The military-industrial scientific research system of the academic master

"Wait a minute ..."

In the face of such a dramatic situation, it was Lin Chenggang himself:

"Academician Chang, let me slowly ..."

Compared to Shen Fangzhong, who was born in Rockets dynamics and Li Jianqiang, from the air conductor, as a technician who specializes in studying rocket power and solid fuel, he is in a state of "understanding, but not fully understand" the theoretical chemistry. Essence

It is precisely this state that he cannot ignore all intermediate links just as pure laymans, and he can't quickly and fully understand the calculation process displayed on the computer.

After all, it also involves quite complicated mathematics and physics knowledge, which is indeed slightly complicated for a traditional engineer.

As a result, before he completely digested the part of the problem, he heard that Chang Haonan said that three new tricks were reorganized on the basis of his system.

Even if the heart is broken, even if it is very powerful.

Fortunately, Chang Haonan also knew that his progress might be a bit fast, so after hearing Lin Chenggang's stop, he waited patiently for a while.

However, there are things, not just not.

If I didn't understand it at the beginning, it would be difficult to think about it in a short time.

So a few minutes later, Lin Chenggang's tight frown not only did not stretch, but twisted deeper.

Seeing this is not a way to drag like this. Chang Haonan had to re -open, interrupting the other party's thinking:

"If you don't understand what you don't understand, you can also ask me directly ..."

Hearing this sentence, Lin Chenggang's face flashed a tangle.

Obviously, it is obviously a system that I have made, but no one else understands it. This is a great blow for a technician.

But it is not the first time, so he almost made himself out of his instant.

"After all, it is Academician, there is no shame ..."

After meditation twice in his heart, he nodded as a calm place:

"When I designed the pushing agent architecture, I considered the thermality and hydrolysis of polyethylene glycol, and not only conducted a separate component test under the laboratory conditions, and also processed the pillar of the pyramid for the full process of combustion simulation, but at that time I didn't find a similar problem ... "

The results of the real bomb test are here, and the calculations of Chang Haonan can also be confronted. Lin Chenggang must have understood that he was wrong.

But the specific mistake made him unable to think about it for a while.

Due to its special constituent, even different batches of products with the same brand number sometimes show certain performance fluctuations, but at most, there is a few percentage gap at the numerical level. It is impossible to fluctuate. The opposite feature is right.

"Because this belongs to a class of individual differences very obviously ..."

Chang Haonan replied:

"Don't say that it is a laboratory simulation. Even if it is the previous test, don't there be no problem in the 12 rounds of the 12 rounds?"

He said to turn back the calculation process back to the previous page, and then explained:

"Under normal circumstances, even if you work in the most slow -burning way, the burning time of the solid propellant will not exceed 5 minutes ... Don't say 5 minutes, even if 50 minutes will not allow the water elimination response to spread to the entire entire The pillar of the medicine is at most it has some adverse effects, and it is basically negligible according to the proportion. "

"That……"

This time, Lin Chenggang's eyes were a little stunned.

"Therefore, the key to polyvinol degradation at high temperature is actually not water."

Chang Haonan finally revealed the answer:

“水消除后的主要产物是烯烃，在聚合物残余结构中形成碳碳双键，并沿着聚合物链迁移到下一个相邻的羟基，继而发生酮-烯醇的异构化反应，而For some polyvinyl alcohol with a relatively low degree of alcohol, a large amount of acetate groups will be retained in the molecular chain structure, causing a large amount of gaseous acetic acid to produce the decomposition process, and inducing the violent telescopic and vibration of hydroxyl and cymbal groups ... "

"..."

After turning mathematical languages ​​into chemical language, Lin Chenggang finally thought.

"I see……"

However, no matter mathematics or chemistry, there is no difference for the other two people listening to it.

They finally waited until the end of this part, and Shen Fangzhong quickly cut into the topic to prevent Lin Chenggang from continuing again:

"Academician, I don't know chemistry ... but from the perspective of combustion dynamics, since the workflow can be completely controlled, can it be used to abandon the traditional core combustion mode and directly use end -surface burning?"

"In this way, you can make the section of medicine into a porous honeycomb -shaped, or it is simply solid ... or even if the hollowing the medicine is unchanged, the end surface combustion can also increase the overall intensity of the pillar of the medicine pillar, reduce the hidden dangers of the failure of failure, "" "

In order to ensure the uniformity of burning, the traditional solid propellars are made into cylindrical types. After igniting from the top of the pillar hole, it is burned from the inside to the outer layer.

The problem brought by this is that the entire pillar of the medicine will become thinner and thinner, and the intensity will become worse and worse.

In the past, the solid propeller was a way to buy and sell a hammer. After the outbreak, it soon ended. The impact of this combustion method may not be great.

However, the combustion of the electronic control agent runs through almost the entire flight. Even if the initial intensity of the pillar is improved, it is easy to cause problems due to huge horizontal overload at the middle and end.

End face combustion burns the propellant column from bottom to top, and the ability to withstand overload becomes stronger and stronger, so there will be no concerns in this regard.

Chang Haonan was just interested in the propellant system developed by Lin Chenggang, so he came to see the situation before the gliding super super entered the key stage of research and development. He did not consider things closer to the application level in advance, so he did not answer immediately after hearing the words, but just lowered his head and thought for a moment.

"End face combustion is no problem. At most, an expansion chamber is specially set up between the charge and the nozzle. The key lies in the ignition method..."

No mistake, one sentence, one post, one content, one 6, one 9, one book, one bar, take a look!

He said, looking at Lin Chenggang who was taking out a notebook and writing furiously beside him.

As the designer of the CTK series of propellants, the other party must have considered this aspect.

The latter just finished taking notes at this time, raised his head and answered:

"Unlike conventional propellants, the ignition of electronically controlled propellants depends on the contact between the electrode and the grain. Because it needs to be ignited multiple times, the electrode must overcome the morphological changes caused by the combustion of the grain and always maintain contact with the combustion surface..."

"In this case, the core electrode is obviously the most intuitive way. The outer electrode can be directly integrated with the rocket shell, and the inner electrode can directly replace the original igniter. If it is made to burn on the end face, there will be problems with the electrode arrangement. At least one end needs to move with the grain to achieve continuous work."

Perhaps because he felt that simply speaking was a bit abstract, he fumbled around for a few times, and then pulled a whiteboard from the other end of the machine room.

"I have also considered the design of ring-end electrodes, with both electrodes fixed... This way, the heat generated by the electric energy thermal effect can be mainly concentrated in the combustion end surface area, effectively reducing the melting phenomenon of the grain column, and the structure is relatively simple. The problem is that the contact performance between the grain column and the ring electrode is unreliable. If an interference fit is used, the movement of the grain column will be problematic..."

"..."

For a while, several people fell silent around the whiteboard.

"Maybe... use coplanar electrodes?"

In this regard, Chang Haonan has not done any special research, so he is not very sure:

"Two identical electrodes are arranged on the same surface, and the grain column is kept moving downward as it burns through air pressure or hydraulic pressure to maintain contact. The current density of the grain column is concentrated on the combustion surface of the grain column, and the propellant on the surfaces of the two electrodes is burned. At the same time, it can overcome the defect of the grain column being overheated and melted as a whole under the action of the electric current thermal effect..."

He took the marker and made a slight modification on Lin Chenggang's drawing.

Design is sometimes like this.

The essence may not be complicated, but if the inspiration is not in place, it may really be stuck for a long time.

Therefore, Lin Chenggang understood it almost immediately:

"And it is easier to lay out the mesh electrodes, ensuring that there will not be too much additional resistance during the gas discharge process..."

Seeing that his idea was feasible, Chang Haonan threw the marker aside and continued:

"The only problem is that because the powder column needs to be constantly moved through an external balancing force to achieve continuous contact between the electrode and the powder column, the external balancing force of the moving powder column should be able to change with the load, and the speed of the moving powder column should be adapted to match the burning rate of the powder column, which may be difficult for solid propellants."

"That's not a problem. I have enough burning rate-voltage matching data, so it's easy to develop a new control logic..."