bonanza

Chapter 852 Preliminary Confirmation
"But when will the country release spaceflight?" Vice President Wang said.

Yang Dongsheng smiled, "Don't worry about this. The research and development of aerospace aircraft and scramjet requires hypersonic wind tunnels, supercomputers, and simulation software. It is best to cooperate with relevant departments. Tell me about the progress of gas turbines!"

"Gas turbines don't have to worry about speed. In theory, we can even design a gas turbine with a thermal efficiency of over 60% after a simple cycle, which is higher than a large diesel engine!" Vice President Wang said.

"But what?" Yang Dongsheng asked.

Vice President Wang took a deep breath and said, "But gas turbines and civil aviation airliners have environmental protection requirements! When the combustion temperature is below 1200 degrees, nitrogen and oxygen in the air hardly react. When the temperature is above 1200 degrees and below 1500 degrees, Only a small amount of nitrogen oxides will be generated. But when the temperature rises above 1500 degrees, nitrogen and oxygen will react to produce a large amount of nitrogen oxides, and every time the temperature increases by 100 degrees, the content of nitrogen oxides will increase by 6 to 7 times."

The natural gas entering the gas turbine can be desulfurized in advance, but the cost of removing the nitrogen in the air, or even switching to pure oxygen combustion, is too high.

"What's the solution?" Yang Dongsheng asked.

Vice President Wang said, "The mainstream technology used by major gas turbine manufacturers is lean fuel premixed combustion. The fuel and oxidant are mixed evenly before combustion through a strong swirl premixer. The supply of fuel can reduce the residence time at high temperature, but this technology is also prone to unstable phenomena such as thermoacoustic oscillation and flashback. And we have calculated that even under ideal premixing conditions, once the gas temperature reaches 1700 degrees , nitrogen oxide emissions will also exceed 20 micromoles per mole."

"Yeah!" Yang Dongsheng nodded.

He found that he seemed to have overestimated the role of this material before.

"This method can greatly reduce the volume, weight, and cost of the gas turbine, and can also greatly improve the reliability of the gas turbine, reduce technical difficulty, and there is no limit to the scale." Vice President Wang said a lot in one breath benefit.

Vice President Wang said with a wry smile, "Because the turbine inlet temperature of the F-class gas turbine is only 1400 degrees, the turbine inlet temperature of the H-class gas turbine is said to be 1600 degrees. But after the work is done, the temperature of the exhaust gas quickly drops to five or six. Baidu! If it is specially heated, the cost is too high, and the gain outweighs the loss!"

"What plan?" Yang Dongsheng asked.

Yang Dongsheng's eyes lit up immediately, "As long as the exhaust gas temperature of the gas turbine is high enough, these nitrogen oxides can be decomposed into harmless nitrogen and oxygen by themselves, and as long as the temperature is controlled below 1500 degrees, nitrogen and oxygen will not be converted into large quantities again. Nitrogen oxides. In this way, there is no need for lean fuel premixed combustion, and there is no need to build a denitrification device. This method is good!"

"Where are they all?" Yang Dongsheng put down the list and asked.

But the more Yang Dongsheng listened, the more he felt something was wrong, "Since this method is so good, why are other manufacturers useless?"

"Taiwan has sent a new batch of lists!" Liu Weiguo said.

Is it just an empty rejoicing?
At this time, Vice President Wang hesitated and said, "Yesterday, someone from the Turbine Division proposed a plan."

"Isn't your grandma out yet? What did she say?" Yang Miao asked.

Vice President Wang thought for a while and said, "There are many types of nitrogen oxides emitted by gas turbines, but the most important ones are nitrogen monoxide and nitrogen dioxide. When the temperature is higher than 150 degrees Celsius, nitrogen dioxide begins to decompose, and when the temperature reaches 650 degrees Celsius When it is heated, it will be completely decomposed into nitrogen monoxide and oxygen, and when the nitrogen monoxide is heated to 700 degrees, it will start to decompose into nitrogen and oxygen, and it will decompose violently at 1200 degrees."

At this time, a car stopped nearby, and a person came down and said, "Why is there a fight!"

He had just returned from Japan, and his expression looked a little tired.

Yang Dongsheng laughed at himself, but he forgot about it.

"You beast, the little tiger is less than ten years old!" Yang Miao strangled Yang Lin's neck.

"According to our investigation, after the Great Hanshin Earthquake, some abnormal situations did occur in Kyoto, Osaka, and Nara! We have initially identified several places."

"[-] pieces!" Yang Dongsheng took it over and glanced at it. At this time, what he wanted to know was another thing, "How about this trip to Japan?"

……

"Let go, let go! I didn't agree! Besides, isn't Li Qi not ten years old..."

It turned out that I still wanted Yang Dongsheng to make a decision!
"I support it!" After understanding what Vice President Wang meant, Yang Dongsheng expressed his opinion immediately.

"Basically they are ancient tombs and temples!" Liu Weiguo said.

Yang Lin shook his head and said, "A year ago, when I went to see my grandma in prison, she gave me an idea to find a way to marry your tiger!"

Before getting into the car, Yang Dongsheng patted Vice President Wang on the shoulder, "I almost forgot that today is the weekend, so you should go back early to rest!"

But isn't their biggest advantage now that they have extremely high temperature resistant materials?
As long as the turbine inlet temperature is pulled high enough, the exhaust gas temperature can be high enough.

After going to work on Monday, after listening to Director Li's report and dealing with the backlog of work, Liu Weiguo was the first to come in.

"Actually, a similar method can be used to reduce the generation of nitrogen oxides on the aero-engine side! This solution can also be used for hydrogen fuel in the future. Due to the extremely high combustion temperature of hydrogen, a large amount of nitrogen oxides will also be produced, which can be described as promising. ! It's just..." Vice President Wang paused for a moment and said again, "It's a bit risky to do this, and you have to make some compromises on thermal efficiency. The company's review committee is a little hesitant."

At home, Yang Miao asked Yang Lin, "What did you just say, let the little tiger punch you?"

"I told her what my grandma said!" Yang Lin said.

"Ancient tombs and temples? One is a place where the dead are buried, and the other is a clean place outside the world. I am afraid that the US military will not search temples and ancient tombs. They are indeed good places to hide things!" Yang Dongsheng said.

Liu Weiguo shook his head and said, "Temples in Japan are not a clean place outside the world. Many of those temples belong to the Japanese imperial family. During World War II, Japanese monks drew maps for the Japanese army, inquired about news, and did many things that were inconvenient for the Japanese army. , and even military monks. When we went this time, we found that some Japanese temples were openly placed at the entrances, and the stone lions looted from China, and even many Buddha statues in the main hall were also snatched from Chinese temples!"

"A group of robbers in monk's robes!" Yang Dongsheng said angrily.

Liu Weiguo continued, "Before World War II, those ancient tombs were the proper property of the Japanese imperial family, and ordinary people couldn't get close to them at all! I think there is a very high possibility that things are hidden there! It's just that we don't have direct evidence yet. Conduct an in-depth investigation!"

(End of this chapter)