Research on Mechanical and Thermal Test of Typical Adjustable Inlet Flap Component for Hypersonic Aircraft

The adjustable inlet flap of ramjet is a critical component of wide-speed-range hypersonic aircraft, and its strength performance is particularly important for flight safety. This paper focuses on the typical components of the inlet flap, conducting research on ultra-high-temperature structural heating technology and static load application technology. Force and thermal tests were completed on the typical flap components at 1250 ℃. The experimental results show that the stiffness of the typical inlet flap structure at high temperatures is lower than that at room temperature. Under the same static load, the deformation at 1250 ℃ is 1.32 times that at room temperature. Under the same specifications and array spacing of quartz lamps, the heating capacity of a circularly arranged quartz lamp array is 12% higher than that of a planar array. The heating capacity of a circular quartz lamp array with added self-reflective coating can be increased by approximately 20%, demonstrating the ability to maintain ultra-high-temperature heating at 1250 ℃ for extended periods. This effectively simulates the severe high-temperature service environment of the inlet flap structure in hypersonic aircraft.