Chapter 305 Hydrazine is good, but I want dimethylhydrazine even more
In a certain chemical research institute, Mr. Cai and a middle-aged man with slightly gray hair looked at a full-body protective worker through the glass outside. The researchers carefully dropped a drop of liquid into the reaction dish in accordance with the relevant test procedures.
A low beep sounded, and a cloud of smoke appeared in the reaction vessel, with a flash of fire.
The two people looked happy, and the middle-aged man smiled and said: "Mr. Cai, it seems that your source of information is very reliable. At least there is no problem that hydrazine and dinitrogen tetroxide ignite when they meet."
When he got the pieces of paper from Mr. Cai and the others, he knew what it was, hydrazine, or a hydrazine-like substance.
Although the one inferred above is called 1,1-dimethylhydrazine, which is also called undimethylhydrazine, it is still unclear, and even the synthesis method is not known yet, but hydrazine itself can still be produced.
They quickly organized manpower and started experiments.
Hydrazine was synthesized quickly, and the specific engine-related parameters are still being tested. People who are bored with waiting simply try the ignition performance first, and the results look good.
Mr. Cai thinks more than him. Combined with this result and judging from Director Gao’s past deeds, this is almost a sure proof that everything he said is true. If it doesn’t come true, it will come true. What's wrong with the process?
This conclusion almost made him hum.
Not long after, a researcher hurried over, holding a few pieces of paper.
“Researcher Yue, Mr. Cai, some of the results have come out.”
Researcher Yue took the results, read them over, and handed them to Mr. Cai: “It doesn’t look like there’s anything wrong with it. The situation is getting more and more optimistic.”
Mr. Cai took it and took a look. It mainly contains some physical properties, which are relatively fast to measure.
"Boiling point 113.5℃, melting point 1.4℃, density 1.01."
Huh~~~~~~, this makes Mr. Cai gnash his teeth a little bit. No wonder Director Gao doesn’t recommend using hydrazine, but prefers the derivative he said, metadimethylhydrazine.
Researcher Yue saw his expression and asked: "What's wrong? It seems like you are not satisfied?"
Mr. Cai nodded: "Well, the melting point is 1.4℃, a bit It is too high, so the fuel will easily solidify in the north, and it will be a bit troublesome to keep it in a liquid state. No wonder people say that the structure of solid hair and liquid hair are completely different. , if a fuel solidifies easily, it will cause a lot of trouble. It cannot be said that the liquid state is burned as water and the solid state is burned as coal. The engine does not have that capability.
Researcher Yue smiled and said: "As long as it is confirmed that most of your sources are accurate, then I want to try to synthesize this unidimethylhydrazine. We can put it on the schedule. You don't have to worry about this. , now let’s see if the part that can be confirmed is correct.”
I don’t know how long it took, but Mr. Cai and Researcher Yue’s colleagues came back from the laboratory, their faces flushed. I don’t know whether they were burned by the fire or because of excitement.
"Mr. Cai, Mr. Cai, you have something to say. The theoretical specific impulse of this hydrazine-nitrous tetroxide combination is over 340 seconds. Just now we measured a specific impulse of 280 seconds, which is lower than liquid oxygen and kerosene, but not much lower. , it works perfectly.”
It seems that it’s because of excitement!
The ratio between hydrazine fuel and liquid oxygen kerosene actually has no advantage in specific impulse. The theoretical specific impulse of liquid oxygen kerosene is more than 360 seconds.
The calorific value of hydrazine is about 19000kj/kg, which is less than half of the typical calorific value of kerosene of 45000kj/kg. Taking into account the oxidant, density, reaction process and products, etc., its specific impulse is only higher than that of kerosene. A little less can already illustrate the benefits of hydrazine fuel.
This slight disadvantage of 20 seconds of theoretical specific impact is exchanged for a huge improvement in the storage performance of the ammunition, which is well worth it.
Not to mention the bomb, even if it is not stored on the bomb, the supporting base will be easier to design and build because it does not need to maintain enough liquid oxygen.
However, when it comes to specific impulse, the big brother of practical liquid engines nowadays is the hydrogen-oxygen engine, which can last for more than 460 seconds. Just from the nickname of this thing "Ice Arrow", we can know that it is obviously intended to be used in missiles. Much more.
If we have to talk about specific impulse, there is another combination that can be described as crazy-liquid fluorine/liquid hydrogen, 490 seconds, but this thing is so explosive that poisonous hair is not enough to describe it. No one dares to use it. The reason is very simple. Guess what the combustion products of this set of ghosts are?
So when Mr. Cai heard that the specific impulse of the hydrazine-nitrous tetroxide combination reached 340 seconds, he was completely relieved, it can be done!
Even if unimmonium hydrazine cannot be produced, it is much easier to build a system on the bomb to maintain the hydrazine fuel temperature at normal temperature than to maintain liquid oxygen at -183°C.
He turned to Researcher Yue and said: "Researcher Yue, I leave this matter to you. There are two things. One is to synthesize a certain amount of hydrazine for us to study and test, and the second is to It is of great significance to us to try to synthesize unimformed dimethylhydrazine.”
He remembered clearly that Gao Zhendong said that the specific impulse of uniminated dimethylhydrazine is basically the same as that of hydrazine, but its thermal stability is better. The melting point is lower, which means it is not easy to solidify.
The currently synthesized hydrazine will not be wasted. Hydrazine can be used as the basis for the design of hydrazine-based liquid hair. After all, the specific impulses of hydrazine and unimformed dimethylhydrazine are basically the same, and many designs are common. Moreover, hydrazine can be used as a backup option in case of failure or delay in the synthesis of undimethylhydrazine, so it cannot be wasted.
For him, he has the time to do this now, because whether it is an imitation liquid oxygen alcohol or an improved liquid oxygen kerosene engine, since the two are very similar, they have been basically completed, and there is a shortage of projects.
Researcher Yue said with a smile: "Don't worry about this. If you want to produce unimformed dimethylhydrazine, the synthesis of hydrazine is indispensable. Although it is not necessary to use hydrazine as the intermediate product or raw material of uniminated dimethylhydrazine, we We also need to synthesize a considerable amount of hydrazine for research.”
The two are very interested, and now there is basically a clear path leading to a storable liquid rocket engine. As a supporting research institute of Liquid Hair, Researcher Yue also saw the dawn of success.
The structures of both hydrazine and undimethylhydrazine are relatively simple, and the only thing that replaces the hydrogen atom on the nitrogen-hydrogen bond is methyl group. They are relatively simple. He is also relatively confident in the synthesis of undimethylhydrazine. .
Originally, the domestic synthesis of undimethylhydrazine was successful about ten years later. This improvement is not a small improvement.
Mr. Cai and Researcher Yue quickly got into work with their respective tasks.
——
On Wednesday afternoon, Gao Zhendong attended the meeting on DJS-60D jointly held by the 17th and 12th Machinery Departments and the National Defense Work Committee on time.
But to his surprise, the person who introduced him at the beginning was not him, but Chief Engineer Chi from the computing center.
Needless to say, the reason was that this meeting was crowded with people. Although the requirements for personnel and related levels were clearly stated, in the eyes of these three companies, it was still not suitable for Gao Zhendong to come forward directly.
So Gao Zhendong quietly acted as a minion at the back, but when the leader of the Postal and Communications Commission who attended the meeting in person walked past him, he couldn't help but smile.
As a rising star with a high reputation, it is not common to see Director Gao squatting in the back row of a meeting. Take advantage of the rare occasion and take a closer look, haha.
Chief Engineer Chi introduced the general situation of DJS-60D, its computing speed, peripheral driver capabilities, current supporting software, etc., and then got to the most important part.
“Currently due to raw material reasons, the production capacity of this product is not high. It is only maintained by imported components, and the domestic process is still under research. Although the progress is good, it will still take a certain amount of time overall.”< br>
Someone said half-jokingly: "Then what are we asked to do today, draw cakes?"
The meeting has requirements for level, so the people who come are at least at the same level as Mr. Chi, and there are even people who are half a level higher than him, so Mr. Chi is not easy to accept this at the moment. talk.
The leader of the 12th Machinery Department smiled and took over the words: "Well, you are right. Let me show you the cake painting first. You can also think about it. This cake has this look. It looks like you are about to get it, how do you eat it? If you can’t eat the cake for the time being, why don’t you learn how to eat it first?”
Chief Engineer Chi then continued: “ First, we will introduce the status of this achievement. After the meeting, relevant materials will be distributed. After receiving the materials, each unit can also use this material to see how to use this thing based on their respective professional fields. "
Many comrades nodded one after another, thinking that this is also true. We have always been waiting for equipment.
“Well, this is okay. At least it can save a lot of time in application development.”
"Not to mention, in just this short time, I have already come up with 800 application directions. The good thing about this thing is that it is compact. If the head is small, there are many ways to use it."
< br>"It's a pity that we can't get it now, but it's okay, it can give us some time to think, and we won't be caught off guard when the equipment comes down."
"How many do you think they have now? Can it be used? "
"Looking at this posture, it is probably in the single digits."
"Look, the National Defense Work Committee is not in a hurry at all. Normally, they must be in trouble now. The most needed.”
"Hey, it doesn't matter what you say, they are definitely not in a hurry, and you don't want to overtake them. You should think about your own affairs first."
"."
In addition Two ministries and commissions that are firmly in the Diaoyutai, one is the Postal and Communications Commission, which has a small business, and the other is more special, the Ministry of Foreign Commerce.
Their demands and ideas are different from all ministries, so there is no need to discuss them here. In fact, there is one thing that has not been made public today, that is, after this conference, there will be a small meeting, and that is what they have to consider.
After discussing for a while, someone raised a question that everyone was very concerned about: "Then the output of this achievement is so limited now, how to determine its distribution?"
Hearing this, everyone got excited. Since it can't be opened for a while, how can we get it as soon as possible? Although they belong to different ministries and commissions, some applications are common and there is a certain degree of competition.
(End of this chapter)