor…

These three parts are usually collectively referred to as the core engine of the aviation engine...

In addition, a new receiver is reduced in weight through diamond-shaped ribs, and the tail nozzle is changed from an ejection type to a convergence-expansion type.

That's it, you've modified the entire engine from the outside to the inside, except for the fan and afterburner.

Co-authoring is just to prepare a new one?

Therefore, after Ian Vista saw this document at a technical meeting, he felt dizzy on the spot and almost fell over with a black eye.

"Liu, I admit that your improvement plan is very... bold."

Vestal really couldn't find any other words to describe it, so he had no choice but to comment like this:

“But we... still hope to come up with this improvement plan as soon as possible and upgrade the Rafale to a more mature F2 technology. As long as some envelopes can be optimized or a little thrust can be improved..."

“Mr. Vesta, you don't need to worry about the progress.”

Liu Yongquan touched his bald head and showed a confident smile: "Although according to the technical documents, the parts involved in this upgrade and improvement are indeed spread throughout the entire engine, but in general, it is still based on the M88-2 Minor repairs will not change the underlying design of the core machine itself.”

“Small repairs?”

Vesta picked up the memo on the table again and quickly flipped through it to the end:

“But…there are a total of 70 upgrades written in it?”

“Well...not all of them are important.”

Liu Yongquan also glanced down at the technical documents to hide the flash of embarrassment on his face.

Actually, he specifically asked the people below to remove these 70 items, just to show that this upgrade requires a lot of work, and many of them can get some benefits from the opponent.

Who would have thought that others would think the changes were too much.

After a short pause, he continued to add:

“And, the most important thing is that almost all of them are mature technologies that we have verified on other models. Now if we apply them to the M88, the risks and development cycle are absolutely controllable.”

This sentence is half true and half false.

The new air film hole design and combustion chamber atomization nozzle can indeed be adapted. Although it is impossible to copy the compressor as it is, the use of slits and curved sweep designs to control boundary layer separation is also what Chang Haonan learned from the turbojet 14. An idea that I have been using since the beginning.

However, the new lightweight receiver and the convergent expansion nozzle with better low-altitude adjustment capabilities are all parts that Chang Haonan plans to use the M88-3 as a guinea pig for verification and testing.

Of course, these two places do not involve the core part of the engine, so Liu Yongquan's statement that the risks and cycles are controllable is not a lie.

"this…"

Hearing Liu Yongquan's assurance, Vesta hesitated a little.

To be honest, the improvement of the M88-2 by Institute 606 was so fast that Snecma engineers ended it before they could even react.

As a result, many places can only be understood slowly after going back.

At present, M88-3 involves more improvement projects, which is also a good opportunity to practice.

Looking at Vesta, who was bowing his head and thinking silently, the former knew that his attitude had begun to loosen, so he continued to increase the pressure.

“Mr. Vesta, when we had our last meeting, you and Mr. Ed Steiner mentioned that they hoped to improve Rafale's performance against EF2000 through this upgrade.”

“In our opinion, if we really want to take advantage of the competition, we must make a major upgrade to the M88 engine.”

He said as he took out two more pages from the folder next to him and handed them to the other party:

“This is the expected performance index of the M88-3 model after completing the upgrade according to our plan. Please take a look and see if you are satisfied with it.”

Vesta never expected that such a heavy thing had not been taken out just now, so he quickly received it.

【Turbine front temperature increased from 1740K to 1830-1850K. (Note: There is no need to replace the hot end material and thermal insulation coating)]

Considering that the Rafale's aerodynamic design is not geared towards high-speed maneuverability, it is considered to further increase the total pressure ratio to 30.5 to enhance subsonic thrust and fuel consumption. 】

【The air intake volume per second is increased by 7% on the original basis, used to increase thrust and provide cooling...】

【Comprehensive calculation, after the upgrade is completed, the thrust at sea level is expected to increase from 7600kg to 8400kg, the total weight is reduced from 830kg to 790kg, and the fuel consumption rate...】

This document is not large.

But even before he reached the second page, Vesta was convinced.

Previously, Snecma's internal judgment and expectation was to increase the output by 5% based on the M88-2 and further optimize the output under large overload at medium and low altitudes...

The result in front of us is completely a radical change.

For this reason, even if you take some risks, it is definitely worth it!

(End of this chapter)

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