Genius is just the threshold for me!

"Lin Dong..."

Seeing that the engine's diameter had noticeably increased and that it had split into two sets of air intakes, Xu Qingling asked curiously, "Why is this engine different from the previous one? Are there a pair inside?"

"This is a parallel layout design of the variable cycle engine. The supercharged engine has a different air intake than the previous engine. Each air intake corresponds to one engine."

Previously, it used a series-connected variable-cycle engine design, with all engines sharing a single air intake. Through internal geometry and moving parts, the internal shape was adjusted according to the flight mode to direct airflow to different engines.

Lin Dong explained the structure to Xu Qingling: "Our Hot Spicy Ship has a relatively small fuselage size, which limits the length of the engine."

To increase the layout of the supercharged engines, the only option is to connect them in parallel.

The concept of variable cycle design dates back to the last century, and the SR-71 "Blackbird" reconnaissance aircraft used a similar improved design.

Because it can adapt to different flight speeds in all directions, the overall efficiency of the engine can be greatly improved. Since the beginning of the 21st century, countries have increased their research investment in this area.

For example, in 03, the United States launched the Falcon project, a hypersonic engine powered by hydrocarbon fuel. The prototype had already completed ground testing in 09, and the project was delivered around 2016. However, in the end, only the engine was produced, without a hypersonic fuselage.

According to the domestic timeline, research on this didn't begin until 2015, and test flights were completed in 2019...

However, Lin Dong, driven by his passion for mechanical engineering and wanting the Hot Spicy Ship to fly farther, had already produced a finished product of this engine design ahead of time...

"Xiao Dong!"

At this moment, Jiao You, who was listening to Lin Dong's explanation to Xu Qingling, couldn't help but pause for a moment: "This uses a parallel design. Isn't it more difficult to use a series design for a supercharged engine?"

Simply put, a variable loop engine is a combination of multiple engines.

However, because different engines are suited to different speed ranges, the internal air intake must also be adjusted accordingly. When the aircraft reaches a certain speed, the air intake must be directed to the corresponding engine components.

The engine layout is further divided into parallel layout, where each engine has an air intake and each engine works independently with less mutual interference, making it relatively less technically challenging.

The disadvantages are that it has a relatively large diameter, a relatively large weight, and a relatively large frontal area and aerodynamic drag.

Another type is the tandem layout previously used by Lin Dong, where all engines share a single air intake and the airflow is directed to different engines through an internal adjustment mechanism. This results in a more compact structure with a smaller frontal area and lighter weight.

The downside is that the design is quite difficult, especially the intake aerodynamic design when switching engines, and engine thermal management is also a core challenge.

Lin Dong's "Hot Spicy" engine now incorporates three different types: a small turbofan, a turbojet, and a ramjet, making its design incredibly complex...

Jiao You originally thought that Lin Dong had chosen to connect the super-burning engine separately in parallel because the design and engineering difficulty of connecting a fourth super-burning engine in series was not feasible.

But now it seems the reason is different from what he expected...

"Uncle Jiao, it's a bit difficult."

"But this is essentially a matter of design optimization; it doesn't involve uncharted technological territory, so the difficulty isn't too great..."

Lin Dong replied with a smile, "The main reason for using a parallel solution is that the size of the 'Hot Spicy' brand has reached its limit; increasing the size further would be a huge undertaking."

The Hot Spicy's current length of over 7 meters is already at a limit; increasing the size further would require a complete overhaul of the fuselage design.

At that time, the number of parts, the process, the design, the strength of the materials, etc. will all be upgraded by several levels, and the workload will be no less than that of the WZ-8 project.

Such a large-scale undertaking would not align with Lin Dong's personal interest in tinkering with gadgets.

"Since it doesn't involve uninhabited areas, the difficulty isn't too high..."

Jiao You's mouth moved as if he wanted to say something, but he ultimately held back.

Although he often called Lin Dong "Teacher Xiao Dong," he knew in his heart that Lin Dong was exceptionally talented.

But the sheer brilliance of this answer still exceeded his expectations...

After looking around for a while, Lin Dong realized he couldn't go in, so he stopped standing outside as a doorman.

He led Xu Qingling to a seat, and they found some sunflower seeds, potato chips, and cola that Xu Ziming had left there. The two of them ate snacks and chatted.

Time passed, and Xu Ziming was busy until after seven o'clock before the two engines were finally assembled. He didn't open the door here, but changed his clothes from the other side and came out.

"Lingling, let's go back."

Xu Ziming ignored the few guys who had been getting in his way, wiped his sweat, and greeted Xu Qingling, who was still whispering to Lin Dong.

"ah."

Xu Qingling looked up and asked curiously, "Dad, don't we need to test drive the engine?"

She came along to see the pre-cooled hypersonic engine last time. When the final assembly was completed, Xu Ziming took it to test drive.

"The supercharged engine cannot be tested on the ground yet; we have to wait until it is installed on the fuselage tomorrow before we can test it."

Xu Ziming shook his head: "Ask Xiao Dong for details."

Everyone has their own expertise, and his understanding of supercharged engines was only superficial.

Such specialized knowledge can be completely misunderstood with just a single word.

Therefore, he never pretends to know what he doesn't know when it comes to professional issues, so as not to mislead his children.

"Because scramjet engines, like subsonic ramjet engines, have no blades or starter motors, they cannot start at zero speed on the ground. They need to rely on Mach 5 to strike the wind and start ramjet."

Seeing Xu Qingling looking over curiously, Lin Dong gestured with his hand to mimic the action of airflow rushing into the engine, and explained with a smile, "If we wanted to start the car on the ground for testing, we'd have to take it to the hypersonic wind tunnel, but that's unnecessary..."

The JF12 hypersonic shock tunnel is located at the Qian Xuesen National Engineering Science Experimental Base in the capital, thousands of kilometers away from Chengdu.

Although Chengdu Aircraft Industry Group can arrange it as long as you apply.

But such a long distance is not as fast as waiting until the engine is installed on the fuselage and taking off directly.

Anyway, there are other engine modes to fall back on, so even if the supercharged engine really has a problem, it won't completely go out of control. Besides, the engine he researched has never had a problem.

"We need to use a hypersonic wind tunnel to start it up..."

Xu Qingling's eyes gleamed, but then, as if suddenly remembering something, she asked with some surprise, "So how did Uncle Jiao and the others manage to complete their research and development experiments?"

"In the context of explosion, the more accurate description is detonation."

Jiao You took over the conversation and patiently explained: "By mixing hydrogen and oxygen together and igniting them in a sealed channel, a detonation wave of Mach 5 or higher is formed, which can complete the test of the supercombustion device."

The JF-12 hypersonic shock wave wind tunnel also uses this principle, but its wind tunnel is more complex, operates for a longer period, and is technically more challenging.

"Use an explosion?"

Xu Qingling asked incredulously, "Uncle Jiao, isn't this kind of experiment very dangerous?"

Jiao You chuckled in response, and after chatting for a few moments, everyone gradually prepared to head back.

Lin Dong and Xu Qingling went through a hidden door in the wall to Laboratory 78. Before they could leave, Xu Ziming, Lin Weiliang, Wang Xingguo, and Su Ruohua arrived.

The last rays of the setting sun shone through the laboratory window, casting the shadows of several people onto the wall.

"The first batch of lithium batteries produced by your uncle's company in cooperation with Dizi was completed last week."

Seeing that Lin Dong suddenly thought of something, Lin Weiliang earnestly explained the situation of the lithium battery: "The measured energy density of the battery is amazing, reaching 200 Wh/kg, which is almost double the current average energy density of 108 Wh/kg. Even the energy density of ternary lithium batteries cannot compare."

Equipped with the latest electronic control system and the latest motor from Shenzhen Dizi Company, this 3-ton large vehicle can achieve an actual energy consumption of 14.5 kWh per 100 kilometers in urban areas.

Furthermore, the puncture and destruction process can prevent ignition for an hour, and with the help of a high-efficiency liquid cooling system, the charging rate can reach 8C…”

"A 3-ton car, 14.5 kWh per 100 kilometers, and can still be charged at 8C... That's incredible!"

Wang Xingguo's eyes widened, and he clicked his tongue in amazement, saying, "So, a new industrial revolution is really on the horizon?"

"These parameters are alright, aren't they?"

Lin Dong smiled noncommittally.

The fact that they were able to produce finished products so quickly is what led him to suggest collaborating with Dizi on production to get the first batch of finished products out and catch up with the new car's development progress.

As for the manufacturers and lithium mines that have partnered with state-owned enterprises for mergers and acquisitions, integration and transformation will not be completed in a short period of time, and they will not be put to use until the second half of the year at the earliest.

of course.

Having witnessed the golden age of the new energy vehicle and energy storage industries in his previous life, and using a mobile phone with a 10,000 mAh battery every day, he didn't feel particularly amazed by this.

After all, this thing was something he had only worked on for two days and had people conduct half a month of testing. The joy it brought was nothing compared to today's super-powerful engine.

"Now we are continuing to integrate and improve the production line to expand production capacity. In addition, Xingdong Company has also obtained a new energy vehicle license."

Whether Lin Weiliang was genuinely indifferent to his son or simply used to his naturally calm demeanor, he continued, "The first new energy vehicle should roll off the production line around the middle of next year..."

"This is fine."

Lin Dong was now more certain.

He heard about the lack of progress and chaos in the new energy vehicle industry during that period even more than a decade later.

Therefore, they had to bring in Tesla as a catalyst, but now it seems that Xingdong Company can act as that catalyst on its own.

"However, the power grid needs to keep up," Lin Dong said, seemingly remembering something.

"That's reassuring. The battery technology has been finalized, and it will be confirmed at the annual meeting."

Wang Xingguo, who had attended the meeting before, said with a smile: "This year we need to complete the initial upgrade, and starting next year we need to fully keep up with market demand. These are mandatory tasks... Other relevant policies have also been issued."

Compared to market-driven industries, policy guidance and gradual promotion are still needed.

The power grid is a state-owned industry. As long as a mandatory target is set, the national power grid must take action.

Fortunately, due to the development of the green electricity industry and the construction and development of ultra-high voltage transmission networks in recent years, the power grid has long cultivated a highly efficient technical engineering team.

"That solves everything. With basic power infrastructure in place, policies in place, and breakthroughs in battery technology, the rest will be driven by capital and the market..."

Lin Dong smiled and nodded. After chatting for a few minutes, they walked out of the 78 Lab area, and naturally changed to everyday topics.

Lin Dong didn't join the adults; he and Xu Qingling stayed a few steps behind, whispering to each other.

soon.

The group left the outer base and returned to the family residential area.

By then, it was already dark, and the streetlights had come on.

Seeing that Xu Qingling was still following Lin Dong and showed no sign of leaving, Xu Ziming paused and called out, "Lingling, it's time to go home for dinner."

"Aunt Xia invited me over for dinner tonight, and I've already told my mom."

Xu Qingling looked up at Xu Ziming and said, "Dad, you go back first, and please take my schoolbag back with you. I'll go back after I finish eating and chat for a while."

talking.

Xu Qingling happily handed her schoolbag to Xu Ziming and followed Lin Dong into the elevator, chattering away.

???

Xu Ziming, holding his schoolbag, watched Xu Qingling walk into the elevator and disappear from sight, completely stunned on the spot.