A big country of aerospace with black technology

After the previous supercomputing simulation analysis of the propulsion system of the new recoverable rocket, the research and development progress has been greatly advanced.

Although it is said that during the research and development, the problem of the height of the rocket was considered, and there are various models with different thrusts.

But now the task is the most urgent, and the first to develop a successful propulsion system is to adopt the high-thrust scheme of 11 YF-110 liquid oxygen kerosene engines.

Of course, this is also the most difficult thrust system solution. After all, everyone knows that the more the number, the more difficult it is to control it at the same time.

The last time I used supercomputing, I actually calculated the advantages and disadvantages of each design scheme and how to optimize the design scheme.

Supercomputing simulation experiments show that the design scheme of the propulsion system adopting the central layout is not only better than the design scheme adopting the surrounding layout, but also easier to optimize.

For the design of the propulsion system, the Rocket Research Institute has spent manpower and material resources to the extent that others will be very surprised after hearing about it.

For testing, more than 30 YF-110 liquid oxygen kerosene engines were burned on the test bench.

That is to say, the Rocket Research Institute is now richer than before. Otherwise, no matter how bold Zhang Xingyang is, he would not dare to burn money like this.

You know, even if the cost of this engine is very low, with Zhang Xingyang's participation in the design and manufacture, the cost is basically controlled at around two million.

Thirty engines, worth 60 million yuan, were all burnt down on the engine test stand in less than a month.

It is equivalent to burning almost five or six Beijing courtyard houses in one day.

Of course, the degree of burning money of the Rocket Research Institute is not a big deal.

After all, now is not the time for a crazy space race like before when Mao Xiong and Ying Jiang confronted each other.

At that time, Mao Xiong and Yingjiang's annual investment in the aerospace field was almost always calculated as a percentage of the gross national product.

However, at this time, the domestic family background is still relatively weak, and it is impossible to inject huge amounts of funds in this area like those two former superpowers.

At this time, many matters in the country have to give way to economic construction, not only in the aerospace field, but also in many units related to key national defense undertakings.

Especially the navy, air force, and the main ships of the navy are basically outdated models imported from Mao Xiong's family after the founding of the People's Republic of China. No new ships have been built for many years.

As for the Air Force, it's not easy. Ba Ye has been guarding the sky for an unknown number of years, and it will be some time before the birth of J-Shi.

Of course, because of Zhang Xingyang, the J-10 will come to this time much sooner than before, and because there is no need to make a series of changes to adapt to the Su-27, the service time will be much earlier than before.

Compared with the navy and air force, which basically can only rely on equipment exports if they want to find a way out, there are indeed more ways for aerospace systems.

After all, the export of domestic equipment at this time is mainly army equipment. The navy basically does not have any equipment to export, and its own fleets are not enough. How can it get exports.

Compared with the Navy, the Air Force exports more aircraft, but not much more.

Aerospace systems can do much more business. It is most common to launch rockets for others, and satellite R\u0026D and manufacturing actually have a certain amount of business.

If the recyclable rocket is successfully developed this time, the cost of domestic space launches will be further reduced, and more rocket launch tasks can be won.

The propulsion system consisting of 11 YF-110 liquid oxygen kerosene engines with a thrust of 1132KN stands on the engine test bench like a monster.

Below the test stand are several wide flame diversion grooves, in order to guide the huge wake generated during the test run of the propulsion system to the surroundings of the test stand.

This is also to prolong the service life of the test bench, otherwise when the engine is started, the huge flame wake will easily burn the surface of the test bench.

After all, the power of these rocket engines is comparable to dozens of flame cannons, and the temperature of the tail flame can even reach more than 3,000 degrees.

You must know that the melting point of general high-temperature alloys will not exceed 2,000 degrees, and even the melting point of titanium metal is only more than 1,600 degrees.

The strong fortifications made of reinforced concrete can hardly withstand the test of high temperatures above 2,000 degrees.

Therefore, the surface of the test bench is made of ultra-high temperature-resistant composite ceramic material, and the surface is even coated with a layer of carburized film.

The purpose is to prolong the service life of the test bench.

After all, after this, the test bench needs to participate in the verification of a lot of propulsion system schemes. In addition to the 1200-ton thrust system experiment this time, several design schemes with lower thrust also need to be tested on this test bench. Various tests.

In the future, it is impossible for the launch of some small satellites to rely entirely on heavy rockets that are mainly used to launch to the geostationary orbit at an altitude of 36,000 km.

It also needs some smaller thrust, which is mainly used to launch satellites into low-earth orbit.

Of course, after the successful construction of our own space station, they will also be used to deliver supplies and astronauts to the space station.

"Hiroko, how is the preparation for the sixth test of the 1210-ton propulsion system going?"

In the engine test bench test center, Zhang Xingyang was flipping through the test reports of the previous propulsion system tests.

In the past few days, Zhang Xingyang stayed at the launch base all the time because he wanted to watch Chang Sanyi launch two "Iridium" satellites.

Today, the 1210-ton propulsion system is undergoing the sixth test run, and Zhang Xingyang has just rushed back to the rocket engine experiment center from the launch base.

The results of the previous experiments are not particularly clear, and we can only quickly browse the previous test reports to increase our understanding of the latest design of the propulsion system.

Each test report has hundreds of pages, and there are all kinds of complicated formulas and parameters in it. Generally, if a person can read a report clearly in a week, it is considered a good brain.

It took Zhang Xingyang less than half an hour to read the five test reports, and the average reading time for each report was less than six minutes.

Almost at the speed of flipping through books in the eyes of outsiders, he finished reading the entire experiment report.

"The results of the last experiment are actually quite good, but there are still certain problems in the synergy between the various engines."

"This time we have made changes to the linkage of the various lines of the propulsion system, hoping to allow them to play a better synergy."