Military of China, force comment.
Military of China, force comment.

Video screenshot: icing wind tunnel effect diagram.

WASHINGTON (Hu Xing rain reporters Tangxian Wu) March 15, the Asia’s largest 8 m × 6 m wind tunnel flutter suspension system for an aircraft machine flutter testing success, marking the country have a large wind tunnel flutter testing of the whole machine for the first time. The system can verify that the airplane flutter characteristics to meet the aeroelastic and airworthiness requirements, provide an important basis for determining the aircraft flight envelope.

flutter is an aerodynamic, elastic force and the force of inertia, self-excited vibration. Absorb energy from the air, once the aircraft speed pressure exceeds a critical value, the amplitude will diverge rapidly, within a very short time to destroy the aircraft structure, occur at home and abroad too much from the flutter caused the plane crash accident. Flutter testing in the aircraft development process must be carried out.

flutter suspension system developed in 2009, the system has ups and downs, pitch, yaw, roll, side put five directions of the degrees of freedom can be a real simulation of aircraft movement in the air. For the assessment of system performance, the research group flutter model test of an aircraft machine. The results show that the system has good stability on the aerodynamic interference of the aircraft model and the added mass is small, is an advanced flutter suspension.

The system will enable the 8 m × 6 m wind tunnel with large scale models of full-mode flutter testing, will promote our country to a new level aeroelastic test for China’s large aircraft development provide technical support.