Chapter 917 "Minor Repairs"
Compared to the aviation manufacturing industry that has attracted much attention, and the vehicle manufacturing industry that is closely related to people's daily lives, the shipbuilding industry in the sea, land and air is actually a huge influence , but the presence is not too strong.
At least that was the case before the arrival of the self-media era.
Just like this time, a Norwegian company with a background of Zhuoer Capital approached Huaxia Shipyard to produce ultra-high value-added products such as LNG ships, and then the order was dramatically intercepted by a Korean company. In the industry, it is actually considered a Quite shocking news.
After all, no matter how bad Xi Zhuoer 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 increased sharply around the world in recent years.
The outside world does not know the details of the negotiations between the two parties, so it is naturally impossible to judge whether it is a scam or a real business.
But Chang Haonan has not seen relevant information in any public news reports.
Only a few words were mentioned in some newspapers published by industry.
Of course, this is a good thing to some extent.
This order 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, thinking that Samsung Offshore Engineering really stole the order.
Once public opinion begins to ferment, no one can guarantee whether problems will arise.
So there is an old saying in China, which is that making a fortune with silence...
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 months or even 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 this matter.
After all, it is not his main job. He only needs to be Party B of the BOG reliquefaction system.
The one who really added some extra workload to Chang Haonan in early September had to be 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 after the Chinese people perfected the M88-2, they immediately started research and development work on deeper modifications.
And the project progresses very quickly.
But precisely because of the fast progress, everyone subconsciously thought that this should be a transitional model, one with limited performance improvement but that could be used immediately.
Therefore, 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 postponed for a few months. For a project undertaken by Europeans, that is It cannot be considered a postponement.
And there are some fairly new Mirage 2000C/Ds on hand that can be used. Unlike the Navy next door, which can only use F8FR.
As a result, I held a meeting with Institute 606 and found that the upgrade plan proposed by the latter mainly involved three yuan.
Turbine, combustion chamber and high pressure compressor...
These three parts are usually collectively referred to as the core machine of the aircraft engine...
In addition, the new casing is reduced in weight through diamond-shaped ribs, and the ejector type is changed to a convergent-expansion type. tail nozzle.
That’s it, you have 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 the 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."
Vista couldn't find any other words to describe it, so he could only 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 added..."
"Vestal Sir, you don’t need to worry about the progress.”
Liu Yongquan touched his bald head and showed a confident smile: “Although from the technical documents, the parts involved in this upgrade and improvement are indeed. It is spread throughout the engine, but in general, it is still a minor repair based on the M88-2, and will not change the underlying design of the core engine itself. ”
“Small repairs?”
Vesta picked up the memo on the table again and quickly flipped through it to the end:
“But...it contains a total of 70 upgrades?”
“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 take Come and apply it to 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, Chang Haonan uses the slit and sweep design to control the boundary layer separation. This idea has been used since the Turbojet 14.
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 in the 606th Institute was so fast that it was over before Snecma's engineers could even react.
As a result, many places can only be understood slowly after going back.
Now that M88-3 involves more improvement projects, it 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 from the folder next to him He took out two more pages 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. Take a look and see if you are satisfied."
< br>Vesta never expected that such a heavy thing had not been taken out just now, so he quickly took it in his hands.
[The temperature in front of the turbine increases from 1740K to 1830-1850K. (Note: There is no need to replace the hot end material and thermal insulation coating)]
[Considering that the aerodynamic design of the Rafale is not inclined to high-speed maneuverability, it is considered to further increase the total pressure ratio to 30.5 to strengthen 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 completing the upgrade, it is expected that the sea level thrust will be increased from 7600kg to 8400kg, the total weight will be reduced from 830kg to 790kg, and the fuel consumption rate...]
This document is not large.
But before even reading 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...
< br>The result in front of me is a complete change.
For this reason, even if you take some risks, it is definitely worth it!
(End of this chapter)