Chapter 986 Ship Gas Turbine
Liu Chenchen has the key to Chang Haonan’s office, but he certainly cannot let anyone in casually.
So, when the latter returned upstairs, Yan Zhongcheng was waiting in the corridor, holding a cotton hat in his hand and fanning himself with the ear protection part.
Looks like an ordinary old man from Northeast China.
"Mr. Yan, why didn't you contact me in advance when you came here? I'd better be prepared."
Chang Haonan said as he took out the key and opened the door.
In fact, his main feeling about Yan Zhongcheng's arrival was that of surprise.
Especially when the other party went directly to the Torch Laboratory.
But no matter what, the two have been in a relationship for so many years, so they are definitely welcome.
"I am also in Beijing for a meeting, and I thought I would stop by to see Mr. Chang..."
"A meeting?"
Chang Haonan stopped opening the tea box:
"Isn't it a little early?"
At the end of winter and the beginning of spring, we will talk about going to Beijing. During the meeting, Chang Haonan naturally thought it was a national conference.
But that should only start in mid-March.
"It's not that meeting..."
Yan Zhongcheng quickly denied:
"It was a symposium held by the Naval Equipment Department, including our 606th Institute and the 703rd Institute of Shipbuilding Industry. Several institutes went there. "
Although the theme of the meeting was not mentioned directly, there is basically only one possibility to put Institute 606 and Institute 703 together:
"New. Marine gas turbine? ”
Chang Haonan frowned:
“But...the group level has not received any news about the start of the selection?”
The gas turbine selection currently being carried out must be for the new destroyer. used, and it will most likely be the main model in the next twenty years or even longer.
In fact, the reason why he planned to develop a 30-megawatt turbofan 10 aerospace engine early that year was to target this demand.
Now that the production of the turbofan 10 has been completed, the establishment of the QC300 project should indeed be put on the agenda.
But in any case, it is impossible for such a big matter to be settled between the Naval Equipment Department and several secondary research institutes.
It must involve the General Equipment Department and the group level.
But he didn’t hear anything about it.
“Oh... we haven’t officially started selecting models yet.”
Yan Zhongcheng explained:
"Haizhuang didn't say it clearly, but I guess... this time we should just check it out in advance so that the higher-up leaders can have an idea."
Chang Haonan sat down with Yan Zhongcheng holding two cups. He sat on another sofa next to him and gave the latter a cup with tea in it:
"Other institutions have nothing to say, and there should be no competitive products on hand."
< br>"There are only 703...it should be working on the domestically produced UGT25000 now?"
Yan Zhongcheng took the tea cup, his expression and movements seemed a bit reluctant -
For him, the situation was a bit embarrassing after Chang Haonan took office as the chief planner of the Aerospace Power Group.
It is equivalent to his former subordinates now becoming superiors.
Normally speaking, this situation is actually not particularly rare.
And when he was working on the August 3rd Project, Yan Zhongcheng had guessed that this day would come sooner or later.
The problem is that Chang Haonan’s reversal was too early...
There was no time to adapt.
Of course, this is human nature.
Chang Haonan can also understand.
But precisely because he could understand it, he roughly guessed from just now that the other party came to visit him specially today, and it was definitely not just a drop-in.
Now it seems that is indeed the case.
"Yes."
Yan Zhongcheng nodded:
"There have been rumors that this symposium will not only affect the selection of naval gas turbine models, but also the subsequent selection of the entire domestic destroyer. Development route.”
“052C?”
Chang Haonan asked almost subconsciously, but immediately realized that the time was not right:
"No...the first two 052Cs are about to be launched..."
"That is the new and improved model in the future..."
The model demonstration of 052B/C was as early as 1993 It had been completed at that time, and now, the eight units used on the four ships 168-171, plus the two units used as backup, a total of ten UGT25000 units have all been shipped to China.
In any case, the design plans of these two models are unlikely to change.
Therefore, the influence route mentioned by Yan Zhongcheng can only be the updated 052D.
However, due to some influence from Chang Haonan, the current design of 052C in this timeline actually has a lot of shadows of the previous 052D, such as the more versatile common frame vertical hair, and skipping air cooling directly. Water-cooled 346 radar. Of course, there are also hangars and helicopter decks that have become longer to accommodate the Z-12 helicopter.
So it is difficult to predict what 052D will become in this life.
“Although the 052C has not yet been launched, the combat system has been fully verified on the Bi Sheng. The 052B using the same power and hull design is also undergoing trial trials. The Navy is generally very satisfied with the performance of this combination. Satisfied..."
Speaking of this, Yan Zhongcheng took a sip of water before continuing:
"So, whether the 052C will directly start mass construction, or just build two ships like the previous models, as a verification of the regional air defense system, and then develop a newer model with stronger combat effectiveness, there is no conclusion yet."< br>
“The hull of 052B/C, especially the compartment distribution, is designed to use UGT25000. If 052C is mass-produced, UGT25000 must be fully localized.”
"Now the 703 Institute has actually pushed the localization rate to almost 75%. Basically, most wearing parts no longer need to be imported. It is a low-risk, low-cost, short-term and fast option."
"However, , and some people believe that the UGT25000 was not originally designed as a power gas turbine. Although the power is sufficient, it cannot be compared with similar models in terms of fuel consumption, vibration, failure rate, or size, and is not suitable for long-term use as the main model in my country..."
"I came today just to ask Mr. Chang your opinion on this matter..."
After hearing this, Chang Haonan finally understood.
Both shipbuilding industry systems and aviation industry systems currently have gas turbine research and development capabilities, but the logistics needs of the military determine that it is impossible to be equal in selection.
It can be regarded as another version of the sea-air gas turbine dispute.
In the original timeline, the Turbofan 10 itself did not mature until after 2010, so this competition ended almost before it started——
The localization of 703 Institute GT25000 is actually the only option and wins without any suspense.
But now, the fate of Turbofan 10 is completely different.
Although compared to GT25000, QC300 has not been officially approved as a project, and even specific technical indicators have not been released yet.
But seeing that the little brother in the Air Force next door is now full of oil, the Navy, as the second brother, has to consider a more attractive option.
That is to be greedy again.
Anyway, the military struggle situation has eased to a certain extent in recent years.
It seems that it is possible to achieve more advanced gas turbines in one step.
This can also be used to achieve common models with larger capital ships and other gas turbine-powered auxiliary ships that may exist in the future.
And Yan Zhongcheng is undoubtedly here to ask for advice.
"Mr. Yan, you should have seen the detailed technical specifications of the turbofan 10 core machine, right?"
Chang Haonan did not directly give a countermeasure, but asked a seemingly unfamiliar question. Very relevant question.
"Of course."
Yan Zhongcheng replied without hesitation:
"After the QC130 was finalized, I was actually considering aeroderivative combustion based on the turbofan 10, but At that time, whether the group or the 606 institute, all resources will be concentrated on the turbofan 10 itself..."
"That's fine, as long as you have a good idea of the situation of the turbofan 10. "
Chang Haonan waved his hand and interrupted the other party:
"Compared to the 703 Institute, our solution has an absolute advantage in technical indicators."
"Even according to the most conservative estimate, the QC300 can fully compete with the LM2500+ just installed by the US military. That is 30MW rated power, 0.21kg/(kW·h) fuel consumption, simple cycle efficiency between 38-40, and a total weight of 5.5 tons...or lighter."
"Especially. The last item is that even if the hull design itself does not undergo major changes, a lighter and smaller gas turbine can leave more internal space and place a lower burden on the turbine department.”
“In addition, due to the smaller size of the QC300, even if an intercooled heat recovery system is added, it will not bring too much pressure to the cabin.”
The so-called intercooled heat recovery means that it , add an intercooler between the high-pressure compressor and a regenerator at the exhaust port.
The intercooler reduces the temperature of the air entering the high-pressure compressor, thereby reducing the compression power consumption of the high-pressure compressor.
The regenerator allows the compressed air to absorb the heat in the exhaust gas, thereby reducing the amount of heat that needs to be added to the combustion chamber.
At the same time, the intercooler can also correspondingly reduce the outlet temperature of the high-pressure compressor, thereby increasing the temperature difference between the fluids on both sides of the regenerator and further improving the heat exchange efficiency of the regenerator itself.
Thus significantly improving thermal efficiency.
For the QC300, which can achieve a thermal efficiency of 39% in a simple cycle, if it is changed to an intercooling and heat recovery cycle, it is not an exaggeration to increase the efficiency to about 45% under ideal working conditions.
Yan Zhongcheng also smiled after hearing this:
“If you say that, Mr. Chang, then I’ll be relieved...”
“Our QC300 now even has the drawings. No, if I say it in vain, the Navy will inevitably have concerns... But if I say this is the information revealed by you, Mr. Chang, the persuasiveness will be different..."
Chang Haonan almost Not holding back——
Compared to asking for advice, this wave seems to be closer to seeking endorsement.
Fortunately, the results are similar.
“Ahem——”
He cleared his throat:
“Don’t be too aggressive then. After all, the overall design of the ship is still completed by the shipbuilding industry. , no matter what, cooperation is indispensable in the future, and it is not good if the relationship becomes tense..."
"In addition, during the process of developing QC300, we can consider cooperating with the 703 Institute."
"First of all, we can't take all the benefits... Secondly, the ship's power system does not only include gas turbines. After all, the other party is a research institute of the shipbuilding industry and has much more experience in ship-fuel cooperation than we do..." < br>
(End of this chapter)