| Citation: | LIU Qi, LIU Changqing, LI Zengjun. Design of impingement attenuation device for supersonic wind tunnel test models[J]. Journal of Aerospace Power, 2023, 38（2）：364-370 doi: 10.13224/j.cnki.jasp.20210372
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In order to reduce the risk of test model and gauge balance damages induced by shock impingement during intermittent supersonic wind tunnel startup and shutdown, an impingement attenuation device was designed. Composed of upper/lower actuating facilities and flat plates, the four-part connecting rod device was analyzed by finite element method, validating the strength and stiffness of device structures. Servo control system and accompanying software were developed, and the control parameters were determined according to structural dynamics analysis. A working procedure compatible with the wind tunnel was devised, and visualized software interface was customized. The device effectiveness was tested from structural steadiness and attenuation effect. Test results indicated that the device had a favorable effect on impingement attenuation for the normal force and pitching moment, with a decrease of amplitude up to 78% and 77% separately.
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