Seeing the arrival of one of his proud protégés, Mr. An Zhusheng's face changed a lot.

"Xiao Zhou, you're here too, that's just right. I happen to have a very important matter here, and you can help you in a moment. Old Man An summed up in his heart, although the form of this formula is relatively simple, but after all, the more data used to test it for a while, the greater the test that this formula can withstand. It is estimated that the few people around me now are not enough. But if Xiao Zhou joins in, just because he is now the deputy chief engineer of the institute, there is no problem in catching a few people and sending some tasks, so of course he will warmly welcome Vice President Zhou to join.

"All right, old man. What do you want me to do, in a word. I'm here with you today, ready to complete the task you've given me. Deputy Chief Engineer Zhou naturally agreed. People who can get into this position can't see without a little vision in their heads. If he knew the energy of the old man Lu Daoan in the system, and deliberately made himself uncomfortable, then such a strange thing should have been eliminated from the ranks of revolutionary cadres a long time ago.

At this time, the data clerk and the engineer who had just gone to look for the data had already placed the pile of data bags on the table. Old man An Zhusheng saw it and walked straight to the table. Vice President Zhou hurriedly followed, and on the side, he also asked by the way: "Mr. An, what did you suddenly remember to call the information of this project?" Didn't this project deviate greatly from the test data and design, and finally ended in failure? Do you want to write a failed case if you find out now? ”

An Zhusheng took a deep breath. The ultimate failure of this project was a major blow to him. The high-temperature blades that broke in the previous engine test accident had already made him lose points in the ministry after insisting on the test on his own, and the failure of this project made him completely want to go. After the project was determined to be a failure, he resigned from all his concurrent positions such as commander-in-chief and chief designer, and left the research career of the 606 Institute that he had struggled for decades. I just spend most of my time in the library. If it weren't for Shen Yiyi's formula today, which made him have an idea, remembering that the failed test at that time also left a large amount of test data, which was just used to check the accuracy of this new formula, he really didn't want to return to the memory of this sad project from the bottom of his heart.

After doing enough construction psychologically, An Zhusheng chatted with Vice President Zhou calmly.

"Xiao Zhou. I have a formula here. After a while, you bring a few people and input some calculations in the early stage of this project to go in and take a look. In this way, take a few more points and calculate them all. I want to see how your calculations will differ from the results of your calculations. ”

As he spoke, An Zhusheng took out the well-folded piece of paper with the formula deduced by Shen Yiyi from his close-fitting pocket. Vice President Zhou took the paper and opened it. "Huh", and then looked at An Zhusheng: "Old man, it seems that I have never seen this formula." Which book did you find it from? ”

An Zhusheng didn't answer, but just ordered: "Quickly find someone to calculate it, as for the origin of this formula, I will tell you later." ”

Vice President Zhou agreed, and called the person who had just notified him: "Li Gong, you are like this." Find a dozen or so people from the people who are still today, and substitute all the input conditions in the stack of data into this formula in a while. I estimate the formula. If possible, you write a simple program and use a computer to execute it. It's a little faster and less prone to errors. ”

After Li Gong agreed, he left the office and went to the computer lab next door. Computers in this era are expensive things. There are only a few PCs in each unit. You have to build a special air-conditioned room to wait, in addition to turning on the air conditioner, you have to change your shoes when you enter and exit the house. So it's not a simple thing to get on the machine.

Li Gong is a person who is relatively familiar with computer commands in the institute, and Shen Yiyi's formula is very simple in form, making up a simple program. It didn't take much time, and the program was compiled in about ten minutes. It has to be said that since Shen Yiyi's formula is an empirical formula, there is no need for any common methods of numerical calculation such as boundary elements and finite elements. The formula she gave was actually just a polynomial, of course, because of the high temperature part, there were also iterative requirements.

For the computer, the amount of calculation of this formula is too small to be smaller, so what Li Gong has to do now is to input the complicated input conditions one by one into a format that the computer program can recognize. Fortunately, Vice President Zhou sent him more than a dozen people, and he quickly divided the labor to these dozen or so people, each of whom was responsible for entering a bunch of input data, and then cross-checking. After the most computation, it is submitted to the program to perform the calculation.

There is a lot of power. According to this division of labor, after an hour, the original design input was used as input, and the calculation results were output by executing the program of Shen Yiyi's formula calculation. Li Gong quickly returned to the office next door with the calculation results. There, Mr. An Zhusheng was accompanied by Deputy Chief Engineer Zhou, waiting for the result.

In this hour, Old Man An Zhusheng's heart was definitely not as calm as he seemed to be. He was actually very nervous. It can be said that he has high hopes for Shen Yiyi's formula. In his heart, he very much hopes that by introducing Shen Yiyi's formula, he can bring a ray of light to his research project that has originally entered a dead end. If the calculation result of this formula is similar to the original calculation result, in view of the difference in the nature of these two calculation methods, it means that there is no problem with the original calculation, and there may be a problem in the test design. However, if the calculation result of this formula is very different from your own calculation result, then it depends on the comparison of this result with the test result. If this result is closer to the test result, it means that there is a problem with your original calculation, and this formula can be used to correct your original wrong design. In this way, the importance of this formula cannot be overemphasized.

Therefore, although he and Vice President Zhou said some things this or that from time to time during this hour, and seemed to chat easily, these things he was thinking about in his heart made him ask as soon as he saw Li Gong finally return to the office: "Finished?" How's it going? ”

Vice President Zhou saw that Mr. An was asking in front of him, and knew in his heart that Mr. An was probably in a hurry, so he also asked: "Yes, Li Gong, how is it, how much is the calculation result different from ours?" ”

Li Gong looked at the pile of data in his hand, and compared it with the calculation book in the data: he said uncertainly: "The difference between the calculated value of the machine calculation and the calculated value in the calculation book is about 40%. ”

"Really?" Vice President Zhou looked at Old Man An. He was a little disappointed. I thought that Mr. An brought what kind of good thing, why is this formula too different from our original calculation results. You must know that our original calculation results are calculated by very classical methods, and these are calculation formulas that have been proven by history. Now this new formula will be so much worse than the classic formula, which is too low accuracy.

Who knows, but Old Man An was so excited that his voice began to tremble: "Look for it again, and see how much difference is between the test results at that time and the calculation results of this formula?" I remember that the test results were so much different from our calculations at the time. ”

Vice President Zhou was startled when he heard Mr. An Zhusheng's words. That's when he remembered, yes, this was a project that had failed in its trials. If the original calculations had been correct, the project would not have failed. However, if there was a problem with the result of the calculation at that time, and as I just thought, the calculation result that went wrong through the classical formula at that time was calculated correctly with the new formula that Mr. An brought out, which shows how important the value of this formula is.

Li Gong listened to Mr. An's instructions, and with an "oh" sound, he went to the data pile to look through the information again. After a while, he found several large original records that recorded the test data at that time, and compared them with the paper in his hand that recorded the results. This time it was not long, about less than five minutes, and I saw Li Gong excitedly raise his head and report to Mr. An Zhusheng and Vice President Zhou: "The calculation results are basically completely consistent with the test results, only two or three discrete points, but the deviation is not more than five percent." ”

When Vice President Zhou heard the good news, his eyes lit up. The consistency of this data with the test results indicates that this formula is probably one of the most valuable calculation formulas in the history of technology that is most suitable for engine flow calculations. If this is for Old Man An to publish a paper and introduce this formula, he can also add his own name, then he will not be able to leave a legacy in the history of technology? So he excitedly shouted to Mr. An Zhusheng: "Old man, if you want to write a drawing for your thesis, I will help you type." What he means is that he doesn't add his name for nothing, and he will also help sort out the information and so on.

Old man An Zhusheng didn't answer this time, but there were tears in his eyes, and he was so excited that he couldn't speak. He complained a little in his heart about Shen Yiyi, why didn't he let him know this formula earlier. In this way, I would not have made a mistake in my calculations at that time, failed the test, and was forced to let this important project end in failure. However, he was very grateful to Shen Yiyi for being able to have such a perception and find such a formula, so that he had the opportunity to find the reason for the failure soon after the failure of the test. He was even more excited about how much this formula would promote China's engine industry if it was applied to China's equipment production design in the future. (To be continued......)

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