Genius is just the threshold for me!

Ok?

Xu Ziming, who had just taken a couple of bites of cake, paused for a moment when he saw the file folder in Xu Qingling's hand.

"Dad, this is from Lin Dong. I just forgot about it when I brought it back..." Xu Qingling was still too embarrassed to call her parents Dong Dong, so she used Lin Dong's name instead, and handed the file bag to Xu Ziming.

"What is it?"

Looking at his daughter's expectant eyes, Xu Ziming knew there was no escaping it. He turned to Lin Dong, who was eating cake, and said, "Xiao Dong, I still have to work overtime to deal with the process and technical issues of the bombing project..."

"Uncle Xu, it's just a small problem."

Lin Dong smiled and said, "I can't solve the material and manufacturing process issues for an engine combustion chamber."

"The manufacturing process of the engine combustion chamber?"

A hint of doubt flashed in Xu Ziming's eyes. He put down the cake fork, picked up the file folder, pulled out the documents inside, and saw the title "Rotating Explosion." His expression immediately fell silent...

"What's wrong? As for the engine combustion chamber, why don't you just make one for Xiao Dong?"

Seeing Xu Ziming's expression, Zhou Xiaoyan asked with some doubt, "Is this difficult?"

"It's not a question of whether it's difficult or not."

"It's not just a matter of concept; it's a global issue."

Xu Ziming gritted his teeth, took a deep breath, and opened the file to carefully read through it.

Upon seeing the process parameters and thermal expansion control coefficients, especially the heat flux coefficient that was ten times more intense than that of a rocket engine, he finally couldn't help but turn to look at Lin Dong.

"Can we really develop this kind of detonation engine technology, involving materials and processes, before we land on Mars?"

"I've done the calculations, and the combination of this active ablation layer and the tantalum-hafnium carbide composite layer can solve the combustion chamber problem by 90%, increasing the lifespan to over 1000 hours."

Even if it can't solve the problem, it can at least give the combustion chamber a lifespan of 300 hours.

Lin Dong nodded: "The active ablation layer can last for 100 hours, and the tantalum carbide-hafnium composite layer + liquid cooling technology can last for 200 hours."

With the physics of the combustion chamber solved, I can then work on the remaining detonation wave control and other engine designs step by step…

His current scientific research capabilities stem from his knowledge, coupled with his ability to perceive the soul visually.

I'm not afraid of technical difficulties, nor am I afraid of not finding a direction. What I'm afraid of is that every direction I find will be blocked by problems at the level of physical laws.

The combustion chamber of a rotary detonation engine is a problem that is close to the laws of physics.

The detonation heat flow is ten times more intense than that of a rocket engine combustion chamber, coupled with seven or eight or even more detonation impacts per second. No material in the world can withstand its devastation.

Because different materials have different properties.

Tantalum carbide hafnium is a ceramic material that can withstand high temperatures, but ceramics cannot withstand detonation impacts, so it must be combined with other materials.

However, when different materials are combined, each material has a different coefficient of thermal expansion.

Under such terrifying temperatures, the material bonding surfaces will separate, tear, and crumble due to their uneven expansion.

Therefore, the challenge of the entire solution lies in establishing a sufficiently robust bonding surface that can withstand differences in the thermal expansion coefficients of the materials themselves.

Lin Dong has been studying it in his spare time every day for the past few months.

Ultimately, it was determined that with current technology, there was no solution that could withstand the expansion and tearing caused by the material's own coefficient of expansion.

Ultimately, they had to settle for a buffer solution.

A structural base layer, then a high-temperature resistant gallium-based alloy liquid metal layer, then a high-temperature resistant tantalum-hafnium carbide layer, and finally an active ablation layer...

In this way, the liquid metal layer can act as a buffer to offset the different expansion forces of the two materials.

At the same time, gallium-based alloys themselves have an amazing thermal conductivity, which can be used to create a special liquid cooling solution...

Lin Dong originally thought the third sweating program was the most promising.

However, after some experimentation, 624 determined that this solution would not solve the carbon buildup and blockage problem unless they abandoned kerosene, a hydrocarbon fuel, and switched to pure hydrogen fuel.

"I'll give it a try. This combustion chamber design has even higher process requirements than the precooling device."

Xu Ziming remained silent for two seconds, looking at his daughter's earnest and expectant eyes, and finally did not refuse.

Under the continuous impact of detonation, these connecting structures and the nodes of tantalum carbide and hafnium cannot withstand the pressure for long and will become weak points due to thermal expansion. A full gallium-based alloy liquid metal layer is necessary in the middle as a buffer and support.

As for the circulating cooling of liquid metal, it can be achieved through an external pressure pump, establishing multi-channel extraction and multi-channel injection. As long as the fluid flow model is established, that's your forte...

"Oh, I see, Uncle Xu. I'm not very familiar with the specific process..."

Lin Dong leaned over for a look, and immediately realized what was going on, his expression conveying a great deal of emotional value.

"You can notice it if you look closely..."

Xu Ziming's lips curved slightly.

But the next second, he realized what was happening, his eyes widening as he glared at Lin Dong: "You brat, do you think I'm that slow-witted? Are you trying to fool me like your dad, Lin Weiliang?"

"puff--"

Zhou Xiaoyan, who was sitting next to Xu Qingling, listened to their conversation. When she heard this, she couldn't help but laugh and patted Xu Ziming, saying, "Your achievements are not as good as Brother Lin's."

"He's his biological father, how can it be the same?"

Xu Ziming said irritably, then waved his hand at Lin Dong, urging him to leave, "I'll take this document. There's nothing else. Hurry up and go home. It's almost nine o'clock, and we need to go to sleep."

Lin Dong smiled, stood up and said, "Uncle Xu, Aunt Zhou, I'll head back now."

"I send you."

Xu Qingling immediately stood up and ran happily to Lin Dong's side.

Zhou Xiaoyan watched the two leave, patted Xu Ziming and whispered, "Xiao Dong went to a lot of trouble to coax you. You just went with the flow when you found out. Why did you have to tell everyone?"

"You're a researcher too, do you think it's easy to leave a problem in a plan that gives you face without ruining the overall design?"

Although she had been removed from the core program for many years, Zhou Xiaoyan was still aware of these research plans.

It is clear how difficult it is to leave a subtle loophole that can be discovered without changing the overall structure.

"Do I need him to coax me? You think it's difficult, but this kid doesn't even need to think about it."

Xu Ziming said irritably, "He's so young and already learning this kind of thing. Lingling has corrupted him. She would never have helped this kid get these documents for me before."

"Yes, no need to coax me. If you're so capable, you should have been able to hold back your laughter just now."

Zhou Xiaoyan suppressed a laugh and reminded her, "Also, your daughter started helping you get documents when she was eight years old."

"You forgot, the first laser mosquito swatter control base that Xiaodong made was given to you by your daughter and asked to be made."

"I--"

Xu Ziming opened his mouth, but in the end he got up helplessly and said, "I'm going to take a shower. Once this kid finalizes the plan for the Great Bomb these next two days, I won't have time to rest... Having a daughter is such a sin."

"Aren't we taking this document in?"

Zhou Xiaoyan pointed to the documents on the table: "Remember to change the ones Xiaodong used to coax you into doing, don't use them..."

"Understood." Xu Ziming picked up the documents and walked into the room.

"Don't laugh to yourself."

"Am I that kind of person...?" Xu Ziming's voice came through, but his tone was noticeably lighter.