Foreign media: China has been operating a railway system in Jinan that uses pure electromagnetic force to accelerate heavy objects to supersonic speeds, and it has been running for more than two years. The system is called an electromagnetic sled, and it first broke the sound barrier in 2023, accelerating a one-ton test vehicle to supersonic speed (Mach 1). However, its control method has remained a mystery, as the shock waves generated at supersonic speeds interfere with traditional sensors, and any data loss at such speeds could lead to disaster.
In a recently published peer-reviewed paper, a Chinese research team stated that the unstable aerodynamic interference on the electromagnetic propulsion system at supersonic speeds is extremely high, comparable to driving a car at 1200 kilometers per hour with your eyes closed.
The researchers pointed out that when the linear induction motor operates at supersonic speeds, under conditions of less than 100 meters height and 30 degrees Celsius temperature, the unstable aerodynamic forces caused by shock waves can significantly affect the system's operation.
Original article: toutiao.com/article/1855368970519815/
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