Snowflakes the size of five-cent coins swirled and fell from the gray-white sky, and it took only one night for the whole of Mori Kyoto to be shrouded in a white blanket of silver.

On Wenyi Road, which is close to the north gate of Nanhu Park and Science and Technology Park, an orange snow plow and a white Jiefang 141 truck with several big characters printed on the body of Nanhu Science and Technology Park slowly drove from east to west.

A large group of children on vacation are extremely curious to follow this set of automatic snow removal equipment, and the sanitation workers working around the train group occasionally wave large bamboo brooms used for snow removal to drive away the daring bear children who are close to the snow cutter.

In the 80s and 90s of the 20 th century, the task of removing snow in winter in the northern part of the Republic has always been to be contracted to units, and the snow removal work on the main roads in the urban area and its affiliated streets was carried out by the major units on both sides of the streets.

With a stroke of his pen, Liang Yuan drew a circle near the southern river in Shengjing City, basically occupying the entire Shenshui Bay, so the snow removal task of hundreds of kilometers of streets in the jurisdiction of Shenshui Bay naturally belongs to the Science and Technology Park.

In Shengjing, the entire Yuanjia is not even counting the gatekeepers, and there are not enough 20,000 people, even if the whole line is suspended, all the people are dispersed to hundreds of kilometers of snow removal sections, and one person has to be responsible for six or seven meters.

In the first two years, Liang Haiping came forward to call on the brothers of the Road Bureau to support the winter snow clearing task of the Science and Technology Park.

Lu'an alone has 5 to 6,000 idle laborers, and under the temptation of one person and one barrel of soybean oil, Lu'an has become a special winter snow removal team in the science and technology park.

However, at present, the large-scale production of Chinese character pagers for Hong Kong-based power collectors is imminent, and the idle Lu'an will soon become history, and Liang Tuhao, who has been wide, waved his hand and approved $800,000 to import five medium-sized snow plows from the Federal Republic of Germany.

The only dissatisfaction is the loss of the snow removal soybean oil subsidy for Lu An. In the words of General Manager Lu'an, if the $800,000 snow clearing fee is given to Lu'an, it will be enough for Lu'an to contract the snow clearing task of the Science and Technology Park for 20 years.

However, the mayor in charge of Shengjing's municipal affairs is very supportive of the choice of the science and technology park, believing that these five automatic snowplows have effectively enhanced the modern image of Shengjing City.

Liang Yuan stretched hard, walked to the window and gently pulled, and the hotel exterior window equipped with pneumatic support rods slowly opened outward.

The opening of the exterior window was positioned to the width of a palm, and a cold wind mixed with a few snowflakes squeezed in from the window.

The house at home is still being renovated. Liang and Ning's families did not return to the nearby Scientist Garden, but asked for two suites at the Shangri-La Hotel as a temporary residence for the previous year.

"Open the window in the big winter and blow the wind, be careful of catching a cold. Li Yuanling's voice sounded from behind Liang Yuan.

"It's hot in the room, you can't turn on the air conditioner. Liang Yuan muttered.

Before Liang Yuan could turn around, a thick down jacket wrapped himself tightly.

"At first glance, I knew that my mother was my own mother, just now I was blowing the wind in the window, my father rolled his eyelids and didn't pay attention to me, and I went directly into the bathroom, as if I picked it up. ”

Someone unscrupulously patted his mother's ass.

Li Yuanling smiled proudly and pinched Liang Yuan's ear casually. smiled and said, "How is it, Mom's boiler is burning well." ”

Originating from Spey gas turbines, the ED125 gas generator set produced by the Science and Technology Park was put into trial operation with the delivery of Shangri-La Hotel and Scientist Garden, and the heating power of Shangri-La Hotel comes entirely from the waste heat generated by the ED125 unit.

Named the first phase of the Changbai Experimental Power Station, the project has four ED125 gas turbine generator units with a full power of 12.5 MW per unit, with a total power generation capacity of 50 MW, which is enough for the daily office power of Shangri-La Hotel, Scientist Garden, Lego Water Park and Science Park.

After three years of research and development, Brilliance Power led by Li Yuanling has thoroughly mastered the Spey turbine system, and two ED120 generator sets sold by Brilliance to Lanhua two years ago have been topped with twin rotor Spey aero engines. This in turn forms a gas turbine unit for ground power generation.

In the latest ED125 gas generator set, Li Yuanling, who has an outstanding talent in fan design, completely abandoned the original low-pressure intake fan of Spey Aero Engine, which has as many as five stages. The whole section of low-pressure compressor is divided into two, into a three-stage low-pressure compressor, a three-stage medium-pressure compressor, if a little adjustment of the high-pressure compressor part is added, the new ED125 gas turbine generator set from a double rotor type to a three-rotor in one fell swoop.

Compared with the two-rotor unit, the three-rotor unit has more medium pressure compressors, and the air intake of the whole unit has increased greatly, under the condition that the design of the core machine remains unchanged. More intake means lower pre-vortex temperature, while lower pre-vortex temperature means longer service life and greater potential for power gain.

Of course, lower fuel consumption and greater unit suffeuring due to smooth air intake are also one of the advantages of the three-rotor design.

What's more, the ED125 gas turbine is independently produced by Yuanjia System from the simplest screws to the most technically difficult gas guide vanes.

Although a small number of heat-resistant alloys are produced by means of laboratory trial production, this is a milestone breakthrough for Yuanjia's subordinate aviation industry system. It represents that Yuanjia has a foundation for gaining a foothold in the aviation field.

For Li Yuanling, who has already completed the three-rotor Spey generator set on the ground, there is no insurmountable technical difficulty in applying the three-rotor technology to Spey aero engines.

What does this mean?

If heat-resistant materials are the material basis for the excellence of aero engines, then the fan is the core of aero engine design, and the name jet engine determines that air flow is the most important design index for aero engines.

Therefore, the blades and the fan composed of the blades have become the focus of Li Yuanling's most energy in the past three years.

Swept blades, wide-chord fans, axial flow rotors and three-rotors have become the most critical key reserve technologies of Brilliance Power.

Focusing on the air intake interval of Spey's core machine and Brilliance's key reserve technology, Li Yuanling has developed thousands of fan models for large-scale data verification, and overcome a series of basic problems such as the stall of the blade tip of the swept blade, the surface pressure analysis of the rotor of the axial flow stage, and the calculation constant of the subsonic range of the wide-string fan.

It can be said that at present, Li Yuanling is waiting for the supercomputer to go offline, and verify the correctness of the empirical formula that Li Yuanling has explored through a large number of experiments in the past three years through the powerful computing and analysis capabilities of the supercomputer.

If Li Yuanling's preliminary work is verified to be correct, then it can be said that Brilliance Power has single-handedly conquered the core of the field of aero engine computer simulation.

Among the new technologies, the successful application of single axial flow stage size vane rotor technology is enough to shorten the length of Spey's two-stage compressor by 40%, even without considering the improvement of air intake efficiency, a large amount of weight reduction alone can make a bright improvement for the thrust-to-weight ratio data.

Taking Rolls-Royce's civil aircraft engine product line as a reference, the Spey 512 with a thrust of 55KN is the previous generation of Rolls-Royce, while the popular Rolls-Royce product is a Thai aero engine with a thrust of 62-69KN, and the RB700 series with a thrust of up to 66-95KN is the future of cooperation between Rolls-Royce and the Federal Republic of Germany.

On the basis of Yuanjia's existing heat-resistant materials, the use of swept fans, three rotors and some large and small blades designed Spey civil aviation depth modification, to obtain 20%-30% thrust increase is a very reasonable technical index progress, once successful means that the thrust of the civil Spey reform will reach 66KN-71KN.

However, due to the lack of heat-resistant material performance, Yuanjia Hangfa is certainly inferior to Rolls-Royce's RB700 series in the fields of fuel consumption, noise, and full life, but it will definitely gain the ability to fight with the Thai turbofan engine, the starting system, ignition system, lubricating oil system, and fuel supply system of the Thai aero engine are all consistent with Spey, and the biggest improvement of Thai is to replace the original low-pressure compressor with the low-pressure compressor on the RB211 three-rotor engine.

If Spey's deep modification is successfully rolled off the assembly line, it means that Yuanjia has opened up a large market for at least 1,000 Boeing 727 passenger aircraft converted into freighters on this planet, which is a large market worth 7 billion US dollars for at least 3,000 aircraft engines.

In the historical plane, this modification market was successfully swallowed by Rolls-Royce, and it was full of oil, adding a lot of R&D funds to Rolls-Royce, which had just been privatized.

Of course, in order to achieve this goal, Yuanjia still has a lot of work to do, the current ED125 unit design indicators are still far from the level of Thai aero engines, such as the unit gas generator hot end service life of 2500 hours, although the whole unit adopts the design of maintenance according to the situation, but the maximum 2000 hours interval must be shut down for maintenance.

From the perspective of stricter standards, this set of gas turbine power generation equipment is far from the level of mainstream power generation equipment of the same level in the world after 20 years, which can be described as the difference between heaven and earth.

After 20 years, the service life of E-class gas turbine generator sets will be at least 50,000 hours, and the maintenance interval will be as high as 20,000 to 30,000 hours.

However, fortunately, Yuanjia still has 20 years to chase those high technical indicators, at this time, the international mainstream technical level of E-class gas generator sets is still at the level of 15,000 hours of hot end service life and 6,000 hours of maintenance interval.

The overall reality is that there is a great chance of entering the competitive field with the technical level of the white experimental power station at this time, but it still has the feasibility of commercial application, and the technical success of the three-rotor has laid a solid foundation for the future Spey to regain the sky.

Although the road is still tortuous, the future is bright. (To be continued.) )