Thinking about these things in her heart, Liu Wei came in happily, and Liu Wei said with a happy face: "Boss, I just received the latest fax from Bombardier, and Smith and his party will arrive at Huangping Airport tomorrow afternoon." ”

Hearing this, Li Tianfeng was also happy and in a good mood, Li Tianfeng said: "Mr. Liu, Smith and his entourage have a strong purpose, they just want to order our turbofan 18 engine, prepare for the reception, and I will personally invite Smith and others to dinner tomorrow night." ”

Liu Wei said: "Well, boss, I will arrange all this, and I will personally go to Huangping Airport to pick up people tomorrow afternoon." ”

After Liu Wei's report, Li Tianfeng was about to calm down and draw another design sketch, about the design sketch of the combustion chamber part of the RQ2000 gas turbine engine, as soon as he spread out the blank paper and picked up the pencil, Li Tianfeng's phone rang.

Li Tianfeng saw that it was Guo Tongde's call, he couldn't help but shake his head slightly, smiled slightly, put down the pencil in his hand, and then joked: "Mayor Guo, what instructions do you have?" ”

Guo Tongde laughed and said: "Mr. Li, I can't talk about the instructions, but I heard that Bombardier will conduct a business inspection of your company, I don't know if it's true?" ”

Li Tianfeng said: "Mayor Guo, you are really well-informed, this matter, I was about to tell you, Mr. Smith, vice president of Bombardier, and his party will arrive at Huangping Airport tomorrow afternoon, I have arranged the reception, if nothing else, Smith will definitely order our engine." ”

Hearing this, Guo Tongde seemed to be happier than Li Tianfeng, last time, COMAC's big money forced Songzhou City's GDP to rise, and this time, Bombardier came again.

Guo Tongde said: "Mr. Li." This is a great event, the purpose of my call is to congratulate you, if this time with Bombardier signed a large order, it will be good news for our entire Songzhou. ”

Li Tianfeng smiled heartily, obviously looking forward to this Bombardier business visit. Li Tianfeng said: "Mayor Guo, if you can really sign another order with Bombardier, I will invite you to be the guest of honor at our signing ceremony." ”

Guo Tongde said: "Mr. Li, then I'll wait for your call, as long as you make a call, I will push off all affairs, and I must be this guest." ”

Li Tianfeng smiled happily.

and Guo Tongde chatted a lot on the phone, and after the call, Li Tianfeng seemed to be in a very good mood. looked at the white paper he had spread out, and he seemed interested.

After adjusting his mood a little, taking advantage of the current interest, Li Tianfeng began to enter the state, his mind was empty, he picked up a pencil, and the first thing he drew was the design sketch of the flame cylinder in the combustion chamber.

The combustion chamber part of the RQ2000 engine, several key parts. Such as combustion chamber casing, inner and outer flame cylinders. Nozzles, etc., Li Tianfeng personally drew design sketches and gave important dimensions and design parameters.

As for the design sketch of the combustion chamber casing, Li Tianfeng has already drawn it, and has given it to Sun Xiaoping and Qiu Wenan, who will organize their own design team. On the basis of this design sketch, the specific design is developed.

The design of the combustion chamber casing is relatively complex, and the design of the inner and outer flame cylinders is not simple.

There are many types of high heat load combustion chambers, and there are many generations, and the first generation of high heat load combustion chambers are widely used in various high thrust-to-weight ratio aero engines.

With the increase in thrust-to-weight ratio. The increase of the inlet and outlet temperature of the combustion chamber, especially the substantial increase of the outlet temperature, and the gradual increase of the heat release rate, also greatly improve the performance requirements of the combustion chamber, and further increase the weight limit of the combustion chamber, and also put forward higher requirements for materials and cooling.

The second generation of high heat load combustion chamber countries have begun to research, those international aero engine giants, began to develop and verify the second generation of high heat load combustion chamber, and began to use it in their own core engine or the latest engine, such as the old United States F119 engine.

Li Tianfeng for the RQ2000 engine design of the combustion chamber, is undoubtedly the third generation of high heat load combustion chamber, than the current most advanced combustion is a generation ahead, such a combustion chamber, not only the weight of the combustion chamber is further reduced, the performance of the combustion chamber is significantly improved, and the life is greatly extended, the improvement of performance is mainly manifested in the full combustion of fuel, fuel utilization rate is greatly improved.

Of course, such a combustion chamber design, very technical content, the material, the process also put forward extremely high requirements, the combustion material must use more advanced ceramic matrix composites, this material, Tianfeng Technology Company has been proficient.

As for the manufacturing process, Li Tianfeng has a complete set of combustion chamber parts processing technology in mind, in view of the materials, processes, etc. have been mature, to meet the design requirements of the third generation of high heat load combustion chamber, so Li Tianfeng decided to verify the RQ2000 engine first, the first to use such combustion chamber technology.

In Li Tianfeng's mind, as if the design of this combustion chamber appeared, Li Tianfeng closed his eyes slightly, and after a little contemplation, he took a pencil and did not use a ruler, and began to draw a sketch of the design of the outer flame tube.

Two hours later, the design sketch of the outer flame cylinder had been formed, and Li Tianfeng began to mark some important and critical dimensions, as well as give the technical conditions for the design, etc.

A closer look at the design sketch of the outer flame barrel shows that it is clearly not the same as the existing combustion chamber flame barrel, which is a typical floating wall ring flame barrel.

After marking the dimensions and technical conditions, Li Tianfeng looked at the flame cylinder with satisfaction, and after taking a look at the time, he was ready to design the inner flame cylinder in the current interest.

However, Li Tianfeng had to immediately put down the pencil in his hand, only to see Sun Xiaoping and Qiu Wenan, knocking on the door and entering his office together, Sun Xiaoping's hand was still holding the design sketch of the RQ2000 engine combustion chamber casing drawn by Li Tianfeng a few days ago.

Seeing the appearance of the two of them, Li Tianfeng knew what was going on, and he must have encountered a problem when he unfolded the specific design of the combustion chamber casing.

The design of the combustion chamber part is very advanced, and even requires a lot of new design theories, and it is completely normal to encounter problems in the specific design process, Li Tianfeng was not unhappy at all, on the contrary, showed enough patience.

Sun Xiaoping said with a sad face: "Boss, we are useless, when we unfold the specific design, there are many places that we can't understand, and we can't continue to design." ”

Li Tianfeng smiled and said: "Don't worry, I don't blame you, it's just right, I have finished the design sketch of the outer flame tube, you can also take a look." ”

In fact, the two of them had already seen this design sketch, and when they saw Li Tianfeng say this, the two immediately took it seriously, and the more they looked at it, the deeper their brows wrinkled, and they even glanced at each other, obviously, there were many things that the two couldn't understand and couldn't understand.

Seeing this, Li Tianfeng said: "Come, sit down, it seems that it is necessary for me to talk to you in detail about the third-generation high heat load combustion chamber design technology." ”

Hearing this, the two sat down and listened carefully to Li Tianfeng's explanation.

Li Tianfeng said: "This kind of combustion chamber is the third generation of high heat load combustion chamber design, which involves the design theory of high temperature rise and high heat capacity......

Li Tianfeng explained very carefully, the two also listened very carefully, and even took notes carefully, after speaking, Li Tianfeng said: "Such a combustion chamber design technology, under the same oil and gas level, can provide higher thermal efficiency, that is, the engine output the same power, such a combustion chamber will be more fuel-efficient." ”

Sun Xiaoping said: "Boss, listening to you say this, we basically understand." ”

Li Tianfeng said: "In the design process, if there is anything you don't understand, you can ask me directly. ”

The two nodded, and Qiu Wen'an said: "Boss, no wonder it is the same gas turbine engine, with an output of 2,000 horsepower, and the fuel consumption per 100 kilometers is only 280 liters, which is a big drop in fuel consumption per 100 kilometers of similar gas turbine engines." ”

Li Tianfeng nodded and said: "Go ahead, carry out the specific design according to my design sketch, if you have time, call our design backbone together, I will give you a lesson, and tell you about the design technology of this advanced combustion chamber." ”

Sun Xiaoping said: "Boss, this is the best." ”

Qiu Wenan also said: "Boss, everyone has wanted to listen to your lecture for a long time. ”

Li Tianfeng smiled and said, "Then it's decided, I'll give you lectures a few times a month." ”

Watching the two happily leave their office together, Li Tianfeng said in his heart, perhaps, often talking to you about the advanced design technology of aero engines, will be of great benefit to the improvement of everyone's overall design level.

…………

Smith and his entourage arrived as promised.

Liu Wei took several subordinates, all in a black Mercedes-Benz car, to pick up Smith and his party at Huangping Airport, and arranged for Smith and others to stay at the State Guest Hotel in Songzhou City.

In the evening, Li Tianfeng fulfilled his promise and personally invited Smith and others to dinner, enjoying a Chinese delicacy.

This is the second time Smith has come to Songzhou, and the second time he has come to Tianfeng Technology Company, and everyone is relatively familiar with each other, and the atmosphere of the dinner is good.

Smith and his entourage rested for one night at the State Guest Hotel, and the next day, we visited Tianfeng Technology Company for a day, on this day, Li Tianfeng was politely accompanied by the whole process, not only from all aspects of a more detailed introduction to Tianfeng Technology Company, but also took everyone to see the Qingshi manufacturing base.

After looking around, Smith and others obviously found the changes and progress of Tianfeng Technology Company compared with the last time, Smith seemed to be in a good mood, and his evaluation of Tianfeng Technology Company was very high.

On the first day of reception, the second day was inspected and visited in Tianfeng Technology Company, and on the third day, the two sides sat in a business conference room of the State Guest Hotel and began substantive business negotiations.

Smith did not hide the purpose of his trip, which was to be entrusted by the board of directors to order engines from Tianfeng Technology.

………

Today's three watches, the first one is sent! (To be continued......)