To be able to participate in the discussion of the meeting at this time, it is definitely the company's bull-level talents, for the problem of entering the international sales market of the fourth-generation aircraft as soon as the fourth generation aircraft mentioned by Chief Engineer Song, almost all of them are in favor of raising their hands, no way, who let us AVIC Southwest develop from the beginning to engage in export sales. Pen & Fun & Pavilion www.biquge.info

A company engaged in export sales has developed and grown, that is destined to be the export and international market demand deeply engraved into the corporate culture, AVIC Southwest of the five major aircraft units, United Passenger Aircraft Company, Guifei, Hongdu, Chengfei, which of them is not in the export market to make a profit.

And at this time, it must be all hands in favor of the launch of the light four project, but at this time, Chief Master Sun, who has not spoken, raised a question.

As the chief designer of the J-18, now the 18 has entered the critical flight test period, but the turbofan 12 over there has not yet completed the final finalization and acceptance work, so Chief Engineer Sun's problems with the engine during this period of time can be regarded as a variety of nightmares lingering.

Now as soon as I heard that the light four project is about to be launched, Mr. Sun also remembered the problem about the engine for the first time, this year there is no reliable engine is absolutely not good, and now the aerodynamics of the light four project has been roughly blown out, about the news of the new generation of high-thrust turbofan engine, this seems to be no news!

"Several predecessors have devoted a lot of effort to the fourth-generation stealth fighter project, and I personally think that the light four-generation project should be launched, but now there is a big problem, what should we do with our high-thrust and small-bypass turbofan engines? This can't be like our J-18 again, the aircraft has been tested for two years now, and the turbofan 12 engine has not been delivered yet, so this engine problem is very critical! ”

Although the republic of this plane has made a huge leap forward in aero engines compared with the previous one, at least it can be regarded as a relatively past achievement in the field of turbofan engines, and it can also ensure the installation and use of all military aircraft in service.

But when it comes to high-thrust military turbofan engines, this is really only a cry: "Hey! This is very right, we want to engage in heavy fourth-generation aircraft, light fourth-generation aircraft, now if there is no high-thrust turbofan engine is definitely not possible, although the Taihang engine has completed the test work of the core machine, but this engine will have to be finalized in about 2000 years, our high-thrust military turbofan engine road is still very long! ”

Song Chief Teacher, who followed Mr. Sun, also sighed constantly, 611 over the 10th and Taihang are more closely related, so the progress of Taihang is also well understood, but this time the object of his concern is not compatible with the theme of the meeting, Taihang, a standard third-generation machine with a large push turbofan, and the fourth generation machine requires a large push turbofan There is a big difference in performance, this thing can not be used in the fourth generation machine.

But Yang Hui is too lazy to listen to others, and now it is necessary for him to announce one thing: "First of all, Taihang's engine must not be used in our fourth-generation aircraft, and even due to the progress of Taihang, it may not even be qualified for the installation and testing of the early prototype of the fourth-generation aircraft, in order to ensure the safety of our fourth-generation aircraft prototype, I am afraid that the early test aircraft will not be able to use 31F." But when it comes to the finalized engine! We have to use the fourth-generation turbofan, so we are going to start the development of the fourth-generation turbofan now. ”

To say that the development of the four generations of push, this project can be traced back to at least the early 90s, when Yang Hui agreed to the development of the four generations of push, for which he also specially approved the pre-research project of the four generations of push, until now 94 years have passed more than three years, many pre-research technologies have passed the technical stereotype inspection, and it is time to officially start the project.

"Our fourth-generation push project has started pre-research work a few years ago, not long ago 624 over there Liu Chief Engineer has sent a message that the core machine pre-research of several new technologies have been completed, the new generation of high-temperature turbine blades have also passed various performance tests, the turbine disc using new powder materials can also match the working temperature of the blade, so now 624 has approved the start of the fourth generation of the core machine design work."

Speaking of a new generation of high-temperature turbines, it is really a typical money-throwing out, first of all, AVIC Southwest's 625 Manufacturing Technology Institute in the imperial capital and the high-temperature materials division of the Institute of Metal Materials of the Chinese Academy of Sciences, the two sides even in the mid-80s DD-3 completed, once again on the new generation of high-temperature single crystal alloy research work, and DD-32 is to get good things after throwing money.

Of course, this DD-32 is definitely not a good material, at least the biggest difference between this thing and the previous DD-3 is that this thing contains the legendary artifact: rhenium.

It is precisely because of the addition of the new single crystal material and 3.7% rhenium metal that DD-32, a new generation of superalloy, can reach a total turbine temperature of 1680 degrees Celsius after using various hollow blades, forced cooling and high-temperature coating.

To be honest, being able to have a total turbine temperature of 1680 degrees Celsius is a pretty big step forward, although it still hasn't been able to reach the F-119. The state is generally more than 1700 degrees Celsius, but this is definitely the latest high-temperature single crystal blade that can be used in the Republic at present, that is, in this case, the cost of the blade is ignored by both the development side.

Although the manufacturing cost of the DD-32 turbine blades is more than five times that of the DD-3, there is no way, for the research of the fourth-generation high-thrust turbofan engine, this must be endured.

Moreover, when Yang Hui heard that the manufacturing cost data of DD-32 was sorted out at that time, he directly frightened the army, and the military representative was stunned that he would not sign to let this material enter the actual use, and kept shouting that 625 was willing to squeeze all the army's money.

There is no way, the army of our republic is typically poor, the cost of the previous turbofan 10 engine was high enough, and the later turbofan 12 was on a new level, and until the time of the DD-32 this time, according to the calculation, the preliminary conclusion is: the cost of the core engine of the fourth generation of big push alone is to top a turbofan 12.

In the end, there was really no way, so Yang Hui personally called the army and explained a long time. From the unlimitedness of the future economic development of the republic, and the fact that the military spending after 2000 will definitely increase sharply year after year, and then to the last four-generation core aircraft after large-scale production, the cost can be reduced, compared with the cost of foreign aero engines, this can be regarded as opening up the army, and finally reluctantly agreed to use DD-32 materials on the four-generation core aircraft.

Despite this, the new high-temperature turbine still can't reach the F-119's more than 1700 degrees Celsius, so the original four-generation big push plan to achieve the same 18 tons of thrust as the F-119 is definitely not possible, or 624 After various research, it was given that a core machine that can guarantee the development of a 17-ton big push can be designed. (To be continued.) )