Genius is just the threshold for me!

Chapter 106 Pre-cooled Engine Technology

"I didn't expect that."

Lin Dong shook his head and sighed: "The J-20 fighter jet thing will happen to me."

The J-20 fighter jet project was a grueling effort, with a number of key personnel losing their lives. The design and manufacturing of the entire airframe and all systems were completed in 2010, and the maiden flight was completed in 2011.

However, the progress of the WS-25 high-thrust engine is seriously delayed. The engine, which should have been developed and completed simultaneously, has not yet been put into service, resulting in the fifth-generation fighter jet having to use the engine of the fourth-generation fighter jet. It was born with a heart disease.

Now his own brand-new Hot Hot is facing the same problem: the fuselage design is about to be completed, but the engine design is still nowhere in sight.

After complaining for a while, Lin Dong opened the blueprints for the Hot Spicy Supercharged Engine, looked at the missing parts, and shook his head after a long time.

"It will still take more than two years."

There is very little research on supercharged engines in the world right now, and almost none in China. So every step is a breakthrough in uncharted territory, and it's impossible to speed things up.

The limitation is not a lack of time, but a matter of energy.

Because we are breaking through uncharted territory, every step must be verified using the power of spiritual vision.

He only has so much mana and energy each day. Although the more knowledge he acquires, the more powerful each bit of mana and energy becomes, it's still a drop in the ocean in a short time.

Over two years, he independently completed the theoretical and miniaturized design of a supercharged engine.

He's already a Superman from M87; any faster and Earth won't be able to stay alive.

"You're still young. If you grow up, you can reveal your identity and directly use the industrial Cthulhu's grand scientific research scheduling technique to command millions of scientific research workers across the country to participate. You just need to provide a direction and act as the helmsman..."

"This way, increasing the progress by 40% is not a problem, and we will also have extra energy to break through other uncharted technological frontiers."

Lin Dong sighed.

Although we can let our godfather and the others take over.

But it's clear that the supercharged engine is too complex, and none of them can handle it; they can only study it slowly on their own.

The Superburning Engine was clearly not going to work. Lin Dong took a piece of paper and thought about which engine to use as a backup for the new Hot Hot Air fuselage, and then replace it with the Superburning Engine once it was completed.

Anyway, let's see how it actually goes first.

Otherwise, it would be tempting to just look at a completed fuselage every day without a single engine capable of flying it.

"The only engine that can meet the requirements of hypersonic flight is this one, apart from scramjet engines, detonation engines, and rockets, which are technologies that cannot be solved in a short time."

Lin Dong reflected on the technological concepts of later generations and the current level of industry, thought for two minutes, and wrote down three words on a piece of paper.

——Pre-cooled type!

Pre-cooled engine technology was proposed in the 50s, began to be tested in the 80s, and has been studied for practical application by various countries in the last two years. More than a decade later, it is regarded as one of the standard technologies for various hypersonic aircraft and aerospace vehicles.

This is a universal technology that can be adapted to the engineering solutions of all jet engines.

The biggest obstacle to the Carlo cycle jet engine is high temperature, and its biggest source of power is also high temperature.

Only when the internal temperature is sufficient to create a adequate temperature and pressure difference can the gas flow smoothly from the intake manifold to the tailpipe, completing the jetting and power generation.

In this situation, for every 100-degree Celsius increase in the temperature in front of the turbine, the engine efficiency can be increased by about 5%, and the thrust by about 3%.

However, if the high temperature occurs at the intake end instead of in front of the turbine, it will cause a series of malfunctions and efficiency problems.

When an aircraft flies at hypersonic speeds, the outside air rushes into the air intake and is heated to thousands of degrees Celsius due to compression.

This high intake temperature can cause the intake air to expand, reducing the intake volume, and may even cause thermal blockage, blocking the intake.

In addition, high temperatures can weaken the strength of the compressor blades, limit the upper limit of the speed, reduce the internal temperature difference, and significantly reduce the efficiency of the engine.

This is why the efficiency of conventional turbofan engines drops drastically when they reach Mach 2, necessitating the use of turbojet engines.

At Mach 3.5, a ramjet engine is needed, and at Mach 5, a scramjet engine is needed – one of the reasons for this.

Pre-cooled engine technology is a technology that solves and improves this problem.

By adding a highly efficient radiator at the intake end, it can reduce the intake temperature from thousands of degrees Celsius to below zero degrees Celsius.

In this way, all the above-mentioned problems can be greatly improved, or even solved.

To put it more vividly...

A conventional engine is like an ordinary person running; once you reach a certain speed, your cardiopulmonary function reaches its limit and cannot be improved further.

The pre-cooling technology transforms ordinary people's cardiopulmonary respiration into a combination of marathon champion Savile's and sprint champion Bolt's cardiopulmonary respiration...

"If a pre-cooling device is added, the current variable ramjet engine of the Hot Hot can be improved."

So the normal cruising speed can be increased to Mach 5.4, the acceleration can be increased to Mach 6.5, and the top speed can reach about Mach 7.8…”

Lin Dong carefully checked the calculations for three minutes, and looking at the calculated data, a hint of satisfaction appeared in his eyes.

While this speed parameter is far inferior to the still-under-design Superburning Engine, it can be used as the engine for the Hot Spicy for the time being.

This is a revolutionary change compared to the previous engine, which had a top speed of Mach 6, a cruising speed of Mach 3.2, and an afterburner speed of Mach 4.

More importantly, although a pre-cooling system was added.

However, because both overall efficiency and thrust have improved, the engine's thrust-to-weight ratio has increased rather than decreased, rising from approximately 9.8 to 9.91...

"With its twin-engine configuration and the brand-new Hot Aircraft fuselage, it can cruise at supersonic speeds at high altitudes throughout the entire flight, and a range of 6000 kilometers is no problem..."

Lin Dong took a deep breath and began to think about how to manufacture this thing.

Pre-cooled engine technology was conceived more than half a century ago and laboratory research began in the 1980s.

However, it wasn't until more than a decade later that practical research began. This was not due to anything else, but simply because the process requirements for this thing were too demanding.

There is no revolutionary technology involved, and it does not require breaking through uncharted technological frontiers; it is simply a general-purpose system integration solution.

As long as the parameters of the entire system are balanced, frost and blockage at the air intake are avoided, and the system matching problem of different working fluids is solved.

With his imperfections in visual perception and balance, the entire design scheme posed no challenge to him whatsoever, and he could complete most of it in three days.

The real challenge was finding someone to manufacture and assemble the project, turning the blueprints into a real device.

If, more than ten years from now, you can find a company on the market to manufacture this product if you have the money.

It's 2012 now, so the only option is to go to a laboratory.

Moreover, it is a laboratory with relatively advanced technology.

"The foreign SABRE scheme, which does not use liquid helium as a coolant and liquid hydrogen as a heat exchanger, does not use a closed-loop circuit."

Referring to the RATR program in China in later generations, it is only necessary to replace ordinary kerosene with heat-absorbing kerosene used in some rockets today as both coolant and fuel.

Although this method only cools the temperature to 20 degrees Celsius, it is not as powerful as the SABRE method which reaches -100 degrees Celsius.

However, the system complexity will be reduced by two-thirds, the process requirements will be greatly reduced, and the risk of air intake frost blockage will also be reduced.

Most importantly, this way manufacturing and assembly can be completed in Chengdu Aircraft Industry Group's final assembly workshop... Hmm, that's it. Let's get an overall structural diagram done first.

Lin Dong had a series of ideas flashing through his mind, and finally decided on a plan. He picked up the keyboard and mouse and began to design.

To reduce the intake air temperature from over a thousand degrees Celsius to tens or even below zero degrees Celsius within a tenth of a second, the conventional compressor and air heat exchanger design of household air conditioners are definitely not feasible.

The mainstream approach adopted in later generations.

One is the SABRE scheme from abroad, which uses liquid helium in a closed loop, and then uses liquid hydrogen for heat exchange. The liquid hydrogen absorbs heat and turns into hydrogen gas, which is then injected into the combustion chamber as fuel.

One option is the domestic RATR scheme, which uses endothermic hydrocarbon fuels, also known as endothermic aviation kerosene.

At a critical temperature of 1,000 degrees Celsius, this fuel rapidly absorbs heat and decomposes into various forms of methane, hydrogen, etc., which are then injected into the combustion chamber as fuel.

Only by using cryogenic media such as liquid hydrogen and liquid helium, and by using chemical pyrolysis to absorb heat, can the heat exchange requirements of pre-cooled engine technology be met.

"Xiao Dong, aren't you done yet?"

Time passed, and it was past nine o'clock in the evening. Zhang Xiali had returned from working overtime at the base and saw Lin Dong still in the living room. She couldn't help but ask him a question.

"That's about it. I'll go to Uncle Xu's house later. Tomorrow's the weekend, so I can stay up a little later."

Lin Dong looked up at Zhang Xiali: "Mom, you finished working overtime so quickly?"

"The drones from this exercise still have some that need to be put into inventory for asset verification. They need to be sent to Guangxi Province tomorrow morning to verify the total amount. It will be completed in a few tens of minutes."

Zhang Xiali gave a brief reply, and as she walked towards her room, she instructed Lin Dong, "What are you doing at your Uncle Xu's house so late? If it's not something urgent, go tomorrow. Be polite and courteous."

"Everyone's in the next building. Xu Qingling came to chat with you around this time on Saturday, but that's not what you said..."

Lin Dong replied subconsciously.

But seeing Zhang Xiali suddenly stop, he quickly changed his mind and said, "I know, it's not urgent. It's just that I need to deliver something to Uncle Xu. I'll go tomorrow."

"That's right. Your father and I won't mind if Qingling comes to our house at this time, but if you go over there so late, your Uncle Xu will definitely be unhappy with you, so you have to be careful..."

"Okay, Mom, you go and rest. I'll go to sleep after I finish this."

Lin Dong decisively ended the topic, moved the mouse to input parameters, completed the last detail of the overall structure diagram, entered the name and inventor, and then printed it out using confidential paper.

Crunch, crunch—

Internally manufactured, classified printers creaked and spewed out sheets of paper, the top cover of which boldly proclaimed—

On a System Solution for a Universal Intake Precooling Device for Jet Engines – Xu Ziming