Chapter 744

In terms of the structure of the engine nozzle, Gu Lu decided to abandon the traditional bell-shaped nozzle and adopt a new pneumatic plug nozzle.

Compared to the traditional bell-shaped nozzle, the pneumatic plug nozzle can dynamically adapt to different atmospheric pressures, and can save 25-30% of propellant at low altitudes.

For a single-stage spacecraft in orbit, this savings are significant, as it can reduce a lot of the weight burden on the engine.

That's the case.

The problem of excessive volume of liquid hydrogen fuel will be solved a lot.

According to this idea, Gu Lu designed several sets of drawings of liquid hydrogen and liquid oxygen engines.

But.

After the drawings of the engine were designed, there was another problem that needed to be solved urgently.

That's the issue of the engine's casing material.

Due to the temperature of the fuel, as well as the pressure and pressure in the vacuum, the requirements for the housing material of the engine are almost quite demanding.

And for now.

Huaguo has not yet found a very suitable material to use as the casing of liquid hydrogen and liquid oxygen engines.

It is only possible to apply thermal insulation coating to the machine shell by using a very original method.

However, this method of applying an insulating coating may also be suitable for some liquid hydrogen and liquid oxygen engines with less vacuum thrust.

However, for the high-thrust liquid oxygen kerosene engine required by the Long March 9 launch vehicle, simply applying thermal insulation coating is not at all useful.

At this time.

It is necessary to find or develop a new type of material to be used as the casing material of liquid hydrogen and liquid oxygen engines.

The focus of Gu Lu's next stage of research lies in this aspect.

Regarding materials research, the Physical Materials Laboratory of the Chinese Academy of Sciences is the No. 1 in China.

Thereupon.

Gu Lu said hello to Director Bi and prepared to go back to Yanjing.

The college entrance examination has passed, and Gu Lu's state of imprisonment has long ended.

Coupled with the improvement of Gu Lu's status on the side of the rocket base.

Therefore, as soon as Gu Lu made this application, Director Bi happily agreed.

Packed my bags.

Gu Lu got into the special car of the base and returned to Yanjing all the way from Dongchang.

............

When Gu Lu returned to Yanjing this time, it was already September.

Do a rough math.

Gu Lu had been away from Yanjing for five months.

Gu Lu didn't rush to the Chinese Academy of Sciences as soon as possible.

It doesn't matter if this kind of thing is a day or two at night.

Gu Lu went back to Yan University first.

Yan gate.

Gu Lu stepped into the campus after a long absence.

Then.

Gu Lu took a deep breath and walked towards the building of the Academy.

Knock knock~~

At the door of the vice president's office, Gu Lu knocked on the door.

"Please come in!"

Bao Songquan's neutral voice came from inside the door.

Gu Lu directly pushed the door in.

Bao Songquan was originally curious about who the person who knocked on the door was, but as soon as he looked up and saw that it was Gu Lu, Bao Songquan immediately stood up excitedly, laughed and gave Gu Lu a hug.

"Gu Lu, you're finally back!"

Bao Songquan sighed with emotion, invited Gu Lu to sit down on the sofa, and poured a cup of tea for each of them.

"When did you come back, why didn't you inform me?" asked Bao Songquan with concern.

"I just came back today, and I came to your side as soon as possible. Gu Lu smiled slightly.

"Done with work over there?" Bao Songquan raised his eyebrows and opened with his fingers crossed.

Bao Songquan didn't know exactly what Gu Lu was doing.

But Gu Lu has not participated in similar confidential work once or twice, and Bao Songquan has long been used to it.

"Not yet. Gu Lu shook his head slightly, "It is estimated that the work over there will take a long time, and it will not be done in a short time, and I can't tell when it will be over." ”

From Gu Lu's words.

Bao Songquan heard that Gu Lu was participating in a big project.

Otherwise.

According to Gu Lu's character, he would not say such a thing as 'it can't be done in a short time'.

Bao Songquan took a sip of tea, "Then why are you coming back this time?"

Gu Lu replied, "Oh, I'll go to the Chinese Academy of Sciences to do something, and I guess I won't be able to stay in Yanjing for a few days." ”

Bao Songquan nodded lightly, indicating understanding.

"Senior brother, during my absence, has anything happened in the mathematical world?" Gu Lu asked.

During the time he stayed at the base, Gu Lu lived a completely isolated life.

He hadn't been in contact with the outside world for five months, and Gu Lu seemed to be about to derail from this world.

At the mention of this, a faint smile hung on Bao Songquan's face.

"During your absence, a lot of things really happened in the world of mathematics......"

Bao Songquan slowly began to speak.

This year's mathematics community can be said to be the most lively year in the past three years.

The biggest reason for this phenomenon is the advent of the geometry-algebra-topology grand unification theory.

The advent of this unified theory has changed the fate of many mathematicians, and at the same time, the pattern of the entire mathematical community has become completely treacherous.

The three popular areas of mathematics are all integrated under a single theoretical framework.

It means that the boundaries between the three fields of mathematics are blurred.

The terms geometrician, algebraist, and topologist may gradually fade out of the stage of history over time.

Meantime.

The birth of this unified theory has also brought many mathematicians in these three fields to the same starting line again.

The geometric-algebra-topological grand unification theory is an unexplored fertile soil.

And it is also a fertile ground with great potential.

Whoever can take the lead in setting up camp on this fertile soil and separating one side may have a great say on the world mathematical stage in the future.

And so.

In less than half a year.

Almost all the universities in the world that can be called famous have set up research groups one after another, announcing their entry into the direction of geometry-algebra-topology unified theory.

Almost half of mathematicians in the fields of geometry, algebra, and topology began to devote their energies to the study of this theory.

Thereinto.

There are several bigwigs who have won the Fields Medal.

The influence of the geometry-algebra-topology grand unification theory can be seen from this.

Again, this is for the entire mathematical community.

As for the influence of the geometry-algebra-topology grand unification theory on the Yan University School of Mathematics......

With the continuous fermentation of time, and a large number of mathematicians have joined or stopped in the Yan University School of Mathematics, the Yan University School of Mathematics has faintly revealed the trend of becoming the center of the world's geometry, algebra and topology.

This trend is quite obvious.

Compared with.

In less than ten years, the name of the geometry-algebra-topology center of the Yan University School of Mathematics will be confirmed.

Other than that.

The improvement of the unified theory of geometry-algebra-topology has not only attracted many mathematicians to join the School of Mathematics of Yan University, but also attracted many outstanding overseas students to apply for the examination.

This year, the number and quality of overseas students in the School of Mathematics of Yan University have increased a lot compared with last year.