Not long ago
The JF-22 ultra-high-speed wind tunnel passed the acceptance test
Arouse high attention!
Performance indicators of this country's weight
What level has it reached internationally?
What experiments will it conduct?
That's about 30 times the speed of sound! Reporter visits the JF-22 wind tunnel
Walking into the State Key Laboratory of High Temperature Gas Dynamics located in Huairou Science City, Beijing, the reporter saw the JF-22 ultra-high-speed shock wind tunnel that had just passed the acceptance.
With a total length of 167 meters, its performance indicators are internationally leading, providing strong support for the development of space-space round-trip systems and ultra-high sonic vehicles.
As the cradle of the development of a new generation of aircraft, the JF-22 ultra-high-speed wind tunnel can reproduce flight conditions at altitudes of 40 to 90 kilometers at speeds of up to 10 kilometers per second, equivalent to about 30 times the speed of sound.
According to Jiang Zonglin, researcher at the Institute of Mechanics of the Chinese Academy of Sciences and head of the Huairou Shock Wave Wind Tunnel Project:
- The flow field blown out by JF-22 is about 2.5 meters in diameter, and the largest foreign is generally 1.5 meters in diameter, which can put larger aircraft;
- When the Mach number is 10, JF-22 can reach 40 milliseconds, which is twice as high as the advanced level of similar countries at home and abroad, and the accuracy of experimental results is also higher;
- The JF-22 has high total temperature, high total pressure and high performance, which is currently comparable to no other wind tunnel in the world.
The research team aimed at the research team of space-earth round-trip flight technology first carried out research on the JF-22 ultra-high-speed wind tunnel The research and development goal is mainly to solve the experimental research problems of ultra-high-speed flight technology.
According to Han Guilai, a researcher at the Institute of Mechanics of the Chinese Academy of Sciences and the site leader of the Huairou shock wave wind tunnel, "We are recently studying such a vehicle with two or more stages into orbit, the rocket is vertical take-off and landing, in the future we will take off and land horizontally through the aircraft, and then fly to an altitude of 30 kilometers to 40 kilometers, and then release the second stage, and then fly up, forming such a relay mode, called two-stage or multi-stage orbit, so recently we are also preparing such a corresponding separation scheme experiment. The main thing is to explore the process of separation between the lower level and the upper level. ”
According to Jiang Zonglin, "In wind tunnel research, we have solved the concept of high ultrasonic separation, and from an experimental point of view, we have solved this problem very successfully and safely." In addition, we have to do the following separation at different flight speeds, which is that we can separate in any situation. After these situations are done, if you get these data, it will be very easy to design aircraft and fly experiments. ”
The JF-12 and JF-22 cover the full "flight corridor" experimental capability
In 2012, the JF-12 reproduction wind tunnel was successfully developed, with a total length of 265 meters, becoming the largest and most advanced shock wave wind tunnel in the world at that time. The JF-22 ultra-high-speed wind tunnel has also completed acceptance and officially started operation.
The JF-12 reproduction wind tunnel and the JF-22 ultra-high-speed wind tunnel are the largest and most advanced shock wave wind tunnels in their respective fields, making Continental the only country in the hypersonic field with the ability to cover all "flight corridor" experiments.
The JF-12 replica wind tunnel and the JF-22 ultra-high-speed wind tunnel can achieve experimental conditions of 1.5 to 3 kilometers per second and 3 to 10 kilometers per second, respectively, forming a pneumatic experimental platform covering Mach numbers 5 to 25 and flying altitudes of 25 to 90 kilometers.
Jiang Zonglin said that a wind tunnel can be used to do hypersonic engine tests. "Our laboratory has come up with a new type of engine called a stationary oblique detonation engine. Now we have achieved Mach 7 to Mach 9 with JF-12, and now it seems that the new engine is 50% more thermally efficient than the traditional engine and burns stably; The JF-22 was prepared to go from Mach 9 all the way to Mach 16. If such an engine is done, I think it will be a very big boost to the next step of aerospace technology for our country. ”
In addition, the scientific research team will also use the shock wave wind tunnel experimental platform to carry out research on gliding aircraft, space-earth round-trip vehicles, multi-stage orbit vehicles, etc., to support and serve the major needs and key technologies in the field of national hypersonic science and technology.