All over the world, any country that has the ability to launch rockets has experienced rocket launch failures.
Among them, rocket engine explosions are never uncommon.
However, the number of explosions in our country is definitely the least compared to other countries.
The reason why there are so few explosions is that our aerospace staff have high requirements for product quality day after day.
For example, at this moment, after hearing the explosion, Han Ming came to the base without any delay. After arriving at the place, he immediately began to analyze the cause.
If it were abroad, there would never be such speed and attitude.
In addition, there are technical reasons.
Subject to our country's capital investment in the aerospace field, our country's rocket development path has always been based on the idea of low cost and high reliability. It is basically the same path that the bald eagle and the furry bear have gone through and' The technical route of "elimination" is in line with the steady development idea of "small steps and quick climb".
The circulation method of rocket engines adopts the gas generator cycle, which has a simple and reliable structure.
The fuels are also undimethylhydrazine and dinitrogen tetroxide. The boiling points of these two substances are 63°C and 21.2°C. At room temperature, the states of these two substances are almost the same. It is in a liquid state, which means that fuel tank and engine materials do not need to experience low-temperature challenges and only need to consider high-temperature environments.
In this way, it becomes very simple to analyze the cause of the rocket engine explosion.
For example, structural instability or insufficient fuel combustion can be eliminated in the shortest time.
After observing the scene, Han Ming probably had several possibilities locked in his mind.
However, before he could say it, Wang Donglai expressed his guess in advance.
For a while, it attracted the attention of everyone present.
"Han Gong, I may have discovered something!"
Wang Donglai held the document in his hand and said to Han Ming in a very serious and confident tone.
Hearing Wang Donglai's words, Director Ding, Han Ming and everyone focused their eyes on Wang Donglai, with a searching look in their eyes, wanting to know what Wang Donglai had discovered.
"Academician Wang, what did you find?"
In fact, when he heard Wang Donglai say this, Han Ming's first reaction was that it was impossible.
He couldn't be sure, but Wang Donglai said that he had made a discovery. How long had passed since then?
The time is too short and it is simply impossible.
I thought so in my heart, but Han Ming didn't show it.
"Gong Han, the document in my hand contains various data about the Rockets. After I read it, I found that there was something wrong with the data in it."
"Then I analyzed the data , I judge that this explosion is not a problem with the engine quality or itself, but due to external factors.”
As soon as these words came out, everyone present was shocked and their expressions changed.
The meaning of Wang Donglai's words is already obvious.
Since it is not a problem of engine quality and fuel, it is an external factor.
Among the remaining possibilities, no matter which one it is, once it is found out, a problem will arise, that is, someone will take responsibility.
Thinking of this, Director Ding couldn't sit still and said, "Academician Wang, right? Can I ask you on what basis you made such a judgment?"
"Are you confident? Are you sure?"
Director Ding asked three times in succession. Although there was still a smile on his face, there was a sense of oppression invisibly.
If Wang Donglai's judgment is correct, then Director Ding, as the leader, will inevitably take responsibility.
So, Director Ding’s behavior was also expected by Wang Donglai.
At this time, Han Ming also spoke.
"Academician Wang, there are many reasons for rocket engine explosions, such as uneven fuel combustion, engine quality problems, or errors in the overall control system."
"The rocket engine is an extremely sophisticated product. , a problem at any point may lead to an explosion.”
“In the past, analysis of the cause of the explosion required analysis. Only through comprehensive analysis of the explosion site and judgment of the data can we eliminate the causes one by one and finally locate the cause.”
“Every explosion is a growth of technology and our progress, so it is not the case. Don't worry, in the process of finding the cause of the explosion, we are also reviewing the progress together."
Han Ming said a lot, in a confused way.
But everyone present was smart, so how could they not understand what Han Ming meant.
Such a lot of words are actually reminding Wang Donglai that the rocket engine explosion is an incident, which can be serious or not serious.
As long as we can find the problem, we can talk about anything.
There is a vague intention of patching up the next words of Wang Donglai.
Wang Donglai could also hear it, but he did not pay attention to it and continued: "Everyone knows that I study mathematics, so just now I immediately thought of using these data to study the cause of the explosion. ”
"Fortunately, I still have some talent in mathematics, and I have achieved some results."
Hearing Wang Donglai's words, everyone present was speechless.
If Wang Donglai is not talented in the field of mathematics, I am afraid not many people are talented.
So when they heard Wang Donglai’s self-effacing words, everyone was really speechless.
Wang Donglai didn't know that his casual self-effacing words would make everyone feel speechless when they heard them.
"I made a simple model through these data, and judged that when the rocket engine exploded, it was at the 15th second."
"So, I used some linear formulas to calculate , ruling out the cause of the explosion due to unstable engine combustion."
"The data is objective and will not lie. I have counted this document in my hand. According to the analysis, there is no problem with the overall control system of the rocket."
"The reason for the explosion is that I noticed a piece of data."
"After comparing the data before the explosion. After reading the rocket engine thrust data for seconds, I came up with a guess that this explosion may have occurred on the rocket engine.”
Hearing this, Director Ding couldn't wait to ask: "Academician Wang, do you mean that the cause of the explosion this time was because of the rocket engine?"
There was a trace of expectation in Director Ding's eyes, and A hint of relaxation.
Looking closely at Wang Donglai, waiting for his answer.
Facing Director Ding's expectant eyes, Wang Donglai shook his head gently and said loudly: "No!"
"Through the comparison of data, I noticed that the thrust force As a result, the changes were concentrated on the rocket engine. As I continued to analyze and compare, I also noticed a problem, that is, there was a shutdown signal before the rocket engine exploded."
"The cause of this explosion may be hidden in the shutdown of the rocket engine."
Wang Donglai expressed all his guesses.
Director Ding was a little disappointed, while Han Ming was thoughtful.
"Academician Wang, what you said did not tell you the cause of the explosion in the end?"
"And, in such a short time, you can learn from these data It’s really hard to believe that there are so many things inside.”
Director Ding said to Wang Donglai disappointedly.
Before Wang Dong came to speak, Han Ming spoke.
"No, Director Ding, Academician Wang has said enough here. Next, we only need to look for the remaining parts in a targeted manner, and we may be able to analyze the reasons."
"It has long been proposed to analyze the causes of explosions through changes in data. I’ve been here before, but the requirements are too high. “It requires not only high mathematical achievement, but also sufficient understanding of aerospace technology. I thought this was impossible before.”
"Now, I suddenly have strong expectations."
"Academician Wang, if the cause of the explosion can be found out according to your analysis this time, I think the mathematical formula for analyzing the data is probably not much worse than the successful development of a rocket engine."
Han Ming said It's very serious and comes from the heart.
He really thinks so.
The research and development of each rocket engine requires a lot of time to test, and it can easily explode, which costs at least several million.
This is only the economic cost. If you add the time cost, it will be even greater.
Aerospace technology is a field in which the strong are stronger, and it is unacceptable to lag behind at all.
So time is still very important to us.
If the mathematical formula developed by Wang Donglai is really effective, it will play an extremely important role in the development of our country's aerospace technology.
At the very least, it can help rocket engine research and development reduce the time to find the cause of the explosion.
The talents in our country who can engage in aerospace technology are undoubtedly top talents, and the labor cost is extremely high.
The benefits of being able to save the time of these top talents are unimaginable.
It is precisely because of this that Han Ming said these words.
Wang Donglai acted very calmly and said aloud: "Han Gong, this is not urgent, it is just a set of mathematical models and a few mathematical formulas."
"We will really find it later. After finding out the cause of the explosion, we can say that there is nothing wrong with my model and formula.”
“It’s still too early to say this now”
Regarding Wang Dongli's calmness, Han Gong nodded appreciatively.
No more talking, he suppressed the several causes of the explosion that he had originally guessed in his heart, and began to conduct special tests based on Wang Donglai's guesses.
There are many reasons that can affect a rocket engine and cause it to shut down.
For example, it is a rocket liquid oxygen tank, or a circuit, or a propellant injector.
With the direction check, the speed will naturally be much faster.
In this experiment, the fuel inside was not very large, so the power of the explosion was not very great.
Many of the devices are well preserved, so they are very helpful for inspection.
February, although it is not the depth of winter, the temperature is still very cold.
What's more, the natural conditions in a place where rocket engines can be tested are not very good, which makes it even more cold.
Under such circumstances, detailed inspection of many devices is definitely a hard job.
After just a moment, everyone's fingers were frozen and stiff.
However, no one gave up, but still carefully checked the status of each device, without missing a trace.
Wang Donglai did not suggest waiting until it gets warmer tomorrow to check again, or bringing these devices indoors for inspection.
On the one hand, it is a race against time. The sooner we can find out the cause of the explosion, the more time we will have to make changes.
On the other hand, no one can guarantee whether new damage will occur if you bring these devices back indoors, which will affect the judgment and analysis of the cause of the explosion, leading to the opposite effect.
Half an hour!
One hour!
While everyone was busy checking the devices, Wang Donglai was not idle, but continued to hold the documents in his hands and analyze them again.
When he was in school, Wang Donglai often heard a sentence from students with poor math scores.
What’s the use of learning mathematics well? Do you need to use linear equations or functions to buy groceries after graduation?
This sentence seems reasonable, but in fact it is biased.
The usefulness of mathematics is reflected in all aspects, and to what extent it is used and what effect it has, it depends on how high one's mathematical attainments are.
In the hands of ordinary people, it may not be of any use after graduation.
If you really want to do simple calculations, just take out a calculator. You don’t need to use your brain at all, and even using your brain is not as fast as a calculator.
But in the hands of a genius like Wang Donglai, mathematics is different.
Just like at this moment, after analyzing various data of the rocket engine and establishing a mathematical model, a rough conclusion was drawn.
Then, through several refined linear formulas, we further found the problem.
This ability is worthless in the eyes of people who don’t know the goods, but people who know the goods can see that it is of great value, just like Han Ming.
Soon.
A slightly excited voice came: "Han Gong, come and take a look!"
Hearing this slightly excited voice, Han Ming walked over without hesitation.
Director Ding and others also stopped what they were doing, turned their heads and looked over.
"Gong Han, look at this liquid oxygen tank!"
Han Ming walked over, turned on the light, and began to inspect it.
Looking at the light, Han Ming quickly discovered something was wrong.
The screws on the liquid oxygen tank are wrong!
Some are broken, and some are twisted.
Wrinkling his eyebrows, Han Ming was thinking rapidly.
Director Ding waited for a while and found that Han Ming was silent, so he walked over and noticed the screw problem of the liquid oxygen tank.
Just thinking for a moment, he said with certainty: "This explosion should have nothing to do with the liquid oxygen tank!"
"It's just that the screws are broken and twisted. It can't cause the engine to explode at all!"
Han Ming shook his head and said, "Not necessarily!"
"Han Gong, I didn't Not that I have any objections to Academician Wang, but I feel that we haven’t even done telemetry, external measurements, and optical measurements. These data They didn’t even show it to Academician Wang. It would be incredible if we could analyze the cause of the explosion with just that little data!”
“In my opinion, we should still conduct the analysis according to the original process! Okay."
"After all, we can't afford to waste any time."
Hearing what Director Ding said, Han Ming frowned and was about to refute.
Wang Donglai’s voice rang out.
I don’t know when, Wang Donglai also came over, obviously hearing what Director Ding said.
There was no angry or angry expression on his face, he remained calm as before.
Just the next moment, what Wang Donglai said made the two people's expressions change. (End of chapter)