The new Southwest Science and Industry Corporation has begun a new journey, the CG-2000 engine here has also entered the most important project node, from 85 years to the engine for technical architecture design, and after 624 institutes, Southwest Science and Industry work together to develop a new core machine, coupled with the MTU side of the development of cold-end components, has taken a lot of time.

Since the mid-88 years of the engine, the engine has been tested for cold start of the engine according to the development progress, and then the first ignition start of the engine and the performance test of each auxiliary system have been carried out continuously, until this special moment.

Surrounding the safety zone near the engine test bench are the southwest science and technology technicians and leaders who have been paying attention to the CG-2000 engine, the assistant developers of the German MTU company, and the MPC-75 passenger aircraft power procurement office of Xifei.

Southwest Science and Industry does not have a high-altitude platform, but the most basic test bench is still there, and this test bench still belongs to the top one in China, when the engine is hoisted on the test bench and fixed, and then various pipelines, data test sensors are installed on the engine one by one, when the installation and commissioning work is completed, the secret hemp line has long been dazzling, Yang Hui has reason to believe that even if it is the staff who installed the sensor just now, It's not always easy to tell what data is being transmitted over each unused line.

"Old director, the experimental equipment in the institute is really changing every day, I remember the last time I came here, the institute has not updated this set of data acquisition equipment, right? It must have cost a lot of money to get it done. ”

Yang Hui's eyes are more vicious. At a glance, I saw that the engine test center was a shotgun change, and all kinds of experimental equipment were relatively complete. The performance level of the equipment can definitely be regarded as the international advanced level, which is also the top existence in the domestic aero engine development units.

That's a good thing to say. I heard that the institute has invested in the purchase of these belongings as soon as there is excess funds in these years, and the current basic equipment must be the most advanced in China. ”

The person who spoke was very proud, and after Yang Hui took a closer look at his age, he found that this guy was younger than himself, as if he had just walked out of school, and he thought that he should be a newly recruited college student. It is a typical person who has people, money, and projects, and is simply a winner in life.

When the new college students see these devices that they have never seen in the university before, it is natural to say that the equipment of the two institutes is the best, the best, the most complete, and the most complete in China

But as an old scientific researcher, Chief Engineer Wen lost no time in saying: "Yes, compared to when we were five years ago, the equipment we use now is almost unimaginable, but it does not mean that our equipment is the most complete, for example, we still have one set of the most important equipment, which is now only owned by 624." In a few months, we will pack up and prepare to take root in 624 for a long time, and then you will know what it means to have a sky outside the sky. ”

Needless to say, you will know when the time comes, and the most important thing now is to complete the CG-2000 engine test task on the bench.

And with the arrival of Chief Master Wen in his post again. The ATS engine starting unit, which was specially developed for the CG-2000 engine, was also provided by MTU for the first time, and of course, the ATS system could not be started on its own. It's just a gas diversion device, and such a big guy is going to work. The auxiliary power unit APU is absolutely indispensable.

Strictly speaking, the auxiliary power unit is very different from the main engine, which is actually an ultra-small thrust aeroderivative gas turbine. Early jet-powered airplanes didn't actually have an APU system, but people could also fly for fun, so this thing was not a necessity.

The real large-scale use of this device is after the jet large passenger aircraft is put into use, after all, those large jet airliners need to use a lot of electricity, which is why the APU system appeared, and the APU at that time was only a single one. It was only a separate power supply system outside the engine, until later, with the continuous expansion of the engine thrust, after the emergence of ten tons and twenty tons of big guys, it was absolutely impossible to start the engine and then use the early motor to drive.

At this time, the APU system has one more task, after the small APU system is started by a small motor, the gas turbine will generate electricity, and will also produce a large amount of high-temperature gas, which is drained to the main engine through the pipeline, and then the main engine is started through the ATS starting unit, so that the engine can be started.

It looks like a hassle, but this is only a high-thrust turbofan engine needs equipment, in fact, the current CG-2000 engine can be started without this thing, and the use of high-power electric motors can also drive the engine to start, but this is not the optimal design solution.

The CG-2000 engine is to be installed on civil airliners, which must be equipped with APU units due to huge electricity demand. Since there must be APU system units both horizontally and vertically, if the CG-2000 does not make good use of this thing, it will simply be sorry for the country and the people.

Looking at the engine on the entire test bench in accordance with the predetermined procedure, first start the APU, then start the ATS, and finally complete the whole engine start, the whole action is like a cloud of water in the same industry, you can obviously see that there is no small wave in the starting process of the engine.

After that, under the full supervision of Chief Wen, the engine began to carry out various tests continuously, and now it has not yet reached the most exciting stage of the engine's full thrust test, Yang Hui can also take this time to ask other things.

"Very good design, CG-2000 uses APU-assisted ATS system to start the main engine, which will be the general trend of aero engine development in the future, so our turbofan 12 must also use this starting method, so I want to ask if the company can provide self-produced qualified APU system now?"

Large aircraft need to use APU systems, so it is necessary to use this kind of thing for military mid-thrust turbofan engines? After all, military aircraft are every inch of land, there is absolutely no extra space, and where is there a place to install the APU system, not to mention that the APU system also consumes valuable fuel, and these huge "wastes" are definitely crimes.

That's right, early military fighters really didn't need this kind of thing, and the J-5.6.7 of the Republic of China did not have this design, isn't it also a generation of famous aircraft?

That being said, but how much electricity is used in the era of the J-5.6.7, not to mention that the whole aircraft does not have airborne radar, it does not even have decent electronic equipment, that is, a pure machine, with a little thought of from the main engine, it can meet all the electricity needs.

However, in the era of the more modern third-generation aircraft, there are not only high-power airborne radars, but also energy-consuming airborne electronic equipment, and the combined power consumption of these devices is considerable, which requires a special APU unit. Therefore, Yang Hui also asked about the progress of the APU system independently developed by Southwest Science and Industry at this time.

"Don't worry, the APU system you mentioned was obtained by our United Aero Engine Company through the bidding in a dignified manner, and now it is constantly being tested, and it will take another half a year at most to finalize, and this development team is still the guy you developed the model aircraft engine back then, and it is not bad now." (To be continued.) )