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Chapter 665 HX-6-11 core machine

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    ???????????????????????????????????????????????????????????????????????? No matter how impatient the Ascendas Aviation Group is, there is nothing the Ascendas Group can do. The development cycle of the aero-engine is there, and the Ascendas Group cannot do it as quickly as it wants.

    What¡¯s more, the difficulty of developing a medium-thrust aeroengine has skyrocketed compared to previous models. If nothing else, the hx-4-1 core engine has developed to the third generation, and the temperature in front of the turbine is only 1280 degrees Celsius.

    But this temperature does not even reach the minimum indicator of a 6-megawatt core machine.

    You must know that the performance indicators of the 6-MW core machine formulated by Ascendas Group, that is, the engineering model hx-6-11 medium-sized core machine are:

    Air flow 11kg/s

    The compressor pressure ratio is 8.4

    The total gas temperature at the combustion chamber outlet is 1600~1650 Kelvin

    Turbine stage 1

    Design cycle power 6 MW

    Kelvin is the internationally accepted unit for calculating the temperature in front of the turbine. When converted into degrees Celsius, 1600 Kelvin is approximately 1326 degrees Celsius.

    In other words, the entry-level standard of the hx-6-11 medium-sized core machine is higher than the top-end version of the hx-4-1 core machine.

    ????????????????????????????????????????????????????????????????????????????????????????????????? transactions require a large amount of money and experience in materials, processes, engineering, design, and manufacturing, which cannot be achieved by just drawing a blueprint.

    Because of this, the development work of the HX-6-11 medium-sized core aircraft has been launched by Tengfei Group. At the same time, it has been included in the 863 key development projects and the "Eighth Five-Year Plan" projects for key support.

    But despite this, it will take at least five years to come up with an engineering prototype. If there are twists and turns during this period, seven or eight years is normal, and even more than ten years is not surprising.

    No way, just improving the heat resistance of turbine blades is not easy to overcome. It requires the comprehensive use of multiple methods to achieve it. It involves several categories and dozens of disciplines, which is a great test of the comprehensive strength of the research and development unit.

    " Ascendas Group has a serious lack of experience in this area and can only work with other scientific research institutes, key universities and other supporting factories to jointly tackle key problems. The problem is that many technologies are blank in the country, and if you want to complete them, you can only start from scratch and slowly explore.

    For example, in order to increase the heat-resistant temperature of nickel-based alloy turbine blades, it is necessary to apply a ceramic coating on the surface. Because ceramics have high heat resistance, they can effectively protect the turbine blades from being burned by high temperatures.

    However, this kind of ceramic coating is not a ceramic tile at home that can be formed after being put into a fire. Instead, it needs to withstand high temperatures and must have a certain degree of toughness and strength, because the coating not only has to withstand high temperatures, but also has to withstand turbines.  Strong centrifugal force during high-speed rotation.

    Ceramic materials are notoriously fragile, so how to overcome their fragility so that they do not fall off or break when the blades rotate at high speed, and are easy to process, can drive experts and engineers in this field crazy.

    And this is just a small microcosm of the convenience of various technical research projects for the hx-6-11 medium-sized core machine, including the application of integral wheel discs, compressor integrated bearings, integral blisks, and metal matrix composite materials

    Almost every item can drive people crazy.

    So even if we want to make Ascendas Group faster, we can¡¯t even do it.

    Success Aviation naturally knows the actual situation of Ascendas Group. Although it is impatient, it can only wait. Fortunately, the so-called light fighter project is only in the theoretical demonstration stage. Even if Pakistan makes up its mind, the engineering design will take several years to complete, so it is not optimistic about Success Aviation.  For aviation, the time is quite good.

    ¡°However, the Pakistani military delegation did not know about these matters. Of course, even if they were informed, the Pakistani military would not report it to Ascendas Group.

    Because they want mid-level trainers and light fighters with excellent performance, not individual aero engines.

    What¡¯s more, in terms of the power of light fighter aircraft, Chengdu Aviation has not even scratched the surface, and the Pakistani military delegation does not need to take the pole.

    As for the power of the intermediate trainer aircraft, China may not be able to get American-made engines for some reason, but Pakistan has a very close relationship with the United States because of the Soviet Union's invasion of Afghanistan. It is just a small thrust engine, and it is not free. The Americans do not  As for not giving face, there is no power vacuum problem.

    Therefore, in the intensive itinerary of the Pakistani military delegation, there was no such thing as visiting the Ascendas Group.

    Originally, this matter would have been settled according to the planned itinerary, but it turned out that Major General Zarif, who witnessed the shocking scene of Yun-15, as the attach¨¦ of the Pakistani Embassy in China, was precisely the intermediary between the Pakistani military delegation and the country.  Moreover, Major General Zarif and Lieutenant General Rahman, who led the delegation, were classmates in the military academy. They were later sent to the United States for further studies together. After returning home, they fought side by side through New Delhi.

    Together properlyWe passed through the window, carried guns together, and vaguely even went whoring and so on together, just pure good friends.

    So when Zarif met Rahman, he began to praise the Yun-15, and then talked about the shocking scene with photos, and finally came to the topic, hoping that Rahman could go to the Yun-15 production plant.  Look, it would be nice to order some back.

    Rahman was still able to hold his own once and twice. After all, the itinerary was decided in China, not to mention that the entire Pakistani military delegation of more than 40 people belonged to different departments and factions. Although Rahman was a representative  The leader of the group, but his real power of control is not strong. Because of this, Zarif's first few attempts to persuade him were all made fun of by Rahman.

    I thought it would be over in this way, and then I would go directly back to my country for business after completing the itinerary.

    ¡°It turns out that Rahman far underestimated Zarif¡¯s perseverance. If once or twice doesn¡¯t work, then three or four times. If he still doesn¡¯t agree, just treat it as a chanting and torture until Rahman nods.

    That¡¯s all, Zarif also took advantage of his familiarity with China to win over people in the delegation with China¡¯s native products that are in short supply in Pakistan.

    As the saying goes, eaters have short mouths and takers have short hands. Even though they are some local products, they still save face. What's more, Zarif's request is not excessive. After visiting Berjaya Airlines, he stopped by to see Ascendas Group.

    And the reason is also very formal. Let¡¯s examine the production situation of the replacement power of the intermediate trainer aircraft.

    As for the inspection of aviation power, we did not go to the Ascendas Aviation Power Plant of cotton, but to the Xiping Plant of aircraft manufacturing. No one cares about these details. After all, they are all Ascendas Group. Isn¡¯t it the same everywhere?  It's like taking the local product in your hand, it's not useful to anyone!

    ¡°In this way, Zarif relied on his old connections, old classmates, old locals, and his transcendent status as the military attache stationed in China to insert an unplanned part into the military delegation¡¯s scheduled itinerary.

    So this is how the Pakistani military delegation visited Ascendas Group.

    However, because the Pakistani military delegation is not monolithic, and some people give Zarif face, naturally there are some who do not buy it. For example, Professor Ali Khan from the Department of Aeronautics and Astronautics of Karachi University of Technology and his two assistants expressed their disapproval of Zarif.  The approach is scornful.

    I feel that this is another internal transaction within the military. Not only did I oppose the change of itinerary, but I also publicly accused Zarif of using his power for personal gain. However, his arm could not twist his thigh. Professor Ali Khan was upright, but it was still not enough in front of the military, so even if  Opposition is like farting, no one pays any attention to it.

    This made Professor Ali Khan helpless and annoyed. In anger, Professor Ali Khan, who had not come with him, also came to Ascendas Group. For no other reason than to see with his own eyes what Zarif had boasted about.  How did the bubble burst?

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