The military-industrial scientific research system of the academic master.

Chapter 1436 Tell comrades to gradually get used to the fact that we are already in the leading position

What Chang Haonan said is actually not quite accurate.

It is of course impossible to "guess" the cause of the WR-21 gas turbine failure based on just two parameters.

In fact, during his previous communication with Rolls-Royce, he discovered through indirect inquiries that the other party had problems in their understanding and calculation of the intercooling cycle, and thus roughly guessed the Achilles' heel of the British new generation of gas turbines.

The reason why Lin Xi and the others had to pay special attention to those two parameters this time was, firstly, to verify the accuracy of their previous guesses, and secondly, to determine how serious the problem was this time.

According to the current trend, when the Rolls-Royce delegation visits China early next month, the two sides will certainly test each other on the direction of improvement of WR-21.

However, the AE1500 will soon undergo the second phase of installation testing, and if it wants to obtain EASA's airworthiness certification at this stage, it will inevitably have to send one to France to obtain some data on the Airbus A340 platform. There will be no secrets in the overall structure.

Moreover, from the perspective of "joint research and development", the design parameters of this engine also need to be disclosed to partners.

Although design parameters are not equal to the design process, copying the drawings can only help you understand the results but not the reasons behind them.

But Rolls-Royce is not a real rookie after all. If the trouble faced by WR-21 is not too serious, there is a high probability that the other party can save itself by referring to the intercooler design ideas of AE1500.

In this situation, Chang Haonan must not go too far.

The best option is to make some symbolic offers, flex your muscles to the other side, and gain some advantage in future large-scale negotiations.

However, if the problem is more serious, it cannot be solved simply by borrowing ideas.

Then you can't blame him for asking for too much...

According to the report submitted by Lin Xi earlier, the process of assisting the other party in restoring power supply may last 4-5 hours. If the problem cannot be solved by then, it will be nightfall in the Gulf of Aden, and for the sake of navigation safety, they will have to give up the attempt.

In short, no matter success or failure, there will definitely be feedback.

So Chang Haonan did not leave after the call ended, but found a place that was not too conspicuous and not too in the way to sit down and rest, so that he could get the results as soon as possible.

Of course, in reality, it is impossible to rest.

What happened this afternoon, including the huge amount of information contained in the conversation with Lin Xi just now, was so overwhelming that the naval chiefs were already feeling very nervous. They wanted to ask a thousand questions, but they just didn't have the chance to open their mouths.

Now that I finally have some free time, I naturally won’t let it go.

So, before Chang Haonan could even sit down, the crowd that had been standing behind the console came to him and his companion Zheng Liangqun almost in an instant.

The latter was suddenly surrounded by a group of navy men and felt that he was out of place in the scene in his blue military uniform, but he couldn't just leave, so he could only stay where he was, a little awkwardly.

What everyone is most curious about are probably the two data that Chang Haonan just mentioned.

Including Zheng Liangqun, everyone wanted to ask him why he focused on such a peculiar thing.

But there is obviously something more important -

As Tian Baoyuan said before, according to the plan, the future 052D and newer generation large destroyers will be equipped with QC300IC gas turbines with a complete intercooling and heat recovery cycle.

And today, seeing the WR-21 using the same technology fail, it would be a lie to say that I am not nervous. "Academician Chang, from what you said just now... Is the failure of the Brave related to the working parameters of the intercooling and reheating cycle?"

This kind of question is not suitable to be asked by a senior leader, so the first person to speak was Deputy Director Zhao Ping, who was in charge of liaison at the time in the Navy Equipment Department.

Chang Haonan gave a routine conservative answer:
"Of course, it is still uncertain at the moment. We can only say that based on our past contacts with Rolls-Royce, this is the most likely scenario... And a simple gas turbine failure cannot cause the entire ship's power to collapse. Even the diesel engine and backup batteries cannot be started. BAE Systems, the contractor of the integrated power system, is certainly to blame..."

This statement is certainly accurate, but the naval leaders who were in a hurry had no time to delve into these details.

In their view, Chang Haonan's answer was basically equivalent to affirmation.

So we immediately transitioned to the real core issue:

"Then will our QC300IC gas turbines, including the QC300 basic model that has already applied the intercooling cycle, also have similar hidden dangers?"

Zheng Liangqun, who was standing next to him, was watching the fun with his hands in his pockets, but when he heard this question, he suddenly lost his composure.

Because he suddenly remembered that the Air Force also had a batch of WS-20s using the same technology...

Moreover, the Navy has only six ships in service, plus two 052Cs under construction, and the rest are still in the drawing stage, so the sunk costs are still acceptable.

The Air Force's Y-9s have already filled three transport aircraft regiments. In addition, about half of the regiment is being prepared for delivery at Yanliang Airport, and another half is being produced in Gaofei's workshop.

Although Zheng Liangqun personally believes in Chang Haonan, psychological factors are still difficult to overcome with simple rational thinking.

Looking at the group of serious-looking bosses around him, Chang Haonan finally understood where the low-pressure environment around him came from.

And, in the end, I couldn't help laughing:

"There is no need to worry about this, because our aircraft engines and ship-mounted gas turbines also use intercooling cycles or intercooling heat recovery cycles, but the layout of the intercoolers, cycle design, and most importantly, control logic are different from the British solutions."

"For example, the WR-21 used on the Courageous has its intercooler divided into two parts to reduce the complexity of the design stage. The hot-end intercooler is arranged inside the gas turbine, and the cold-end intercooler is arranged separately in the hull as an accessory. The heat exchange between the two is achieved through a heat exchange intermediate medium. The intercoolers of the QC300 and WS-20, including the intercooler duct, are fully integrated with the main engine. The entire cycle only requires two heat exchanges. Although the design is much more complicated, the working cycle process is much simpler."

"In addition, under the premise that the three-cycle system is already quite complicated, the British also chose the wrong control strategy. They adjusted the working conditions of the intercooler by analyzing the humidity changes after the wet air was compressed by the low-pressure compressor. However, we installed an additional condensation control module in front of the intercooler. We only need to ensure that the temperature of the wet air entering the intercooler is lower than the corresponding dew point temperature under this condition to ensure the normal operation of the cycle. The fault tolerance rate is much higher than that of Rolls-Royce's solution..."

"..."

After the explanation, although not everyone understood the technical details, at least everyone's previous concerns were dispelled.

However, Chang Haonan did not immediately return to silence.

Instead, after a pause, he added meaningfully:
"I think we can make this matter public in the future and explain it to all officers and soldiers who use the relevant equipment."

As expected, as soon as these words were spoken, they attracted many puzzled looks.

He then further explained:

"Comrades should be told to gradually realize that we are already in a leading position and break the inertia of thinking about foreign equipment in the past!"

(End of this chapter)