After seeing Mr. Xu close the notebook, Jiang Yan finally stopped and took a sip of water, during which Mr. Xu also rubbed his writing, writing a little sore wrist, this good guy wrote for hours, this wrist is not sore.

"Actually! I have a little other opinion about the engines of the aircraft. After smoking a cigarette, Jiang Yan continued to speak.

"Can you elaborate on what you think?" Mr. Xu asked.

"We know, this woolly bear is generally an aircraft design engine, although he is the closest to the aircraft, but such a financial investment is quite large, compared with financial resources, we can't afford to fight, I thought, is there any other good development ideas, when the woolly bear studied abroad, I have read a large number of documents, and found that Eagle sauce their aircraft engine is based on the core engine research and development model."

"Core machine?" Mr. Xu asked Jiang Yan in surprise.

Hearing Jiang Yan ask, at this time, he realized that there is no such concept of core machine in the world. Therefore, Jiang Yan immediately explained: "I will develop the core components of the engine composed of compressor, combustion chamber and turbine to shorten the development cycle of new engines, improve reliability or develop various types of gas turbine engines. It's called the core machine. ”

Without waiting for Mr. Xu to ask a question, Jiang Yan continued: "The core engine, as the name suggests, is the core of the aero engine, which mainly includes three parts: high-pressure compressor, combustion chamber and high-pressure turbine. They are subjected to huge loads and extremely high operating temperatures in working conditions, and the working environment is the harshest, with extremely high requirements for strength and reliability. Take the first-stage high-pressure turbine rotor as an example, its operating temperature exceeds 1500°C, and the centrifugal load on each turbine blade is close to ten tons when rotating at high speed, and the average power output of each high-pressure turbine blade is equivalent to the engine power used in a bus. ”

"In addition, the core machine should play an important role in compressing air, combustion heat generation and energy conversion, and whether the performance of a core machine is good and whether the service life is long is the key to measuring whether an aero engine is advanced and reliable."

"I think so, can we design and research a general-purpose core machine, so that an excellent general-purpose core machine can be used as a platform to develop a variety of types of engines.

For example, a small general-purpose core aircraft can be used as a platform to design a turboshaft engine for helicopters, a small turbofan engine, or a short-life turbojet engine for hypersonic weapons; Using the large general-purpose core aircraft as a platform, it is possible to develop a high-bypass ratio turbofan engine used in civil airliners or military transport aircraft, a high-thrust-to-weight ratio turbofan engine used in fighter aircraft, and even a heavy-duty gas turbine used in ships. ”

In this way, we can eat more than one fish, that is, an engine can be derived from other uses, which not only saves time, but also saves a lot of money, why not!

In fact, Jiang Yan is not wrong at all, in the era of Jiang Yan in later generations, aero engine designers often spend more time and money to develop excellent, versatile core engines, and based on the excellent core engine developed as a platform to design and derive a variety of engines. This not only ensures the good performance of multiple engines, but also reduces the total investment in the development of these different types of engines.

For example, the D-36 aero engine, developed by the Woolly Bear Advance Design Bureau in 1974, was originally used in the Yak-42 regional airliner. The engine has good performance and wide adjustment margin, so based on the core engine of this engine, the D-18 engine for the world's largest transport aircraft An-225, the D-136 engine for the world's largest helicopter with the largest take-off weight Mi-26, and the D-436 engine for large passenger aircraft. At present, aero engine design units basically adopt this technical approach to ensure the advancement of aero engines, and control the cost input and development cycle as much as possible.

Jiang Yan also felt that this is the optimal solution for our current development, and it can even drive the development of other engines, such as ship engines, and can change the method to increase our other strength.

"No, Xiao Jiang, you wait a while, wait a minute, this is what you came up with." After closing the notebook, Mr. Xu looked at Jiang Yan in shock, he wrote down what Jiang Yan said just now, and the more he thought about it, the more he felt Jiang Yan's incredible.

The previous invention of the airplane should be regarded as a whim! But now what he said, but directly pointed out the direction of the development of aircraft engines, as an aircraft auditor and aircraft engineer, he knows the significance of this suggestion, it can be said that if you really follow Jiang Yan's discovery, the benefit is not only one aspect of aviation, basically it will involve many, many aspects, this is a development proposal.

This is not just a genius, this Jiang Yan is simply a demon, but fortunately, this demon is a flower planter.

"No, Mr. Xu, why do you look at me like this, it feels weird." After being looked at by Mr. Xu for about half a minute, Jiang Yan felt uncomfortable and couldn't help asking.

"No, I feel that your kid is too wicked, why don't you come to our air port to develop." Mr. Xu asked.

"Forget it! I was comfortable in our institute and didn't plan to change places. Jiang Yan refused without thinking about it.

At this time, there was a knock on the door of Mr. Xu's office, and then Mr. Xu's secretary walked in.

"Mr. Xu, Mr. Jiang's secretary Xiao Gong came to find Mr. Jiang."

Hearing that his secretary was coming to find him, Jiang Yan immediately stood up and said to Mr. Xu: "Mr. Xu, let's have a chance to discuss again, I'll see what the secretary has to do with me." ”

Seeing this, Mr. Xu didn't want to hold on to Jiang Yan all the time. Although he is full of intellectual curiosity, he also understands what it means to be too much.

Jiang Yan has talked to him enough today, and being able to take such a long time to say so much to him is already very caring and face-saving, and he can't be satisfied. Also, Mr. Xu felt that he needed to hurry up and digest the things he got today.

There are a lot of things in this, I don't understand it a little, I have to hurry up to ventilate the above, and when necessary, ask Mr. Lu to come over and discuss with the experts of the Third Machine Department to see the specific course of action.

In addition, the information and data he recorded today are too important, he has to find a safe place to send these materials, if he loses them, he is afraid that he will be a sinner.

In addition, he felt that he must report today's events to the higher-level leaders on a 1510 basis.

After Jiang Yan left the office, Mr. Xu thought about it, opened the safe, took out a delicate box with a password from it, opened it and looked at the note inside, picked up the red phone on the table, and dialed it according to the phone number on the note.

After making the phone call, about an hour later, three military jeeps, carrying more than a dozen guards with loaded guns and live ammunition, picked up Mr. Xu and the information in his hand, and they went directly to Shengjing Airport, a plane was already waiting there, and after Mr. Xu got on the plane, the plane flew directly to Shengjing.

As soon as Minister Lu arrived at Shanhaiguan, the train stopped there, and a soldier came up to find him, and then Minister Lu got off the train and got on the car that had been prepared, and the car drove towards Sijiu City.

Chief Engineer Lu, who was far away in Rongcheng, after receiving a phone call, explained his affairs, and followed the people who came to pick him up and hurried to Rongcheng Airport, where a plane was parked, and most of the planes were experts from the air port.

(End of chapter)