The JF-22 hypersonic wind tunnel has passed the acceptance test. The JF-22 can simulate altitudes of 40 to 100 kilometers. The max flow speed is 10km/sec, equivalent to 30 times the speed of sound. It's a crucial piece of infrastructure for China's missile and space programs as well as for developing hypersonic vehicles.
A TV segment on the JF-22 hypersonic wind tunnel. Some specs are as follows:
- Diameter: 2.5 meters
- Length: 167m
- Temperature range of hypersonic flows: 2500°C to 18000°C
- Air pressure: 100 to 10000 standard atmospheres (atm)
- Air flow speed: Mach 5 to 30
- Simulated altitude: 25 to 90km
- Simulation duration: 40ms at Mach 10
Interestingly, the TV segment also reveals that an oblique detonation wave engine (using aviation kerosene) was tested in JF-22's predecessor, the JF-12 hypersonic wind tunnel, and the engine has achieved stable operation at Mach 9. Next, the engine will be tested in JF-22 at up to Mach 16.