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The road to scientific research has always been extremely long and bumpy.For scientific research, it is already very difficult to find problems, but to solve them, the difficulty has gone up to another level.

The next day, when Yun Yongan brought Lin Jing to the conference room, many researchers were already arguing in full swing.

In order to solve the problem of damage to the turbine and bearings of the rocket engine combustion chamber during re-operation, everyone used their imagination, expressed their opinions, and put forward many different ideas.

There is a proposal to replace the material.

There are proposals to revise the rhythm.

Some people also suggested that we should simply overthrow and start over and use the turbine he designed
Everyone has their own ideas and theoretical support for their own suggestions. The engine research team and other leaders of the rocket research team have proposed hundreds of solutions.

In the end, it was Li Xinlong who came out and suppressed the riots. Everyone calmed down, discussed and demonstrated one by one, and temporarily rejected more than 70 proposals that were not complete in theory and took too long to study, leaving only 27 proposals.

Then, Li Xinlong released the resources that can be called at present, the manpower and material resources that can be used, and choose the best among the 27 plans.

Finally, three sets of plans were finalized.

With a plan in hand, everyone was gearing up and preparing to start burning themselves for the aerospace industry, when a bad news suddenly came.

Because the Zhenglong rocket has not yet been reset to zero, in order not to affect the progress of other research, the factory that cooperates with the Zhenglong rocket base has started new production work.

This means that they cannot customize parts in the factory, which means that all the original plans have been overturned.

Now, there is not much time left for zeroing. It is too late to wait for the factory to complete the current order and restart the machine.

"What to do, what to do!" Everyone including Li Xinlong became ants on the hot pot.

The engine expert who was pulled over for a meeting, after going through all the materials of the factory that had already started work, also frowned and fell silent.

Except for a few factories that produce large-scale equipment such as shells and brackets, other factories, especially the special factories required for engines, have adjusted their production lines and cannot provide enough hardware for the Zhenglong rocket.

While the crowd was wailing, Lin Jing suddenly pulled Yun Yongan's hand, tiptoed and whispered something in his ear.

Hearing this, Yun Yongan's eyes lit up, and he walked quickly to Li Xinlong.

"Ms. Li, do you still have the original materials and paint used for the engine bearings and turbine?"

Li Xinlong didn't know why Yun Yongan asked this, but he still answered the question honestly.

"Engine parts, as the most precious parts, are the places that are most prone to wear and tear. There are still many backups. But these backups are useless. It has now been proved that they cannot guarantee the stability of the engine during operation."

"No no no!"

Yun Yongan waved his hand vigorously, "According to calculations, the main cause of damage to the special alloy in the liquid hydrogen engine is the rapid temperature change in a short period of time. If we can ensure that the temperature does not change drastically, the damage should be effectively avoided."

Hearing this statement, Zhou Sun froze for a moment, "Now the reason for the distance change of the Zhenglong engine is that it uses extremely low-temperature liquid nitrogen as the engine fuel. Are you planning to change the fuel? I recommend the 170 I developed. No. [-] light aviation fuel, with the same mass, contains less energy than liquid hydrogen, but has better stability."

"No need," Yun Yong'an grinned confidently, "In order to ensure the combustion efficiency in the combustion chamber of the liquid hydrogen engine, the liquid hydrogen is not used, but the hydrogen after the liquid hydrogen has been heated by the turbine. A greenhouse."

"We had this idea," a strong man whose hair had fallen out stood up, "but to do this, we must create an initial high-temperature area in front, which will not only increase the weight, but also increase the temperature of the initial high-temperature area." , is difficult to maintain.”

Yun Yongan picked up an erasable marker pen and drew a model of a rocket engine on the whiteboard in front of the meeting room.

"I have also considered this point, so I am going to build a never-stop engine. Since the temperature changes too drastically will cause cracks, shouldn't we lock the temperature in advance?"

Yun Yongan pointed to the pipeline where the liquid hydrogen enters and explained to everyone, "At the beginning of the engine start, the liquid nitrogen flowed in and caused the temperature of the engine turbine and bearings to drop to freezing point. Later, with the violent combustion of liquid hydrogen in the combustion chamber, the temperature of the turbine increased rapidly, resulting in The temperature difference damages the turbine and bearings."

"This seems unavoidable, because only by increasing the temperature of the turbine can the liquid nitrogen behind enter the turbine, be directly vaporized and then enter the power compartment for combustion."

This is the most basic principle of the liquid hydrogen engine, and everyone has no way to refute it, so they can only sit quietly and listen to Yun Yongan continue to talk.

"Now is the key point," Yun Yongan raised his voice, "We can increase the temperature of the turbine before the engine starts, so that the entry of liquid nitrogen will not cause an excessive temperature difference. According to the mathematical model, as long as No temperature difference, no cracks!"

Yun Yongan's idea broke the original dilemma in an instant, and gave many scientific researchers a brand new solution.

"Worthy of being a Yong'an talent!"

Zhou Sun really convinced Yun Yongan this time, and gave him a thumbs up.

Yun Yongan didn't take the credit for this alone, and pulled Lin Jing over: "This is all the inspiration provided by Jinger. I just made a rough plan based on her inspiration. How to maintain the temperature depends on you guys. Boss."

Yun Yongan told the truth, but in exchange for the title of modest gentleman, the applause was like a tide.

Three days later, in front of the Engine Research Institute of the Rocket Launch Base, the modified engine with a temperature control system was fixed on a launch pad.

Li Xinlong, Yun Yongan, Lin Jing and others all came, stood by, directed the staff, poured liquid nitrogen, and started the engine.

Ten seconds, 20 seconds, 30 seconds.

1 minute, 10 minutes, half an hour!

Time passed by every minute and every second, and everyone's hearts became more and more tense.

Finally, 45 minutes passed and the experiment was over.

Cease fire to cool down. After a series of neat and precise operations, the staff disassembled the engine and washed off the upper layer with a special solution, revealing the special alloy inside.

The alloy washed by running water is very smooth and neat, and there is no change to the naked eye.

But this was far from enough. Everyone worked together to send it to professional testing equipment, and at the same time turned on another engine to start a new experiment.