Chang Haonan's resounding words made the entire negotiation venue instantly quiet.

In fact, before this negotiation, the Huaxia side did not know why the European side suddenly came to cooperate, so there was no way to prepare in advance, so it could only find relevant technical personnel to meet and dismantle.

Therefore, except for Huai Guomo, who had just seen the strip, and Lin Guofan, who had participated in the research, everyone showed an expression of disbelief for a while.

The people here in Huaxia didn't know that they were so awesome.

Even the recorders on both sides had difficulty judging how to record the content, so they had to look up at the speaker, who seemed to be "talking wildly".

After a short period of sluggishness, the European delegation on the opposite side quickly began to discuss each other.

One of them, an old man with silver hair and glasses, stared at Chang Haonan for a long time before asking.

"I'm sorry, but I need to confirm again, do you mean supercooled droplets with millimeter particle size when you say SLD conditions?"

He also looked like a technician, mainly because the look in his eyes did have the look of a mad scientist when he saw the subject of his study.

"Of course, and I can reveal some more precise information here."

Chang Haonan, who had already expected to face a similar problem, nodded almost without thinking and replied:

"Specifically, we have conducted theoretical and engineering studies on the phenomenon of large-scale droplets with particle sizes ranging from 400 microns to 1 millimeter impacting solid surfaces at high speed."

"The current results show that large-scale droplets are very different from ordinary droplets below 100 microns in the past, and some of the basic assumptions of the past, such as 'water droplets do not produce thermal motion during impact', are no longer applicable under SLD conditions, so a whole new set of research methods and even theoretical systems need to be created."

After hearing Chang Haonan's words, the white-haired old man obviously became more excited:

"So what approach did you use to explain the mechanism by which the typical critical ice shape affects the change in the aerodynamic performance of the airfoil? In addition, from the perspective of airworthiness safety, is there a way to evaluate the specific aerodynamic characteristics of the airfoil after icing......"

"Ahem—"

Before he could finish his series of questions, he was interrupted by a light cough.

To be able to ask such a question at the negotiation site is simply outrageous.

Chang Haonan narrowed his eyes slightly and glanced at the name tag in front of the other party-

Fernando Lorenzo.

Chang Haonan vaguely remembered that he seemed to have read the paper written by this person in his previous life, but he couldn't remember what it was about.

"Mr. Lorenzo, I think I need to remind you that this is not an academic seminar, but a negotiation site, and if you are really interested in these issues, then I will be happy to share the results of these studies with your technical staff when the agreement between us is reached."

The few words that had just been revealed were just to convince the European delegation that Huaxia had really studied the issue of SLD icing.

Now, judging by the reaction of the other side, there is no doubt that the goal has been achieved.

Of course, he couldn't have revealed any more information.

When Chang Haonan said this, Lorenzo also realized that the occasion was not right now, and showed a somewhat embarrassed expression.

However, as the technical adviser of the delegation, he did not have decision-making power, so he turned his head and looked at Rosie Colombo and Anne Valette sitting in the middle with inquiring eyes.

Although French Aerospace and Airbus also sent representatives to participate in the negotiations, as Huaxia Airlines' peers and competitors to a certain extent, they obviously played a greater role than Fenmecanica and JAA in this cooperation-based negotiation, so these two people are the core members of the delegation.

It's just that even for Colombo, which has participated in the whole process of the Xinzhou 60 icing test, the amount of information that was exposed to tonight was indeed a bit large.

If what the Chinese said was true, then their research in the field of icing and anti-icing has even gone ahead of the Americans.

They had not thought about the matter of opposing the army before, and naturally they were unprepared for the relevant negotiation conditions.

In addition, neither Colombo nor Valette are full-time technicians, so they can only have some understanding of SLD-related fields, and it is impossible to make decisions on the spot.

So the two looked at each other, and they both saw the same meaning in each other's eyes.

"With regard to the idea that your delegation has just raised, we need to report to the European headquarters, and we are not in a position to give an accurate answer for the time being."

After being shocked by Chang Haonan's slap, Vallet's tone was no longer as sonorous and powerful as it was at the beginning.

Her statement was about preparing to conclude the current round of negotiations.

Considering that the things that the two sides want to discuss are no longer on the same level, and Huaxia also needs to confirm some technical details with Chang Haonan and Lin Guofan, this is actually the only way out.

It's just a matter of seeing which side can't hold back first in the end.

Now that the European side has taken the initiative, it is naturally the best.

And so the first round of negotiations came to an end.

Naturally, there was a dinner party that had been arranged long ago.

Although after determining the reason for the other party's request for cooperation, Huai Guomo and others had a lot of questions to consult Chang Haonan and Lin Guofan, they still had to go through the process.

During the dinner, in addition to his old acquaintance Colombo, Chang Haonan also chatted with that Fernando Lorenzo, and learned that the other party was a professor from the Ecole Nationale de la Ponte de Paris, whose research direction was fracture mechanics and fluid mechanics.

French universities are more arbitrary when naming them, although this national road and bridge school sounds like a junior college, but it is actually one of the top 100 science and engineering universities in the world, and in the 90s, it was ranked higher than all schools in mainland China.

"Chang, have you built an icy wind tunnel like NASA?"

Lorenzo was clearly still interested in the research Chang Haonan had just mentioned.

"Professor Lorenzo, icing wind tunnels like the Lewis Center are really important, but the main role is to test the aerodynamic characteristics of the icing airfoil, whereas our current research is more basic, starting with the process of the supercooled droplets hitting the surface, and deducing the whole process of icing."

Chang Haonan picked up the wine glass containing white grape juice with one hand, and gestured a few times in mid-air with the other hand:

"Due to the limitations of current wind tunnel technology, the impact parameters that can be obtained from the experiment, the scope that can be carried out, and the versatility of the research method are limited, so in this field, we mainly rely on computational fluid dynamics techniques for numerical analysis and test flights for key research conditions."

"Test flight ...... directly after numerical calculation"

Lorenzo's face was full of incredulity:

"Wouldn't that be very dangerous?"

"It's dangerous."

What the old professor didn't expect was that Chang Haonan directly admitted this:

"Therefore, we will first select the most reliable working conditions for test flight, and after verifying that the simulation results in this range are correct, we will gradually increase the severity of the test flight environment."

This series of answers is half true and false, even if Lorenzo goes to Colombo for verification later, it is impossible to see anything boring.

For example, they have actually only carried out test flights in the 100-micron supercooled droplet environment before, but the theory that Chang Haonan and Lin Guofan have previously concocted can indeed predict the icing situation under SLD conditions more accurately, but some theories and assumptions need to be adjusted.

I didn't go to the test flight just because SLD actually belongs to a very extreme climate, and it is basically rare in a century in China.

It is not impossible to adapt the aircraft to such conditions, but it is necessary to start from the airfoil to the skin material to the anti-de-icing device, the cost is extremely high and affects the performance of the aircraft.

In fact, this is exactly what was common in later generations.

It's just that now since the FAA wants to take out SLD as a bargaining chip 15 years in advance, Chang Haonan doesn't mind giving them some small oriental shocks.

(End of chapter)