Chapter 738

In the afternoon, five o'clock.

The end of the college entrance examination mathematics.

It didn't surprise anyone.

This year's candidates were made to cry by Gu Lu again.

One by one, the candidates sobbed and walked out of the examination room.

The reporters were interviewed first-hand.

And put it online.

on the web.

Netizens are still a happy scene.

After Uncle Gu joined the college entrance examination mathematics proposition group, everyone found out that the college entrance examination would be so interesting.

Especially for those who are already in college and into society.

"Younger students, don't be too sad, as a freshman senior, as a senior, as a person who has come over, tell you not to leave too many tears now, it's not worth it, because wait until the day the college entrance examination results are out in a month, you will understand what real despair is!"

"Isn't it just that the topic is difficult, what is this, students, remember one sentence, in the wind and rain, we are waiting for you at the construction site!"

"This year's college entrance examination is not hard, September Lanxiang is a brother, everyone, we Lanxiang welding professional sincerely invite everyone to join!"

"I'm curious what is the average score in mathematics in this year's college entrance examination?"

"I bet it won't be more than forty. ”

"Uncle Gu: Even if you take the test, if you pass, I will lose!"

"Hahaha, I'm glad to hear it, I'm glad to see it, fortunately my parents gave birth to me a few years earlier, otherwise I might have to endure some inhumane torture during the college entrance examination!"

"Meizizi, the senior sister licked the ice cream in the air-conditioned room, looking at the crying of this group of learning girls, expressing great joy. ”

"Guys above, don't be too happy. Yes, you were born at a very good time, you missed the era of Uncle Ge, and you did not meet the era of Uncle Gu, but what about your children! Don't forget, Uncle Gu is only in his twenties this year, and when your children take the college entrance examination, maybe Uncle Gu will not be 50 years old, and he will still be the leader of the college entrance examination mathematics proposition group! The debts you owe will be repaid by your children. ”

", why didn't I think of this! No, when you pay public food to your daughter-in-law in the future, you should pay attention to safety issues, so as not to kill people and harm children!"

"As a single dog so far, I am fearless!"

“…… Weakly asked, is it too late to have a fetus now?"

Maybe what Gu Lu himself didn't expect was this.

Because of him.

The fertility rate in China has dropped a lot in recent years.

…………

The college entrance examination is officially over.

The heat of the college entrance examination, a major event that the whole people are concerned about, has gradually subsided.

The hot search list is once again occupied by the lace news of some celebrities.

However, a topic called #Uncle Gu, please spare your life# has been in the top ten of the hot search list for a week before it fell full.

Nowadays.

In the entire Chinese mathematics community, Gu Lu is the most famous figure.

Perhaps only Hua Luogeng, Chen Jingrun and others at their peak can stabilize Gu Lu in terms of popularity.

But Gu Lu is famous.

It is not because Gu Lu is a once-in-a-century mathematical genius in the Chinese mathematics community, and it is not because Gu Lu is the first person of the younger generation in the Chinese mathematics community.

It's because of Gu Lu's identity as the leader of the college entrance examination mathematics proposition group.

For three consecutive years, millions of candidates have been killed.

Gu Lu has already achieved the achievement of triple kill.

in China.

At least for the next twenty years, no one will forget the name Gu Lu.

And at the same time, the other side.

A rocket R&D base located deep in the mountains of Dongchang.

Of course, Gu Lu, who cut off any contact with the outside world, did not know about these things that happened on the Internet.

At this stage, Gu Lu is devoting himself to the research and development of liquid oxygen and kerosene engines.

The liquid oxygen kerosene engine is a big thing.

The weight is generally around five to ten tons.

And this type of liquid oxygen kerosene engine designed by Gu Lu has a terrifying weight of 11 tons due to its many structures.

In the R&D workshop of the liquid oxygen kerosene engine, Gu Lu was sitting on a chair and revising the engine drawings on the table.

The engine designed by Gu Lu has a total of 4 combustion chambers, a turbopump and 2 pre-combustion chambers.

The turbine pump is single-stage, and the whole turbine pump system also includes an oxidizer pump and a two-stage fuel pump, and the whole system is connected with a low-pressure fuel pump and an oxidizer pump, and the propellant is pressurized to prevent the turbine pump from forming cavitation, thereby preventing the appearance of combustion instability.

The turbine pump is driven by a high-pressure gas formed after combustion in two oxygen-rich pre-combustion chambers.

At first, Gu Lu originally planned to use only one pre-combustion chamber.

But in this way, 1.5 tons of propellant need to be burned per second, which is too much flow.

Afterward.

Gu Lu increased the pre-combustion chamber to two, so that the flow rate could be kept within a reasonable control range.

In the entire cycle of oxidizer and kerosene in this engine designed by Gu Lu, only a small part of the propellant passes through the pre-combustion chamber, accounting for about 6%.

The turbopump produces about 257,000 horsepower, which is equivalent to nearly 10 million newtons of thrust.

The engine designed by Gu Lu can throttle to 50% of the rated power and is equipped with a universal joint-steering device, which is actuated with the help of 8 hydraulic actuators and can swing along 2 axes.

Therefore, the engine designed by Gu Lu had to consider the reliability of these 8 hydraulic actuators, and it was necessary to prevent air from entering the arrow body through the rotary joint, so a powerful drive was used to prevent the aerodynamic pressure.

This involves a very complex dynamical model.

However, Gu Lu has used the construction of the model to solve all these problems.

And according to the model engine involved in the drawings, there were no major problems when it was burning.

What Gu Lu is currently doing is just assembling the liquid oxygen and kerosene engine on the pattern.

It's not a very easy job.

Because every part of the engine is just too heavy.

Even with the assistance of a crane and a robotic arm, it was quite difficult to install.

But fortunately.

It's not a technical job.

The various data parameters of the liquid oxygen kerosene engine have been fully designed on the drawings.

Gu Lu only needs to assemble it according to the brainless design on the drawings.

Even in a sense.

It's easier than building a desktop computer.

"This pressure pump should be installed in the place where the pipeline connects the pre-combustion chamber, and this secondary pre-pressure pump is installed on the pipeline connecting the pre-combustion chamber and the combustion chamber......

Gu Lu was thinking about something in his mouth, and continued to install it regardless of the dirty environment around him.

At this time.

It happened that Director Nie of the workshop was passing by.

Gu Lu stopped Director Nie.

"Professor Gu, is there something wrong?" Director Nie stopped.

"Director Nie, can you call Director Bi here? Gu Lu grinned, revealing a row of neat white teeth.