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Volume 1 Chapter 247 Test Drive

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    Nowadays, the turbine blade discs of engines have gradually changed from the original hard pursuit of their shapes to make their shapes more scientific and in line with the principles of fluid mechanics to more emphasis or search for related materials.  The materials used in turbine blade discs have already transitioned from alloy steel to nickel-based and titanium-based single crystal alloy materials. Now they are developing towards composite-based and ceramic-based materials. Advanced fighter jets from the United States and Russia also use carbon fiber composite substrates extensively.  In terms of materials, China is still weak. Not only does it not use carbon fiber composite substrates in large quantities, but it also does not have carbon fiber composite substrates. Even if it does, it dare not use them in large quantities, because the quality of domestically produced carbon fiber composite substrates is not very good, and they are not assured.  use.  Since Peng Huading participated in the development of the engine, after Peng Huading¡¯s review, they finally used domestic carbon fiber composite substrates on the engine.  But they still felt sorry for each other, so after assembling the engine, they did not rush to test it, but waited until Peng Huading arrived.  Peng Huading did not want to be too outstanding in materials, and compared with electromechanical technology, his material knowledge was indeed lacking. Therefore, he did not suggest how the relevant departments should produce the best carbon fiber composite substrates in the world.  Some improvement measures have been proposed for the base material, which will help to improve the domestic carbon fiber composite base material, but it is far from being extraordinary. The carbon fiber composite base material produced is still not as good as the world's most advanced carbon fiber composite base material.  However, he is still confident about this improved domestic carbon fiber composite substrate and knows that the domestic carbon fiber composite substrate can be used in engines.  It can basically meet the requirements of the engine.  In fact, for the sake of safety, although Peng Huading did not make better suggestions for improving the domestic carbon fiber composite substrate, nor did he mention the incredible formula and processing technology, he did make relevant suggestions for the structure of the engine, that is, let  The engine structure is adapted to domestic carbon fiber composite substrates.  It seems that this matter is ridiculous and seems to be putting the cart before the horse.  Because it stands to reason that materials should be suitable for the engine. Material producers should work hard to produce whatever materials the engine needs. If they cannot produce them themselves, they should go abroad to buy them.  How can anyone modify the engine because of concerns about the materials?     But.  Peng Huading's specialty is in design, and his institutional design is far beyond the experts of this era.  For him, modifying the engine structure is as easy as drinking water, if necessary.  If you have time.  He can even design products that are several grades higher than American and Russian aero engines.  The aircraft engine is now ready for test flight.  Peng Huading has adopted some new design technologies, changing the longitudinal supercharging commonly used in engines to transverse and longitudinal comprehensive supercharging, that is, a two-stage supercharging chamber is often used at present.  The air coming in from the air inlet is pressurized again and again by the compressor, and then sent to the combustion chamber for combustion. The high-temperature and high-pressure airflow drives the turbine blades to work, thereby generating thrust.  The engine designed by Peng Huading not only has two stages of supercharging, but also divides the second stage of supercharging annularly along the center of the turbine blades.  The radius of the turbine blade root is small and the linear speed is slow. The high-heat and high-pressure gas does little work here, so the gas demand is small and there is no need for rapid gas supply.  The top area of ??the turbine blade has a large radius and fast linear speed. The high-heat and high-pressure gas does a lot of work here, and the demand for gas is large. Rapid air supply can eliminate unnecessary turbulence.  It is conducive to improving the efficiency of the engine and which is conducive to improving the thrust of the engine. However, the disadvantage is that it is difficult to process parts and the accuracy requirements are higher.  ¡° Peng Huading¡¯s advantage lies in its strongest processing ability, easy precision processing of parts, and parts that are difficult for others to process can be easily obtained with his repair system.  As soon as Peng Huading got off the plane, Deng Guohong came up with several people to greet him.  "General Engineer Peng, thank you for your hard work." Deng Guohong stretched out his hand to hold Peng Huading's hand and asked with a smile, "How is life on a submarine, are you used to it?" Peng Huading smiled and said: "It's not bad. It's not like you don't know.  " Deng Guohong was able to say this in front of others and openly tell the story about the nuclear submarine. Peng Huading knew that the people behind him were well-connected and at least had the right to know such highly confidential matters.  Sure enough, when Deng Guohong introduced him, he understood that in addition to the people he had met before, the others were also great masters, such as the chief engineer or deputy chief engineer of the J-10, J-15, J-20 and other fighter jets, who were the generals who followed him.  He is also a major general or above.  One of the chief engineers smiled and held Peng Huading's hand and said: "Chief Engineer Peng, we have been waiting for you for a long time. We are impatient and have been looking forward to this day for a long time." No one knows what to call Peng Huading.  Well, if it were anyone else, they would call him Xiao Peng at this young age, but this guy is very skilled, and everyone else has to learn knowledge from him. To a certain extent, this young manHe can be called their teacher, but who has the nerve to call him Xiao Peng?  Peng Huading did not pretend to ask others to call him Xiao Peng, but said with a smile: "I'm so sorry. In fact, you just test the car directly. I only did part of the work, and you did most of the work. Come on  I'm really embarrassed to greet you." A general next to him laughed and said: "General Manager Peng, are you so embarrassed? Who doesn't know that you modified several key parts of the engine? You can't come here.  , Even if the test runs have good results, we still know it and don¡¯t know why. Instead of guessing, it is better to wait for a while I heard that you have confused the British and Swedish navies. Isn¡¯t it great?  ?" Peng Huading smiled and said nothing.  A fleet of luxury cars drove from the airport and headed straight for an aviation research institute.  Two newly assembled engines are lying quietly on the test bench more than a hundred meters apart, and some technicians are still making test preparations.  The entire test workshop was surrounded by armed soldiers. Even outside the test workshop, there were posts every three steps and one sentry every five steps.  Deng Guohong accompanied Peng Huading into the test workshop with other experts and generals. The commander-in-chief of the engine test walked up to Peng Huading and said: "Report to the chief, all preparations for the test are ready. Please give instructions on the next step!" Peng Huading said with a smile:  "It's up to you.  If there is nothing else, let's start the test run." The commander-in-chief looked at Peng Huading in surprise, and other technicians in the test workshop also looked at each other: What is the rhythm of this, and how does it compare with the previous test run?  no the same?  In their opinion, Peng Huading's answer was too hasty. In any case, for such an important test, you should first ask about the situation and look at the key data. You should not order it to start until no more problems can be seen.  No?  How can anyone order to turn on the phone as soon as they get off the car?  Peng Huading asked with a smile: "Why, are there any places you haven't prepared yet?" The commander-in-chief quickly said: "No, no, if you don't first" Peng Huading interrupted him and said: "Since you said you are ready,  I believe you are ready Let¡¯s test it first. If there is a problem during the test, we will talk about it and solve it.¡± The commander-in-chief was dumbfounded and thought: How can this happen? This aero-engine test is not a child¡¯s play, with such power.  Big, if something happens, it's not a trivial matter. It may even explode. If the explosion is more powerful than a heavy aviation bomb.  In Peng Huading¡¯s view, their careful preparation must have been carried out in full accordance with the test procedures and test outline. Every step and every process must have been strictly inspected and signed by the relevant person in charge, so there must be no problems.  I am not very clear about their testing procedures. Even if I calm down and take a look now, it is just pretending. How can you pick out the bones from the eggs?  Besides, his electromechanical technical level is very high, far higher than the experts and masters around him. If there is a problem during this test run, he can hear the problem just by listening to the sound of the engine, and can immediately order a shutdown for maintenance.  Danger can be nipped in the bud.  ¡°In this case, why waste time on showing off.  Seeing Peng Huading¡¯s insistence, the commander-in-chief stopped insisting. After Peng Huading and others entered the safe data observation room, he immediately ordered the technicians to start the power supply for the first engine¡¯s test bench.  As the engine rotor slowly rotated, the blower arranged in front of the engine air inlet also began to rotate, and it rotated faster and faster, and soon made a rumbling sound.  The blower apparently simulates the wind supply of an airplane flying in the air.  As we all know, when a fighter jet starts to take off, as the speed of the aircraft becomes faster and faster, the wind speed at the air inlet will naturally become larger and larger.  The engine test is carried out on the ground test platform, and it is impossible to move the air inlet. A blower must be relied on to simulate the airflow encountered when the aircraft is flying.  Soon, the engine speed became faster and faster, the engine's oil supply channel opened, and aviation kerosene began to enter the engine through the oil pipeline and burned in the combustion chamber.  The engine starts to idle, just like the aircraft is parked on the ground and has not yet entered the take-off procedure.  In the data observation room, Peng Huading was invited by the staff to sit down in the main position. There were three computer screens in front of him, which respectively displayed the operating data of the engine, the operating data of the support equipment, and the environmental data.  In addition to the display screen, there is also a microphone for issuing commands and a red button for forced shutdown in front of him.  Obviously this is specially equipped for him by the test team, and it also gives him the highest power that no one here has: he can interrupt the test at any time.  Others are either gathered around him orHe turned his head and looked at the large display screen on the wall.  The large display screen is also facing directly in front of Peng Huading, and it also displays the data of the three screens in front of Peng Huading.  (To be continued, please search Piaotian Literature. The novels will be better and updated faster!
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