Chapter 989 So terrifying.jpg
??After Jacky Wen finished speaking on his last page of PPT, he turned around, stood on the podium and looked around.
The following people from the navy and other technical personnel from other fields either lowered their heads in thought, nodded, or wrote furiously...
In short, they all showed a very serious attitude.
Obviously, his introduction this time has worked well.
?Seeing this scene, Jacky Wen couldn''t help but breathe a sigh of relief.
?He put his hands behind his back, giving a feeling of looking down at the world.
Although the foundation of GT25000 is indeed not as good as QC300, this is mainly reflected in its design as an industrial gas turbine.
Whether it is power generation or pipeline power, there is no need to pursue extreme compactness.
After switching to marine power, this aspect became a shortcoming that was difficult to optimize.
?However, Jacky Wen feels that, regardless of future matters, if he eats the power system of the 052 series follow-up ship today, the problem should not be big.
On the one hand, the index performance of GT25000 is not bad, and it also has considerable upgrade potential, which is completely sufficient for the 052 series.
On the other hand, it is also more important.
He has seen the gas turbine designed by 606 for the Type 054 frigate based on the turbojet 14.
From a technical point of view, it is indeed close to impeccable.
But it can be seen that the other party is still designing gas turbines with the same ideas as designing aviation engines.
For example, in order to improve fuel economy under normal conditions, a relatively low design point speed has to be selected, resulting in a certain impact on the maximum power and corresponding efficiency of the speed.
It is precisely for this reason that today he specifically mentioned the adaptive processing technology of the receiver that can broaden the working range.
After all, even in a diesel-fuel alternating power system, the gas turbine cannot always operate at high speed.
Cruising diesel engines generally can only provide a speed of just over 10 knots. If you want to go faster, whether it is 20 knots or 30 knots, you have to start the gas turbine.
With this thought in mind, Jacky Wen slowly walked off the podium amidst a burst of warm applause.
?Even in the process of returning to his seat, he even made a short detour and passed by Yan Zhongcheng.
? It turned out that although the other party was also lowering his head to remember something just now, the content was different from what he imagined -
??Although it was just a quick walk, Jacky Wen still caught sight of a piece of content with his excellent dynamic vision.
“The casing treatment has little impact on the core part of the whole machine, and the effect is poor compared to xxxx technology…”
“Is it possible to consider combining receiver adaption and xxxx technology?”
…”
…
Jacky Wen held his breath almost subconsciously.
Yan Zhongcheng’s handwriting is very fast, and the time is short, so many of the handwriting can only be half recognized and half guessed.
But everyone is engaged in gas engines, so most of the content is not difficult to guess.
Only the xxxx technology, I don’t know what it is at all.
Jacky Wen spent a few seconds picking up all the proper nouns in his mind and comparing them, but he couldn''t find any matching ones.
?At this moment, he who was so confident just now finally realized that something was wrong.
? Regardless of what xxxx is specifically, it seems that the purpose of the other person taking notes is not, or at least not just to learn ideas as I thought before.
rather like in…
Prepare countermeasures.
This countermeasure was not even improvised.
It is prepared in advance.
Yan Zhongcheng wouldn’t just make up a technical term to deceive everyone, right?
Just like that, when Jacky Wen sat back down in his seat, a thin layer of sweat even appeared on his forehead.
I didn’t even hear an engineer from the Shanghai 711 Institute next to me ask technical questions.
It wasn’t until the other party called him again that he reacted.
Institute?711 is responsible for the research and development of marine diesel engines.
??It''s just that it''s not the main engine for cruising, but the auxiliary engine for power generation.
“Mr. Wen.”
?The other party looked over:
“Is it possible that the technology you developed can be used in the intake rectification of internal combustion engines?”
Wen Xueyou had no choice but to temporarily turn his attention away from Yan Zhongcheng:
“Of course there is no problem in theory, but I remember that internal combustion engines do not rely on airflow characteristics like gas turbines. As long as sufficient air intake is ensured..."
“Of course this is generally the case, but if it is a diesel engine equipped with a sequential supercharging system, in some special cases it is still necessary to make some adjustments to the air flow, but it does not need to be as precise as your steam turbine..."
…”
?Just as the two people were discussing the issue, Yan Zhongcheng was already standing on the podium.
The conference room that had just been a little noisy became quiet again.
“I just listened to Jacky Wen’s introduction, and it was a great benefit to me…”
After a brief opening remarks, Yan Zhongcheng directly praised Jacky Wen.
?However, from the latter''s perspective, this compliment seems to have a bit of a sinister and even gloating meaning.
This made him frown.
The uneasiness in my heart became more and more intense.
"Compared to the GT25000, which is already very mature and has even been installed and tested on ships, our QC300 should be considered a new face to our colleagues in charge of power system research and development." Yan Zhongcheng said with a slight smile in his tone at the beginning. But at this point, the conversation immediately changed:
“However, judging from the performance indicators alone, comrades in the Navy may feel a bit familiar..."
He said turning the PPT to the second page.
The above is a quite detailed performance data table.
The content is naturally what Chang Haonan said before.
QC300 has not officially entered the research and development stage at this time, so it is naturally impossible to have such details as the power-speed curve.
?However, as far as the current situation is concerned, it is enough.
Almost as soon as the form was released, there were several bursts of exclamations in the venue.
It’s not because of basic numbers like power and efficiency—
Although these data are equally dazzling, Chang Haonan had already drawn the pie when the Aerospace Power Group was established.
It belongs to the part that everyone has been mentally prepared for.
The key is the characteristics of this model.
Size, weight, box-packed design, and some modular ideas.
Even a layman can tell at a glance that the QC300 and core machine are structurally very different from the TF39 and have no technical connection.
But for installation, use and maintenance, the shadow of LM2500 can indeed be seen.
This is also the advice Chang Haonan gave a few days ago—
For the Chinese Navy, the LM2500 is the undisputed white moonlight as a ship power.
??If the acquisition channels were not locked, there is a high probability that there would be no GT25000 at all.
Although the QC300 is not the LM2500, it can benchmark in all aspects and even surpass the newly installed LM2500+ in key indicators.
Even from an emotional point of view, it has enough lethality.
?After deliberately pausing for a while, Yan Zhongcheng continued to enlarge his moves:
"Every comrade should be aware that the turbofan 10 designed by the general manager of our office has been installed on the J-10A and J-11B models and has officially passed the production finalization at the beginning of the year. Calculated from the establishment of the project, it only cost a lot of money. to five years, so in fact, there is no need to worry too much about the development cycle of QC300..."
“At present, the first two Type 052C destroyers are close to being launched, but as far as I know, there is no clear plan for the construction of follow-up ships. Judging from the timetable, QC300 can fully catch up with the progress of follow-up ships and even follow-up models…”
For the navy, this passage is absolutely lethal—
The speed at which China''s aviation equipment has been introduced over the years has been noticed by everyone.
It can even be said that the reason why the Navy has the idea of ??continuing to improve the 052C is largely influenced by this...
Or rather stimulated by this.
?Now that Yan Zhongcheng has spoken out directly, he has naturally gained a lot of recognition.
As for some of the Spring and Autumn style of writing in this paragraph, such as "Turbofan 10 is responsible for the capture of 606" and other details, no one cares about it.
Jacky Wen sat in the audience and adjusted his posture awkwardly.
He knew that if he only judged from the current situation, then the opponent could only have some advantages on the scene at most.
?Just by mobilizing emotions and playing emotional cards, you can win for a while but not for the rest of your life.
After all, when making the final selection, everyone has to come up with detailed technical solutions.
??But the words Yan Zhongcheng just wrote in his notebook made him unable to let go.
?Thinking of this, Jacky Wen moved his eyes away from the curtain in front and turned to the seat where Yan Zhongcheng had just been seated.
?The notebook was quietly placed on the small table next to it.
At the same time, Yan Zhongcheng’s introduction also happened to come to this part.
“Actually, after our QC130 was finalized, we also learned a lot of lessons from it...”
??He certainly couldn''t say that he had just asked Chang Haonan for temporary help two days ago, so he had to push the source of the idea of ????this technology to the reflection on QC130.
?However, this explanation is almost seamless, and it is impossible for people who do not know the inside story to find anything wrong.
“Including what Mr. Wen just mentioned, naval gas turbines need to work at a speed far lower than the design point for a long time, so special attention needs to be paid to the actual performance under low operating conditions...”
Hearing this, Jacky Wen''s heart tightened suddenly.
He knew the point was coming.
“In order to fundamentally solve this problem, we plan to use multi-stage adjustable stator vane matching technology on the high-pressure compressor of the QC300 to ensure its stability and high performance under all operating conditions. The basic principle is to adjust the speed according to different speeds. Different stator blade attack angles and blade tip clearances are selected for the intake flow characteristics of the lower compressor..."
…”
With a "click-" sound.
The pen in Xueyou Wen’s hand fell.
? He ??has now thought that the "xxxx" that he couldn''t understand before is actually the four words "adjustable static leaf".
Obviously, I still greatly overestimated the negative impact of lack of experience on the other party.
In other words, the other party’s ability to self-correct is greatly underestimated.
?As for the imperfections of QC130, others have already begun to make adjustments before the trial of 054 has begun.
It can almost be said that the celebration banquet and the reflection and summary meeting were held together.
Such efficiency, and such execution...
A sense of crisis suddenly came to my mind.
“What a formidable opponent…”
He bent down to pick up the pen, thinking silently at the same time.
(End of this chapter)